Total 2,442 construction engineer job vacancies in Information Technology category

Job Description & Requirements

• Round-the-clock monitoring and maintenance of the System (hardware and software) to ensure system uptime in accordance to SLA commitments
• Respond to all incident / service calls and be first responder onsite to troubleshoot and resolve incidents including basic repairs or parts replacements
• Create / update and track ticket in ticketing tool to closure observing SLA commitments
• Escalate, when necessary, in accordance to escalation matrix
• Perform regular preventive and corrective maintenance, troubleshooting system hardware and all computer-based systems.
• Coordinate and work with third-party suppliers or other contractors to identify the causes of issues e.g. hardware, software, network problems and etc. that may affect the proper functioning of the System.
• Liaise and work closely with customers to address service concerns and to solve technical problems.
• Work with technical team to resolve more advanced issues when necessary
• Perform Install / Move / Add / Change (IMAC) activities as tasked
• Ensure all material is properly documented and handed over during shift changes
• Perform any ad-hoc duties as assigned
• Build sustainable relationships and engage customers by taking the extra mile

Requirements:

• Diploma or Higher NITEC in Electrical Engineering, Electronics, Information Technology, or a related discipline.
• 1–2 years of relevant experience in system monitoring, operations support, or a similar environment.
• Experience in a monitoring center or operations support role is preferred.
• Basic knowledge of networking and database management is advantageous.
• Exposure to electrical/mechanical drawings, service manuals, or technical documentation is an added advantage.
• Airport operations experience will be an advantage.
• Strong communication, analytical, and problem-solving skills.
• Self-motivated, proactive, and able to work independently as well as within a team.
• Ability to work effectively under pressure and interact with stakeholders at all levels

Working hours

• Rotating 12 hours shift or as assigned.
• Shift pattern: 3 Days work shift followed by 2 days’ rest, 2 Days work shift followed by 3 days’ rest
• 2 Months Day shift, followed by 2 months night shift

Reporting locations: Woodlands, ability to travel to other sites during shift may be required 

Compensation:

Annual Bonus: Yes, 1 month annual bonus 

Allowance & Variable Components: Yes

Job Summary:

The role involves providing comprehensive technical support and maintenance for operating systems, middleware, databases, LDAP, and container orchestration platforms. The candidate will be responsible for deploying, configuring, and managing these systems to ensure smooth operations in development and testing environments. In addition to hands-on technical tasks, the role requires supporting bid activities by producing infrastructure sizing and deployment topology, coordinating with cross-functional teams, and leading infrastructure-related discussions to enable effective planning and deployment at the customer site.

Key Roles and Responsibilities:

⦁ Provide support and maintenance for operating systems, including Windows, Linux, and IBM AIX, Solaris.

⦁ Deploy, configure and maintain middleware infrastructure, including IBM WebSphere, IBM MQ, Red Hat JBoss Enterprise Application Platform, and Red Hat JBoss AMQ.

⦁ Install, configure, and manage database servers, including IBM DB2, PostgreSQL, MySQL.

⦁ Install, configure, and maintain LDAP servers, including IBM Security Directory Server and Apache LDAP.

⦁ Install, configure, and maintain container orchestration platforms, including Kubernetes and Red Hat OpenShift Container Platform (OCP) clusters.

⦁ Handle technical matters such as troubleshooting, patching, and upgrading systems, both operating systems and middleware.

⦁ In addition to hands-on technical responsibilities, support bid activities by providing infrastructure sizing, coordinating with cross-functional stakeholders, and leading end-to-end technical discussions related to infrastructure planning and deployment.

Job Requirements and Qualifications:

⦁ Minimum 5-8 years of IT experience.

⦁ Ideally, exposure to both operating system and middleware administration.

⦁ Solid understanding of application architecture, covering authentication, web server, database servers, application servers, and messaging servers.

⦁ Proficient in Unix Shell scripting.

⦁ Hands-on experience with containerization technologies like Docker, Kubernetes, and OpenShift.

⦁ Eagerness to explore legacy systems and embrace new cloud platform services, along with a positive attitude to join the team on this journey.

⦁ Possession of any cloud certifications (e.g., AWS, Azure, GCP, or Red Hat) will be advantageous.

⦁ Excellent communication and collaboration skills to work effectively with cross-functional teams and stakeholders.

