Total 24 job vacancies by Opensource Technologies Pte. Ltd.

Role Overview

The Security Operation Engineer will move beyond passive monitoring to actively manage, maintain, and remediate security events within a dynamic project environment. Unlike a traditional Level 1.5 SOC monitoring role focused solely on escalation, this position requires hands-on engineering, active remediation, vulnerability handling, and security tool management in a cloud environment.

Key Responsibilities & Workflow

Active Tool & Cloud Management: Manage and configure security infrastructure tools, endpoint protection, and Privileged Access Management (PAM) tools within a cloud environment.

Incident Remediation: Take ownership of security alerts and perform active, hands-on remediation tasks (rather than just routing notifications to external desktop or system engineers).

Vulnerability & Audit Management: Execute daily vulnerability assessments, run security scans, handle vulnerabilities, and collaborate/coordinate with third parties to conduct security scans and audits.

Log Analysis & Infrastructure Monitoring: Utilize SIEM and log analysis platforms (such as RSA NetWitness, Splunk, or Elastic Search) to filter, analyze, and investigate security event data across network devices, firewalls, routers, and operating systems.

Technical Qualifications & Competencies

Security Tooling: Proven experience with SIEM platforms (RSA NetWitness, Splunk architecture/forwarders, Elastic Search), PAM tools (e.g., CyberArk), and Endpoint/Malware protection suites (e.g., Trend Micro).

Operating Systems & Scripting: * Linux: Solid understanding of Linux environments, including basic bash scripting for file filtering and security frameworks (e.g., Metasploit).

Windows: Advanced Windows administration capabilities, including system configuration, security commands, and directory security.

Investigation Depth: Ability to perform deep, independent investigations of complex scenarios (e.g., intranet/air-gapped environment brute-force attempts) rather than relying strictly on Level 2 escalation.

Key Responsibilities:

• Define and oversee project scope and objectives, involving all relevant stakeholders to ensure feasibility and alignment with organizational strategy.
• Develop, maintain, and adapt project plans, schedules, and milestones, ensuring timely delivery within scope and budget.
• Organize and allocate project tasks and resources to ensure efficiency and successful execution.
• Manage changes to project scope, schedule, and costs using appropriate change control processes and tools.
• Collect and organize project data and information to facilitate effective decision-making.
• Manage project financials, including budgeting, forecasting, and financial reporting, ensuring alignment with business objectives.
• Develop and maintain quality assurance processes, ensuring project deliverables meet required quality standards, and drive continuous improvement initiatives.
• Proactively identify, manage, and mitigate project risks, maintaining a risk register and issue log.
• Build and maintain strong relationships with customers and other stakeholders, managing their expectations throughout the project lifecycle.
• Define, manage, and realize project benefits, ensuring alignment with organizational strategy and customer business needs.
• Support the project handover process, including preparation of documentation and training materials, ensuring a seamless transition to operations.
• Document lessons learned throughout the project lifecycle and share insights with team members to foster continuous improvement.

Requirements:

• Proven experience in project management.
• Strong understanding of project management methodologies, tools, and best practices.
• Excellent leadership, communication, and stakeholder management skills.
• Experience managing budgets, schedules, and project risks effectively.
• Ability to drive projects in a dynamic environment with competing priorities.
• Strong analytical and problem-solving skills.
• Familiarity with quality assurance processes and continuous improvement initiatives.

Experience working in Banking / Financial Services or other regulated environments is mandatory.

Network Engineer (Enterprise IT Network Services Deployment & Security)

Responsibilities

• Provide project deployment for customers' Enterprise IT Network Services.
• Work closely with Project Manager to fulfil project deliverables.
• Able to perform the role of Project Lead for medium to mega size projects.
• Preferably with basic knowledge and hands on experience in any of the following areas:
• Design, planning, integration, implementation and validation

LAN/WAN/WLAN: Cisco, Alcatel, Aruba routers and switches

Network security solutions

• Security appliances: Palo Alto, Fortinet, Checkpoints, Cisco IPS/IDS, Cisco ISE, Aruba Clearpass
• Network monitoring: SolarWinds
• Network appliances based: F5 LTM/GTM, A10 LTM
• Build or migrate in Cloud infrastructure solutions
• Troubleshooting and problem identification
• Documentation skills to include creating and updating detailed environment design, installation, support and preventive maintenance documentation
• Develop test cases and conduct proof of concept tests on new software and hardware prior to upgrade/deployment.
• Establish TAC cases with principal vendor in complex problem till resolved.

