Total 21 computer security job vacancies

As an IT Infrastructure Operations & Support Engineer, you are responsible for ensuring the reliability, security, and efficiency of our clients' IT infrastructures. Your expertise will contribute to maintaining and enhancing complex network environments, fostering secure and resilient systems essential for business operations.

Key Responsibilities

• Perform preventive and corrective maintenance on IT infrastructure, including servers, networks, operating systems (Windows and RHEL), and related platforms to ensure high availability, stability, and reliability of services.
• Execute incident resolution and problem remediation in alignment with Incident Management and Problem Management processes, acting as an escalation point for infrastructure-related incidents to ensure timely service restoration within agreed Service Level Agreements (SLAs).
• Advise customers on performance and capacity improvement recommendations; and implement optimization initiatives
• Implement and maintain security controls for customers, including patch management, vulnerability remediation, access controls, and system hardening, in compliance with customer security policies and best practices.
• Ensure the timely application of security patches and updates in accordance with established Change and Release Management processes to maintain system integrity and security posture.
• Maintain accurate and up‑to‑date IT documentation, including system configurations and architecture, Standard Operating Procedures (SOPs), maintenance and recovery procedures, and incident and problem records; produce operational and security reports, including incident post‑mortems and root‑cause analyses (RCA), for management and customers; and improve service consistency while enhancing response and resolution times in alignment with customers’ SLAs.

• Collaborate closely with customers, internal teams, and external service providers to ensure seamless IT operations; coordinate audit, incident, and change activities; and communicate technical risks, service impacts, and recommendations clearly and effectively to non‑technical customer stakeholders. Demonstrate the ability to work independently, manage priorities effectively, and take ownership of assigned tasks and initiatives.

Skills and Qualifications

• Minimum 5-7 years of experience in IT infrastructure management and/or information security within enterprise or customer‑facing environments.
• Strong understanding of IT infrastructure, including hardware, software, operating systems, networking, and security principles.
• Proven experience in IT operations management, including system administration, patch management, and system health and performance monitoring. Excellent problem‑solving, communication, and stakeholder management skills, with the ability to articulate technical concepts clearly to both technical and non‑technical audiences.
• Proficiency in Microsoft technologies, including Active Directory, Certificate Authority (PKI), Group Policy, and other related Microsoft infrastructure services.
• Willing to be on 24x7 standby
• Possess valid class 3 license is a plus point.

Work location: Jurong East

Responsibilities

• Lead and oversee the deployment, configuration, integration, and optimization of complex enterprise network and security solutions.
• Serve as the technical lead for mid to large‑scale projects, providing architectural guidance, technical direction, and oversight across multi‑disciplinary teams.
• Collaborate closely with Project Managers to ensure project scope, timelines, quality standards, and customer requirements are consistently met.
• Implement and provide advanced support for network infrastructure solutions on platforms such as Cisco, Alcatel and Solarwinds
• Implement and provide advanced support for security technologies including Palo Alto, Fortinet, Checkpoint, Cisco Firepower, and Cisco ISE.
• Drive complex root‑cause analysis efforts, lead incident resolution, and act as technical escalation for network performance, security events, and critical connectivity issues.
• Prepare, review, and maintain comprehensive technical documentation, including high‑level designs (HLDs), low‑level designs (LLDs), configuration baselines, installation guides, and operational procedures.
• Conduct knowledge‑sharing sessions, internal training, and post‑incident reviews to uplift team capability and improve operational efficiency.
• Promote a culture of collaboration, accountability, and continuous improvement across the engineering organization.

Requirements

• Professional certifications such as CCNP, CCIE, or equivalent senior‑level credentials are highly preferred.
• Extensive hands‑on experience with enterprise networking and security technologies, including Cisco, Alcatel, Checkpoint, Palo Alto, and Fortinet platforms.
• Proven expertise in the design, implementation, and optimization of LAN, WAN, WLAN, data networking, and security architectures.
• Strong ability to operate in a fast‑paced, mission‑critical environment, managing complex tasks and multiple priorities with minimal supervision.
• Demonstrated analytical, troubleshooting, and root-cause analysis skills in large-scale enterprise environments.
• Experience working in a team-oriented, collaborative environment, with the ability to guide junior engineers and provide technical leadership.
• Excellent communication, stakeholder engagement, and technical documentation skills.
• Willing and able to support flexible work hours, including after-office-hour maintenance windows

Location: Jurong East

Responsibilities:

• Provide both corrective and preventive maintenance for customers’ Enterprise IT Network services, ensuring reliable network performance.
• Perform break-fix support, including troubleshooting and identifying issues across all network services.
• Develop and execute preventive maintenance activities following the PM checklist, conducting functional and health checks at clients’ premises, and submitting the required reports.
• Create test cases and conduct proof-of-concept testing for new hardware and software before upgrades or deployment.
• Collaborate closely with the Customer Success Managers to meet operational requirements, deliverables, and service reporting needs.
• Initiate and manage TAC cases with principal vendors for complex issues, ensuring timely resolution.