Driven by the passion to improve quality of people’s lives, WSA continues to grow as market leader in the hearing aid industry. With our commitment to increase penetration in an underserved hearing care market, we want to accelerate our business transformation in order to reach more people, more effectively.

We are looking for a collaborative and detail-oriented Software Test Engineer to join our R&D team. In this role, you will play a key part in ensuring the quality of our B2B software products, working across the full software testing life cycle in an agile environment and contributing directly to the reliability of hearing solutions that improve people’s lives.

What you will do

• Design and execute comprehensive test cases from requirements, ensuring high coverage across different testing phases

• Develop, enhance and maintain test suites using BDD practices, including writing and maintaining Gherkin scenarios aligned with business requirements

• Track and investigate defects using defect management tools with development teams throughout the resolution process

• Prepare clear and detailed test reports supported by execution evidence, communicating quality status and risks to key stakeholders

• Work closely with developers, business analysts and product owners for early testing involvement and convert testing strategies into test specifications

• Take ownership of product quality and proactively support team members to improve overall testing effectiveness

What you bring

• Degree in computer science or a related field

• 3 to 5+ years of experience in manual software testing and test automation; experience in medical product testing would be an advantage

• Strong understanding of the Software Testing Life Cycle, including testing methodologies, techniques and levels

• Good communication and collaboration skills, with the ability to work as an individual contributor and as part of a cross-functional team

• Experience in agile/scrum environments with hands-on client coordination

• Proficient in defect management tools such as Azure DevOps, ALM, or TFS, with a strong understanding of defect tracking, triage, and resolution

Who we are

At WSA, we provide innovative hearing aids and hearing health services.

Together with our 12,000 colleagues in 130 countries, we invite you to help unlock human potential by bringing back hearing for millions of people around the world.

With us, you will become part of a truly global company where we care for one another, welcome diversity and celebrate our successes.

Sounds wonderful? We can't wait to hear from you.

WSA is an equal-opportunity employer and committed to creating an inclusive employee experience for all. Regardless of race, color, religion, national origin, age, sex, gender, gender identity, gender expression, sexual orientation, marital status, medical condition, ancestry, disability, military or veteran status we firmly believe that our work is at its best when everyone feels free to be their most authentic self.

About the team

The Regulatory Reporting team builds and operates Airwallex's automated compliance reporting pipeline across 10+ jurisdictions globally. Beyond data pipelines, we build the internal tools that compliance and operations teams use daily — regulatory calendars, submission dashboards, AI-powered review interfaces, and data investigation workbenches. Good tooling directly reduces compliance risk and operational burden.

What you'll do

You will own the frontend layer of Airwallex's regulatory reporting platform — building the interfaces that compliance analysts, finance teams, and operations staff use to review, validate, and manage regulatory submissions.

Responsibilities

• Build and maintain internal web applications for regulatory report review, submission tracking, and compliance calendar management.

• Design and implement data-heavy UI components: tables, charts, and drill-down views for financial data at scale.

• Build AI-assisted review interfaces — workbenches where compliance teams interact with LLM agents for regulatory interpretation and gap analysis.

• Collaborate with backend engineers on API design and data contracts; own the BFF (Backend-for-Frontend) layer where needed.

• Contribute to shared component libraries and design system conventions used across Core Banking tooling.

• Implement client-side data validation and error handling appropriate for high-stakes compliance workflows.

• Set up and maintain frontend testing practices (unit, integration, E2E) and CI/CD pipelines.

Who you are

Minimum qualifications

• 2+ years of frontend development experience.

• Proficient in React and TypeScript; comfortable with modern state management patterns.

• Experience building complex, data-intensive web applications — tables, filters, charts, drill-down views.

• Strong understanding of API integration (REST, GraphQL).

• Detail-oriented about UI correctness and data presentation accuracy.

Preferred qualifications

• Experience building internal tooling or operational dashboards in a fintech or data-heavy domain.

• Familiarity with data visualisation libraries (e.g., Recharts, D3, AG Grid).

• Experience with Node.js/BFF patterns for backend-for-frontend service layers.

• Exposure to LLM-powered UI patterns — chat interfaces, streamed responses, tool-use feedback loops.

• Experience with micro-frontend architecture or multi-team frontend platforms.

• Comfortable with CI/CD pipelines and cloud deployment.