Requirements

• Preferably with Cisco certification (CCNP)
• Experience with Cisco, Alcatel, F5 products & Firewall products
• Experience with LAN, WAN, WLAN, Data and Security networking in implementation
• Fast-paced environment
• Proven analytical and problem-solving abilities.
• Highly self-motivated and directed, with keen attention to detail.
• Experience working in a team-oriented, collaborative environment.
• Good communication and writing skills.
• Strong customer service orientation
• Able to work flexible hours especially during after-office hour scheduled maintenance windows.

Network Engineer (Enterprise IT Network Services Deployment & Security)

Responsibilities

• Provide project deployment for customers' Enterprise IT Network Services.
• Work closely with Project Manager to fulfil project deliverables.
• Able to perform the role of Project Lead for medium to mega size projects.
• Preferably with basic knowledge and hands on experience in any of the following areas:
• Design, planning, integration, implementation and validation

LAN/WAN/WLAN: Cisco, Alcatel, Aruba routers and switches

Network security solutions

• Security appliances: Palo Alto, Fortinet, Checkpoints, Cisco IPS/IDS, Cisco ISE, Aruba Clearpass
• Network monitoring: SolarWinds
• Network appliances based: F5 LTM/GTM, A10 LTM
• Build or migrate in Cloud infrastructure solutions
• Troubleshooting and problem identification
• Documentation skills to include creating and updating detailed environment design, installation, support and preventive maintenance documentation
• Develop test cases and conduct proof of concept tests on new software and hardware prior to upgrade/deployment.
• Establish TAC cases with principal vendor in complex problem till resolved.

Requirements

• Preferably with Cisco certification (CCNP)
• Experience with Cisco, Alcatel, F5 products & Firewall products
• Experience with LAN, WAN, WLAN, Data and Security networking in implementation
• Fast-paced environment
• Proven analytical and problem-solving abilities.
• Highly self-motivated and directed, with keen attention to detail.
• Experience working in a team-oriented, collaborative environment.
• Good communication and writing skills.
• Strong customer service orientation
• Able to work flexible hours especially during after-office hour scheduled maintenance windows.

Key Responsibilities

• Design, implement, and maintain secure architectures across on-premises and cloud environments (AWS, Azure, GCP).
• Conduct advanced penetration testing, red teaming, and vulnerability assessments on applications, networks, and systems.
• Review and harden system configurations, identity & access management, and network segmentation models.
• Develop threat models and define security architecture blueprints aligned with enterprise risk frameworks.
• Provide expert guidance on remediation of vulnerabilities and coordinate with system owners and developers.
• Integrate security into the SDLC and DevSecOps pipelines; recommend secure coding and deployment practices.
• Support incident response teams in identifying root causes and developing post-incident improvements.
• Evaluate and select appropriate security tools, frameworks, and technologies to strengthen enterprise defense.
• Conduct technical security reviews for third-party solutions and new technologies.
• Mentor security engineers and penetration testers; establish security testing methodologies and standards.

Required Skills & Qualifications

• Bachelor’s degree in Computer Science, Information Security, or related discipline.
• Minimum 8+ years of experience in cybersecurity, including 3+ years in security architecture and penetration testing.
• Proven hands-on expertise in:
  Penetration testing tools: Burp Suite, Metasploit, Nmap, Nessus, Kali Linux, etc.
  Security frameworks: NIST, ISO 27001, CIS, MITRE ATT&CK.
  Scripting languages: Python, PowerShell, or Bash.
  Cloud security controls for AWS / Azure / GCP.
• Deep understanding of network security, application security, encryption, IAM, and threat modeling.
• Strong communication and documentation skills for presenting technical findings to stakeholders.
• Certification:
  Mandatory: OSCP (Offensive Security Certified Professional)
  Preferred: CISSP, CISM, CEH, or AWS Security Specialty

Preferred Experience

• Prior experience in security architecture consulting, red teaming, or offensive security assessments.
• Exposure to container security (Docker, Kubernetes) and cloud-native application protection.
• Knowledge of SIEM/SOAR integration and automation workflows.
• Experience in designing Zero Trust and Defense-in-Depth architectures.