Requirements:

• Minimum 3–5 years of hands-on network technical support experience, preferably within a Systems Integrator (SI) environment.
• Strong technical troubleshooting capabilities with proven analytical and problem-solving skills.
• Practical experience in implementing, maintaining, and supporting LAN, WAN, WLAN, data networking, and security solutions, including break-fix activities.
• Cisco certifications are preferred.
• Hands-on experience with the following technologies and platforms are preferred:
• Cisco: Wireless, Routers, Catalyst & Nexus Switches, Firepower, IPS/IDS, ISE, ASA, ESA, WSA, SMA
• Firewalls: Fortinet, Check Point, Palo Alto
• Tools / Solutions: SolarWinds NPM/NCM/NTA, F5 LTM
• Ability to perform effectively in a fast-paced work environment.
• Highly self-motivated, detail-oriented, and able to work independently.
• Strong teamwork and collaboration skills.
• Good verbal and written communication skills.
• Strong customer service mindset and professionalism.
• Able to support 24×7 standby duties as required.

Work location: Jurong East 

ST Engineering is a global technology, defenceand engineering group with offices across Asia, Europe, the Middle East and theU.S., serving customers in more than 100 countries. The Group uses technologyand innovation to solve real-world problems and improve lives through itsdiverse portfolio of businesses across the aerospace, smart city, defence andpublic security segments. Headquartered in Singapore,ST Engineering ranks among the largest companies listed on the SingaporeExchange.

Join our Cyber Team

We are an industry leader in cybersecurity with over two decadesof experience, we deliver a holistic suite of trusted cybersecurity solutionsto empower cyber resilience for government and ministries, criticalinfrastructure, and commercial enterprises. Backed by our indigenouscapabilities and deep domain expertise, we offer robust cyber-secure productsand services in cryptography, cybersecurity engineering, digitalauthentication, SCADA protection, audit and compliance. We specialise in thedesign and build of security operations centres for cybersecurity professionalsand provide managed security services to strengthen the cybersecurity postureof our government and enterprise customers.

Theincumbent will automate and manage machine learning pipelines, enablingseamless model retraining, testing, and deployment to ensure reliable andefficient AI operations. 

Thisrole is ideal for a hands-on MLOpsEngineer who thrives on automating complex AI workflows andensuring the seamless, reliable operation of machine learning systems inproduction environments. 

Responsibilities 

• Design, implement, and maintain automated machine learning pipelines for training, validation, testing, and deployment of AI models. 
• Ensure continuous integration and delivery (CI/CD) of models into production environments, with support for versioning, rollback, and monitoring. 
• Automate model retraining workflows based on triggers such as performance degradation, new data availability, or updated business requirements. 
• Develop and manage infrastructure for scalable and reproducible ML experiments, using tools such as MLflow, Kubeflow, or similar. 
• Collaborate with data scientists and AI engineers to ensure smooth handoff from experimentation to production. 
• Monitor pipeline health, resource usage, and model performance in production, ensuring uptime and fast recovery from failures. 
• Implement testing strategies for models, including unit tests, integration tests, and data validation checks. 
• Optimize pipeline efficiency across compute, storage, and deployment layers. 

Requirements 

Experience 

• Preferably possess 1-3 years of experience in MLOps, DevOps, or machine learning engineering with a focus on operationalizing AI workflows. 
• Proven experience deploying and managing ML models in production environments. 

Technical Skills 

• Proficiency in Python and ML engineering tools (e.g., MLflow, Airflow, DVC, Kubeflow, or similar). 
• Experience with containerization (Docker), orchestration (Kubernetes), and cloud services (AWS, GCP, Azure). 
• Familiarity with CI/CD practices for ML and version control systems (e.g., Git). 
• Understanding of monitoring, logging, and alerting for ML pipelines and models. 