Responsibilities:

• Design, develop, and maintain Java applications to meet business and technical requirements.
• Provide expertise in coding, testing, deployment, and support of enterprise applications.
• Collaborate with architects, business analysts, and project managers to ensure timely delivery of robust and secure systems.

Requirement

• Diploma or degree in Computer Science, Information Technology, or related discipline
• At least 1 year of software development experience in Java, Spring Boot, SQL
• Experience with Java frameworks and enterprise application development
• Experience in AWS cloud, Springboot, Spring, Weblogic, Hibernate, maven, Jasper Reports, ReactJS is an added preference
• Experience in system analysis, troubleshooting, and performance tuning
• Familiarity with the software development lifecycle (SDLC)

Interested applicants, Please send your updated resume in Word format to hres@itcspl.com

Please indicate Job Code "Java Software Engineer - 101" on email subject

We regret that only shortlisted candidates will be notified.

Bacalso John Bryan Bedayo (Reg No. R1106648)

IT Consultancy & Services Pte Ltd

EA No: 92C5311

Please visit www.itcspl.com to learn more information about ITC

Job Description:

• Develops and optimizes BCD process technology and devices for power applications, involving TCAD simulations, device layout, characterization, and bench testing
• Develop and integrate new BCD device architectures and process modules for company BCD platforms.
• Conduct TCAD simulations to understand device behavior and calibrate simulation models to match experimental results.
• Design and lay out device test structures and new BCD device platforms.
• Analyze device performance and reliability through bench testing and data collection.
• Work with cross-functional teams, including the modeling team, to satisfy customer needs and develop advanced device models.

Job Requirement:

• Min Degree in Physics or Electrical Engineering.
• Min 3 year of expereince in TCAD (Technology Computer-Aided Design) tools for simulation and calibration.
• Experience with device layout, design rule checks, and test structure generation.
• Knowledge of BCD process development and device characterization techniques.

To submit your application, please apply online to apply@rn-care.com or call +(65) 6513 5697 for private and confidential discussion.

Your interest will be treated with the strictest of confidence. We regret that only shortlisted candidates will be notified or contacted.

RN Care Pte. Ltd
EA License No: 17C8900

Role Summary

We are seeking a highly skilled Big Data Engineer with strong experience in PySpark and Scala to design, build, and optimizelarge-scale data processing systems.

The associate will work on distributed data platforms, enabling real-time and batch analytics solutions across enterprise data ecosystems.

The role involves building scalable data pipelines, data lakes, and streaming solutions leveraging modern big data technologies.

This role requires a combinationof:

Strong PySpark + Scala coding

Deep big data architecture knowledge

Hands-on experience with streaming + cloud data engineering

Required Skills

Core Technologies

Strong hands-on experience in:

PySpark & Apache Spark

Scala programming

Expertise in:

Spark SQL, Data Frames, RDDs

Distributed data processing frameworks

• Design, develop, and maintain scalable data pipelines and data processing frameworks.
• Build ETL/ELT solutions to ingest, transform and process structured and unstructured data.
• Develop high-performance data workflows using Python, Spark and distributed computing technologies.
• Implement data models, data lakes, warehouses and Lakehouse architecture.
• Develop and support data pipelines powering AI/ML models and analytics solutions.
• Partner with Data Scientists to produce machine learning models.
• Build feature engineering pipelines and reusable ML datasets.
• Implement MLOps practices, including model deployment, monitoring and lifecycle management.

Skills/Requirement -

• Strong hands-on experience in Data Engineering.
• Hands-on experience building large-scale data pipelines.
• Strong programming experience with Python.
• Experience working with cloud-based data platforms.
• Exposure to AI/ML model lifecycle and MLOps practices.

• You will be responsible for designing, developing, and implementing equipment control software for advanced semiconductor automation systems. You will collaborate closely with cross-functional teams to deliver reliable, high-performance solutions aligned with customer requirements.
• Gather, analyze, and clarify customer requirements and technical specifications; prepare Software Design Documents (SDD).
• Develop equipment control software using PLC programming and C#.NET, leveraging in-house libraries and development tools.
• Implement software solutions in compliance with established coding standards and best practices.
• Perform unit testing, debugging, and system validation to ensure functionality, reliability, and performance.
• Conduct peer code reviews to maintain software quality and consistency.
• Ensure compliance with software quality processes as well as Health, Safety & Environment (HSE) requirements.
• Develop training materials and support training sessions for Field Service Engineers and end users.
• Collaborate with Mechanical, Electrical, and Field Service teams for system integration and deployment.