Soft Skills

• Analytical mindset with the ability to think like an attacker and architect like a defender.
• Excellent stakeholder management and presentation skills.
• Strong problem-solving and critical-thinking abilities.
• Ability to work independently and collaboratively across diverse teams.

Role: CloudEngineer (GCC)

KeyResponsibilities:

• Manage the day-to-day operations of Government Cloud (GCC) Microsoft Azure infrastructure, ensuring stability, performance, and security.
• Lead the implementation of Azure cloud projects from planning and design through deployment and documentation.
• Work collaboratively with application, infrastructure, and network teams to support deployments, troubleshoot issues, and align on architectural decisions.
• Design, configure, and manage Azure Virtual Networks and Subnets, enabling secure and scalable cloud environments.
• Configure and maintain Network Security Groups (NSG) to enforce traffic control policies.
• Deploy, configure, and support Azure Load Balancers (LB) for high availability and optimal performance.
• Implement and manage Web Application Firewall (WAF) policies to protect web applications from threats and vulnerabilities.
• Configure and administer Azure DNS for name resolution and service discovery.
• Set up and maintain route tables and virtual network peerings to support hybrid, multi-region, and cross-subscription architectures.
• Integrate and manage syslog solutions and maintain the Azure Log Analytics Workspace for effective monitoring, diagnostics, and auditing.
• Oversee the procurement, management, and renewal of SSL certificates related to WAF and firewall infrastructure.
• Automate infrastructure provisioning and configuration using Terraform, adhering to Infrastructure-as-Code (IaC) standards.
• Ensure adherence to security best practices, compliance standards, and organizational policies.
• Participate in incident response and root cause analysis related to Azure infrastructure.
• Continuously assess the environment for performance improvements, cost optimizations, and new service adoption opportunities.
• Develop performance and operational reports.

RequiredQualifications:

• Certified in Microsoft Azure Administrator Associate (AZ-104) is mandatory.
• Certified in Cisco Certified Networking Associate (CCNA) will be a plus.
• Bachelors Degree or Diploma in Information Technology, Computing or equivalent
• 2–3 years of experience working with Azure infrastructure in GCC 1.0 and 2.0 environment.
• Proven hands-on experience with Terraform for Azure automation.
• Strong knowledge of Azure networking, security, and monitoring tools.
• Familiarity with logging analysis and monitoring via Azure Monitor and Log Analytics.
• Good understanding of ITIL processes, including Incident, Problem, Change, and Configuration Management.

Role: CloudEngineer (GCC)

KeyResponsibilities:

• Manage the day-to-day operations of Government Cloud (GCC) Microsoft Azure infrastructure, ensuring stability, performance, and security.
• Lead the implementation of Azure cloud projects from planning and design through deployment and documentation.
• Work collaboratively with application, infrastructure, and network teams to support deployments, troubleshoot issues, and align on architectural decisions.
• Design, configure, and manage Azure Virtual Networks and Subnets, enabling secure and scalable cloud environments.
• Configure and maintain Network Security Groups (NSG) to enforce traffic control policies.
• Deploy, configure, and support Azure Load Balancers (LB) for high availability and optimal performance.
• Implement and manage Web Application Firewall (WAF) policies to protect web applications from threats and vulnerabilities.
• Configure and administer Azure DNS for name resolution and service discovery.
• Set up and maintain route tables and virtual network peerings to support hybrid, multi-region, and cross-subscription architectures.
• Integrate and manage syslog solutions and maintain the Azure Log Analytics Workspace for effective monitoring, diagnostics, and auditing.
• Oversee the procurement, management, and renewal of SSL certificates related to WAF and firewall infrastructure.
• Automate infrastructure provisioning and configuration using Terraform, adhering to Infrastructure-as-Code (IaC) standards.
• Ensure adherence to security best practices, compliance standards, and organizational policies.
• Participate in incident response and root cause analysis related to Azure infrastructure.
• Continuously assess the environment for performance improvements, cost optimizations, and new service adoption opportunities.
• Develop performance and operational reports.