Requirements

• Bachelor’s Degree in Electrical Engineering, Computer Engineering, Computer Science, or related discipline.
• Eexperience or knowledge in PLC programming and/or C#.NET development.
• Familiar with IEC 61131-3 standards such as Ladder Logic, Structured Text (ST), CoDeSys, TwinCAT, or equivalent platforms.
• Strong problem-solving skills with a hands-on mindset and willingness to work on equipment integration.
• Self-motivated, independent, and adaptable with a passion for engineering excellence.
• Good communication and teamwork skills in a cross-functional environment.
• Knowledge of cybersecurity concepts and SECS/GEM communication protocols will be an added advantage.

By sending your job resume to us, it shall be deemed that you have agreed and hereby give your consent to MANFIELD in collecting, using and/ or disclosing your personal data for the purpose of accessing and processing your job application and/ or for future job opportunities within MANFIELD and/ or with the client(s) of MANFIELD. If you wish to withdraw your consent, please notify us. Kindly visit our company website for more information on the Privacy Policy.

WE REGRET TO INFORM THAT ONLY SHORTLISTED CANDIDATES WILL BE NOTIFIED

Manfield Employment Services Pte Ltd
EA Licence No: 95C2823
Posting Personnel: Quennie Chen

EA Personnel Registration No: R1222837

We are looking for a skilled OSAT & AdvancedPackaging Engineer to drive Advanced packaging with external OSAT partners.This role will focus on advanced packaging technologies, ensuring high-quality,cost-effective, and timely product delivery while collaborating withcross-functional team.

Job Responsibilities:

• Work on 2.5D/3D packaging platform technologies.
• Develop bump, underfill, molding and RDL processes.
• Collaborate with internal R&D and OSAT partners to driveHeterogeneous Integration.
• New advanced packaging process verification and qualification.
• Customer engagement and new product verification

Capability

• Knowledge of bumping, molding, dicing, bonding, RDL (RedistributionLayer), and interconnect technologies are plus.
• Experienced in 2.5D and 3DIC process development are plus.
• Skill on FMEA, control plan, DOE (design of experiment) and problemsolving.
• Good communication, self-motived and avid learner

Qualification

• Atleast bachelor degree in electronics/electrical/physics/Materials engineeringor other relevant fields.
• At least 2 years working experience inOSAT R&D/Packaging/Process engineer or other relevant fields.
• ProficientEnglish oral and writing skill.

Responsibilities:

• Develop new applications and enhance existing systems using .NET, C#, and Angular
• Analyze and interpret requirements from Business Analysts and Consultants
• Design and implement solutions based on functional and technical specifications
• Collaborate with the development team while adhering to coding standards and best practices
• Provide on-site support as needed and travel overseas
  

Qualifications:

• Min 2–3 years of relevant working experience
• Proficient in frontend technologies (Angular, PrimeNG, HTML, CSS, JavaScript, JSON, Bootstrap) with experience in responsive design
• Basic to intermediate backend knowledge (.NET, C#, Web API, SQL Stored Procedures, SSRS)
• Solid understanding of Object-Oriented Programming (OOP) principles
• Familiarity with Git version control is an added advantage
• Able to work under tight deadlines with a strong sense of ownership

We regret only shortlisted candidates will be contacted. All applications will be handled confidentially. By submitting your application, you agree to the collection, use, retention, and disclosure of your personal information to prospective employers.

Wecruit Pte Ltd
EA License No: 20C0270
EA Personnel: Nyon Hock Sen (Aden)
EA Personnel Reg No: R24124070

Be at the Heart of Semiconductor Test Innovation

We’re looking for experienced Application Engineers who want to do more than just development — engineers who want to own solutions end-to-end and see them deployed in real production environments.

In this role, you will design, build, and deliver advanced test solutions across ABI, SLT, and ATE platforms, working directly with global customers and cross-functional engineering teams.

If you enjoy solving complex problems, working hands-on with systems, and seeing your work go live in manufacturing — this is the role for you.