RequiredQualifications:

• Certified in Microsoft Azure Administrator Associate (AZ-104) is mandatory.
• Certified in Cisco Certified Networking Associate (CCNA) will be a plus.
• Bachelors Degree or Diploma in Information Technology, Computing or equivalent
• 2–3 years of experience working with Azure infrastructure in GCC 1.0 and 2.0 environment.
• Proven hands-on experience with Terraform for Azure automation.
• Strong knowledge of Azure networking, security, and monitoring tools.
• Familiarity with logging analysis and monitoring via Azure Monitor and Log Analytics.
• Good understanding of ITIL processes, including Incident, Problem, Change, and Configuration Management.

Cloud Engineer

We are hiring for Cloud Engineer for one of direct client for onsite singapore.

Role Overview

The role we are evaluating for requires hands-on CAAS Operations and Administration, including telecom-grade Kubernetes (CAAS), VNF/CNF lifecycle management, OpenStack-based NFVi operations, hardware troubleshooting, and optional 5G Core domain expertise.

Kubernetes (Telecom), VNF/CNF Manager, CAAS Operations, Hardware Operations, and Telecom Domain

Competencies Evaluated

• Nokia Product
• Kubernetes - Basic - CAAS
• NCS - CN-A - M1 SDM/HSS Project
• Kubernetes - Telecom - CAAS
• NCS - CN-B - M1 5G Core Project
• Openstack - Basic - IAAS
• VM Resource for NCS CN-A CAAS
• VNF/CNF Manager
• CBAM and NCOM
• Troubleshooting & Operations - CAAS
• NCS CN-A, CN-B
• Troubleshooting & Operations - Hardware
• AF RM 19
• Telecom Domain
• 5G RAN & Core

Technical Requirements

• Red Hat Enterprise Linux (RHEL) system administration
• certified & have very good knowledge of open stack, Kubernetes, Redhat OCP
• expertise spanning IT Infrastructure and Telco Cloud (NFV - OpenStack)
• Work closely with development teams to understand capacity and performance requirements
• Define and implement deployment solutions using container orchestration tools such as Kubernetes and Openshift to ensure scalability and high availability

Job Overview

We are looking for a Senior Data Engineer with strong expertise in cloud platforms and AI-driven solutions. The ideal candidate will have hands-on experience in building scalable data platforms, leading AI initiatives, and managing end-to-end delivery in a cloud-native environment.

Key Responsibilities

• Design and implement scalable data engineering solutions using cloud-native architectures on Azure and AWS
• Lead end-to-end delivery of generative AI projects or AI-powered platforms
• Translate business requirements into robust technical solutions and manage delivery timelines
• Coordinate cross-functional teams including developers, cloud engineers, and data scientists
• Provide technical leadership, mentoring, and guidance to engineering teams
• Ensure adherence to cloud security best practices, including IAM and data privacy for AI workloads
• Troubleshoot complex issues related to AI model deployment and cloud infrastructure

Key Requirements

• Strong proficiency in cloud-native architectures and services on Azure and AWS
• Proven track record in delivering Generative AI / AI-powered platforms
• Experience in technical solutioning and delivery management
• Hands-on experience working with cross-functional teams
• Strong mentoring and leadership skills
• Knowledge of cloud security, IAM, and data privacy practices
• Ability to troubleshoot complex AI and infrastructure issues

The role we are evaluating for requires hands-on CAAS Operations and Administration, including telecom-grade Kubernetes (CAAS), VNF/CNF lifecycle management, OpenStack-based NFVi operations, hardware troubleshooting, and optional 5G Core domain expertise.