What you'll be driving

• Development of high-performance semiconductor test solutions
• Application board design, validation, and system integration
• Test program development and optimization
• End-to-end delivery from requirements → solution → deployment → sustainment

What you'll do

Build & Deliver Solutions

• Design and develop application solutions for ABI, SLT, and ATE platforms
• Develop, debug, and optimize test programs for real production use
• Manage application board design, assembly, and validation

Engage Customers & Define Solutions

• Work with customers to understand complex technical requirements
• Translate requirements into scalable and practical engineering solutions
• Support solution scoping, costing, and quotation activities

Drive Integration & Deployment

• Lead solution validation, customer acceptance, and production roll-out
• Ensure smooth transition from engineering to manufacturing
• Partner with global teams to deliver high-quality outcomes

Sustain & Improve Systems

• Provide sustaining engineering support for deployed solutions
• Troubleshoot issues in live production environments
• Drive improvements based on real-world data and feedback

Why This Role Stands Out

• Work on advanced semiconductor test platforms (ATE / ABI / SLT)
• Be part of global projects across Asia and the US
• Exposure to real-world deployment and customer environments
• Strong mix of engineering, problem-solving, and customer engagement
• Opportunity to grow into Technical Lead, Solution Architect, or Global Application roles

What We’re Looking For

• Degree in Electronics Engineering or related discipline
• Min 5 years of experience in ATE, semiconductor test, or application engineering
• Strong fundamentals in analog/digital electronics and test systems
• Experience in test program development and application validation
• Comfortable working across teams and engaging customers globally
• Exposure to ABI, SLT, or semiconductor test environments is a strong advantage

Our esteemed client in the Manufacturing industry is seeking a Technical Sales Engineer (HVAC) to join their dynamic team:

• Employment Type: Permanent
• Position: Technical Sales Engineer
• Location: Kaki Bukit
• Working Hours: Monday to Friday, 8am to 5.30pm
• Salary Package: Basic + Commission

Job Responsibilities:

• Actively prospect and engage clients to promote and sell HVAC and ATCS solutions. Close deals and consistently achieve revenue targets to drive market growth.
• Serve as the technical expert for ATCS during client presentations. Analyze technical requirements and recommend tailored, energy-efficient solutions.
• Manage the end-to-end tender process. This includes attending tender briefings, conducting site visits, and preparing highly detailed technical proposals and RFPs.
• Calculate accurate Bills of Quantities (BOQs), select appropriate equipment, and ensure technical specifications align with project requirements.
• Optimize HVAC solutions to balance client needs with internal cost control, ensuring healthy profit margins and competitive pricing.
• Act as the vital link between the client, internal engineering teams, and external vendors to ensure a seamless transition from pre-sales to project implementation.

Job Requirements:

• At least Diploma in Mechanical Engineering or related field, with minimum 1 year of sales experience in HVAC, cooling systems, or industrial equipment.
• Strong technical understanding of mechanical systems (e.g. cooling towers, chillers, heat exchangers)
• Experience in tendering, proposal preparation, and cost estimation is an advantage

Ready to apply? Here’s how: 

• Click the APPLY button, or 
• Email your resume (in MS Word or PDF format) to adelin@intuitrecruitment.com. Include the job title in your email subject line for prompt processing. 

Only shortlisted candidates will be notified. 

By submitting your application, you consent to the collection and use of your personal data under Personal Data Protection Act (PDPA). 

Adelin Chong | EA Personnel Reg No.: R1875641 

Intuit Recruitment Pte Ltd | EA License No.: 25C2793 

Who We Are 

We are a global technology consultancy with a trademarked, AI-first engineering approach for accelerating the delivery of digital products and revolutionizing platform modernization. We do the right thing, and we do it right. We're proud to be a World Economic Forum New Champion, and a B Corp-certified company. 

About Gen-e2 

While the market is still largely AI-augmenting delivery, we have reinvented the SDLC to be AI First. Our approach is a game-changer in productivity and quality: 

• We now generate 95% of the entire product — code, documentation, infrastructure as code, and even design — with GitHub Copilot.
• The quality consistently exceeds the output of our best traditional engineering teams.
• A product repository houses all product artefacts, giving AI full project context for higher-quality generation.
• A library of rules and prompts defines coding standards, design principles, and security guidelines, ensuring enterprise-grade quality and scalability. 

With Gen-e2, we deliver end-to-end products 2–3× faster than traditional approaches, while raising the bar for engineering excellence 

YOUR ROLE AND RESPONSIBILITIES 

As a member of an Agile delivery team, you will be responsible for the design and execution of test automation and quality engineering activities across Web, API, Mobile, Cloud, and Data platforms. You will define and implement test strategies with the team in applying automation, exploratory, performance, and data pipeline testing practices effectively. 

You will: 

• Be responsible for building and maintaining scalable automation frameworks for Web, API, Mobile, Cloud, and Data systems.
• Define and execute test strategies, balancing automation, exploratory, performance, and data testing.
• Implement automation scripts using tools such as Selenium, Playwright, Cypress, Appium, and Katalon.
• Design and execute tests for data platforms, including ETL pipelines, data quality, schema validation, and transformation logic.
• Apply structured test approaches for data engineering workflows (batch vs. streaming, ingestion, transformation, storage, and consumption).
• Integrate automated tests into CI/CD pipelines and ensure reliable execution.
• Perform exploratory testing to uncover gaps not easily detected by automation.
• Support performance, scalability, and reliability testing using tools like JMeter, Gatling, or k6.
• Apply AI-powered QA tools and prompt engineering techniques to accelerate test creation and analysis.
• Collaborate closely with developers, product owners, and business analysts to ensure requirements are testable and automation-ready.

WHO YOU ARE 

• Strong experience in test automation, framework design, and quality engineering.
• Solid background in functional and automation testing across Web, API, Mobile, Cloud, and Data platforms.
• Strong in hands-on coding in Java, JavaScript, Python, or similar languages for automation.
• Hands-on experience in mobile automation testing with Appium and/or Katalon.
• Exposure to performance and load testing.
• Experience with AI/ML-driven test tools and basic prompt engineering.
• Strong background in exploratory testing and modern test design techniques.
• Good understanding of Agile/Scrum delivery.
• Familiarity with CI/CD pipelines (GitHub Actions, Jenkins, GitLab CI) and cloud-native testing (AWS, Azure, GCP).
• Excellent collaboration and problem-solving skills. 

BONUS SKILLS 

• Knowledge of data platform & data engineering pipeline testing (ETL validation, streaming, data quality).
• Experience with big data test strategies and analytics validation. 

We will be prioritizing applicants who have a current right to work in Singapore, and do not require sponsorship of a visa. 

MORE ABOUT PALO IT: 

We’re eager to adapt to change, learn from our experiences and move to meet our planet’s urgent needs. With 2025 as our horizon, we are taking action to meet the following objectives: 

• Become a climate net-zero company
• Attain 50% of revenue from projects with a positive impact
• Train 100% of our workforce on impact
• Achieve B Corp certification among all 16 of our offices across the globe
• Continuously measure & improve employee happiness 

Our clients (https://www.palo-it.com/en/case-study) are amongst the world's most successful companies. We innovate with both established Fortune 1000s, SMEs and start-ups who aim to make an impact, become global leaders and address the world's most complex challenges. 

What We Offer 

• Stimulating working environments
• Unique career path
• International mobility
• Internal R&D projects
• Knowledge sharing
• Personalized training 

For more on our team culture and benefits, check out our careers page (https://www.palo-it.com/en/career) 

PALO IT Singapore is an equal opportunity employer. Employment decisions will be based on merit, qualifications and abilities. Palo IT SG does not discriminate in employment opportunities or practices 

Company Overview

TeleScience Singapore is an established ICT company supplying and servicing a broad range of networking, broadband transmission, GPS time servers and synchronized clocks, cyber security solutions and test equipment. Our clients include telecom carriers, service providers, local and foreign MNCs, and system integrators.

Job Summary

Provide comprehensive pre-sales and post-sales technical support for ICT products, ensuring successful project implementation and customer satisfaction through consultancy, demonstrations, installation, training, and maintenance.

Responsibilities

• Deliver technical consultancy during pre-sales to support customer decision-making and product proof of concept demonstrations
• Execute post-sales activities including installation, commissioning, training, and maintenance of ICT equipment to ensure operational success
• Collaborate with customers and suppliers to coordinate and ensure timely and effective project implementation
• Advise and support the internal sales team with technical expertise to enhance sales effectiveness
• Monitor and manage inventory levels to maintain sufficient stock for fulfilling maintenance contract obligations