Kubernetes (Telecom), VNF/CNF Manager, CAAS Operations, Hardware Operations, and Telecom Domain

Competencies Evaluated

• Nokia Product
• Kubernetes - Basic - CAAS
• NCS - CN-A - M1 SDM/HSS Project
• Kubernetes - Telecom - CAAS
• NCS - CN-B - M1 5G Core Project
• Openstack - Basic - IAAS
• VM Resource for NCS CN-A CAAS
• VNF/CNF Manager
• CBAM and NCOM
• Troubleshooting & Operations - CAAS
• NCS CN-A, CN-B
• Troubleshooting & Operations - Hardware
• AF RM 19
• Telecom Domain
• 5G RAN & Core

Technical Requirements

• Red Hat Enterprise Linux (RHEL) system administration
• certified & have very good knowledge of open stack, Kubernetes, Redhat OCP
• expertise spanning IT Infrastructure and Telco Cloud (NFV - OpenStack)
• Work closely with development teams to understand capacity and performance requirements
• Define and implement deployment solutions using container orchestration tools such as Kubernetes and Openshift to ensure scalability and high availability

Job Scope

• Perform routine operational tasks in administration and support of on-premise Tenable VMS solutions located at customer sites, in accordance with the established policies, procedures and processes
• Work with other team members and customer’s teams to meet or exceed operational SLA, especially on incident, problem, service request, patching and vulnerability management
• Develop and update VMS scan jobs
• Perform scheduled VMS scans
• Develop and update VMS reports
• Onboard and offboard assets to VMS solutions, troubleshoot and resolve asset onboarding issues with the asset owners
• Develop and continually update procedures, processes and documentation for operations in accordance with customer requirements, government regulations, industry standards and product best practices.
• Prepare operational reports (regular and ad-hoc) accurately and timely.
• Comply with all service management processes and requirements
• Execute Service Requests submitted by the customer within the agreed timeline
• Track operational metrics
• Implement mitigations on identified risks
• Remediate security findings from security assessments and audits
• Respond to system alerts and incident reported by customer after office hours
• Perform system maintenance activities after office hours
• Provide standby support after office hours

Requirements

• Degree in Computer Science, Information Systems, Cyber Security or a related discipline
• Two or more years of professional work experience in operational management or support of Tenable VMS solutions in large enterprises and MNCs.
• Good knowledge of common security solutions and their integration with external systems and common services (DNS, Domain Controller, NTP, Log Management, System Monitoring, Backup, VMS, 2FA, etc)
• Able to work in customer premises
• Able to perform system maintenance activities after office hours
• Able to provide standby support after office hours

Junior System Engineer (NetBackup)

Job Scope

• Support Windows/Linux servers and daily system operations
• Monitor and manage backups using Veritas NetBackup
• Perform basic backup & restore activities
• Troubleshoot backup and system issues
• Assist in patching, upgrades, and health checks
• Maintain documentation and reports

Requirements

• 1–3 years of IT / System support experience
• Basic knowledge of Veritas NetBackup or similar tools
• Understanding of Windows/Linux environments
• Good troubleshooting and communication skills

Ops Manager

a. Job Description

• Oversee the delivery of IT services, ensuring they meet established SLAs and service quality standards.

• Handle escalations and major incidents, ensuring timely resolution and effective communication with stakeholders. Investigate and escalate lapses or complaints relating to the Service Desk Engineers to the EDX team.

• Leads the team to perform service recovery in the event of issues.

• Manage daily manpower resourcing by overseeing both the Service Desk team and a pool of buffer Service Desk engineers to cover planned leaves/urgent leave/ medical leave.

• Mentor, provide guidance and support to the Service Desk team.

• Lead and develop the service desk team, including hiring, training, and performance evaluations.

• Ensure the team knows how to use the provided ESM tool (e.g.ServiceNow) effectively for ticket management and service delivery.

• Ensure the entire team is familiar with and kept up-to-date on the service desk processes and workflow.

• Identify and implement improvements along with updating of documentation for service desk processes and procedures.

• Foster a customer-centric culture within the team, emphasising excellent customer service.

• Attends regular meeting (weekly and monthly) with EDX Team and prepare weekly and monthly reports.

• Suggest and implement service improvement plans to enhance service delivery and employee satisfaction.

• Provide suggestions to the EDX team on what to update in the IT ServiceDesk playbook, ensuring it is comprehensive and current.

• Stay relevant with industry trends and best practices, integrating them into the service delivery strategy.

• Adhere to ITIL processes and frameworks, ensuring best practices in IT service management.

b. Education

• Degree in Computer Science, Information Technology, or a related field.

c. Certifications

• ITIL 4 Foundation Certification

• ITIL 4 Intermediate / Expert preferred

• Project Management Professional (PMP) or similar will be an added advantage.

d. Technical Skills

• Strong understanding of minimally end user computing devices, M365applications, network, endpoint protection and Video Conferencing/ AV solutions will be an advantage

• Proficiency in using ESM tools such as ServiceNow.

e. Experience

• Prior experience in a service delivery or IT management role within a corporate environment.

• Strong background in managing and leading IT Service Desk operations and teams for at least 3 years.

Key Responsibilities

• Design, implement, and maintain secure architectures across on-premises and cloud environments (AWS, Azure, GCP).
• Conduct advanced penetration testing, red teaming, and vulnerability assessments on applications, networks, and systems.
• Review and harden system configurations, identity & access management, and network segmentation models.
• Develop threat models and define security architecture blueprints aligned with enterprise risk frameworks.
• Provide expert guidance on remediation of vulnerabilities and coordinate with system owners and developers.
• Integrate security into the SDLC and DevSecOps pipelines; recommend secure coding and deployment practices.
• Support incident response teams in identifying root causes and developing post-incident improvements.
• Evaluate and select appropriate security tools, frameworks, and technologies to strengthen enterprise defense.
• Conduct technical security reviews for third-party solutions and new technologies.
• Mentor security engineers and penetration testers; establish security testing methodologies and standards.

Required Skills & Qualifications

• Bachelor’s degree in Computer Science, Information Security, or related discipline.
• Minimum 8+ years of experience in cybersecurity, including 3+ years in security architecture and penetration testing.
• Proven hands-on expertise in:
  Penetration testing tools: Burp Suite, Metasploit, Nmap, Nessus, Kali Linux, etc.
  Security frameworks: NIST, ISO 27001, CIS, MITRE ATT&CK.
  Scripting languages: Python, PowerShell, or Bash.
  Cloud security controls for AWS / Azure / GCP.
• Deep understanding of network security, application security, encryption, IAM, and threat modeling.
• Strong communication and documentation skills for presenting technical findings to stakeholders.
• Certification:
  Mandatory: OSCP (Offensive Security Certified Professional)
  Preferred: CISSP, CISM, CEH, or AWS Security Specialty

Preferred Experience

• Prior experience in security architecture consulting, red teaming, or offensive security assessments.
• Exposure to container security (Docker, Kubernetes) and cloud-native application protection.
• Knowledge of SIEM/SOAR integration and automation workflows.
• Experience in designing Zero Trust and Defense-in-Depth architectures.

Soft Skills

• Analytical mindset with the ability to think like an attacker and architect like a defender.
• Excellent stakeholder management and presentation skills.
• Strong problem-solving and critical-thinking abilities.
• Ability to work independently and collaboratively across diverse teams.

System Engineer

Engineers can preferably be degree holders who have at least 2 years’ experience if they do not do supervisory roles. Diploma holders will be given engineer.

At least 1 to 2 years working experience in assisting the senior engineer and able to work independently on their daily tasks.

1. Minimally need to have CCNA or networking equivalent qualification.

2. Have basic understanding of virtualization such as VMs

3. Have basic understanding on cybersecurity technologies, firewalls, antivirus etc.

4. Assist the senior engineer in carrying out daily tasks such as deploying laptops for exercises.

5. Assists users in preparing for cyber exercises, setup OS Windows login etc.

6. Need to take on routine O&S functions, basic system health checks on servers and storage.

7. Doing system backups, check server status and configure IPs and VLANs for training. Doing OS patching.

For Project Requirement Cat 1 clearace required