Preferred Knowledge 

• Experience with agentic AI systems or workflows involving continuous learning and tool interaction. 
• Knowledge of data drift detection, model validation, and feedback loop design. 
• Exposure to real-time or streaming data pipelines (Kafka, Flink, etc.). 

Work location: Jurong East

Findout more: https://www.stengg.com/cybersecurity

ST Engineering believes in fostering a culture where team membersare encouraged to overcome challenges, explore new ideas, and work together tosucceed. We value individuals who are determined to push beyond the boundaries,and have a thirst for knowledge, continuous learning, and self-improvement.

Job Description

We are looking for a Cyber Range Engineer focused on designing, building, and running realistic cyber range scenarios that reflect current threat activity. This role is hands-on and adversary-minded: you will translate threat landscape reporting and real-world TTPs into end-to-end exercise content (attack paths, injects and artifacts).

Responsibilities

• Create/Develop Cyber Range scenarios based on current threat landscape, adversary trends and relevant risk.
• Create realistic exercise artefacts and injects (e.g., phishing emails, malicious documents, command histories, web logs, domain activity, cloud audit events, IAM changes) to support Blue Team exercises.
• Validate scenario functionality in the range: ensure dependencies are in place, paths execute as intended, and “teachable moments” are aligned to learning objectives.
• Support exercise execution and facilitation.
• Assist with dry runs and rehearsals, adjust scenario pacing, and provide technical support during live execution.
• Record outcomes, key timelines, and notable participant actions for post-exercise review.
• Maintain accurate documentation of scenario packages, threat mappings (e.g., ATT&CK), prerequisites, and known issues/edge cases.
• Contribute to post-exercise reporting by providing the attack narrative, evidence trail, expected vs observed detections, and improvement recommendations for detection/response.
• Understand best practices in hardening, policy configurations for organisations.

Requirements

1 to 2 years of experience in one or more of the following:

• security operations / incident response support
• penetration testing / red teaming / purple teaming
• detection engineering labs / cyber range / CTF scenario development

Added Advantage (Preferred Knowledge / Skills)

• Windows and Linux fundamentals, including common logging sources (Windows Event Logs, Sysmon concepts, Linux auth logs).
• Networking fundamentals (IP addressing, DNS, HTTP/S, routing, segmentation concepts).
• Familiarity with adversary techniques and frameworks (MITRE ATT&CK, kill chain concepts).
• Practical scripting capability for repeatability/automation (PowerShell, Python, Bash).
• Basic understanding of cloud platforms (AWS, Azure, or GCP), especially audit/logging concepts.
• Exposure to security tooling and telemetry sources.
• EDR concepts (e.g., CrowdStrike, Microsoft Defender for Endpoint, SentinelOne)
• SIEM/log platforms (Splunk, Microsoft Sentinel, Elastic/Wazuh)
• Network/security controls (Palo Alto, Fortinet) and relevant log types

Work location: Jurong East

ST Engineering is a global technology, defenceand engineering group with offices across Asia, Europe, the Middle East and theU.S., serving customers in more than 100 countries. The Group uses technologyand innovation to solve real-world problems and improve lives through itsdiverse portfolio of businesses across the aerospace, smart city, defence andpublic security segments. Headquartered in Singapore,ST Engineering ranks among the largest companies listed on the SingaporeExchange.

Join our Cyber Team

We are an industry leader in cybersecurity with over two decadesof experience, we deliver a holistic suite of trusted cybersecurity solutionsto empower cyber resilience for government and ministries, criticalinfrastructure, and commercial enterprises. Backed by our indigenouscapabilities and deep domain expertise, we offer robust cyber-secure productsand services in cryptography, cybersecurity engineering, digitalauthentication, SCADA protection, audit and compliance. We specialise in thedesign and build of security operations centres for cybersecurity professionalsand provide managed security services to strengthen the cybersecurity postureof our government and enterprise customers.

Thisrole is ideal for a hands-on AI professional with both technical expertise anddomain sensitivity—capable of shaping intelligent, adaptive agents that performreliably in complex, real-world environments. 

Responsibilities 

• Train and configure agentic AI systems to operate effectively within specialized domains, ensuring alignment with domain-specific goals, constraints, and terminology. 
• Customize agent workflows, toolchains, and decision logic to reflect domain context, operational requirements, and user expectations. 
• Adapt reasoning, planning, and state management components for accuracy and relevance in industry-specific applications. 
• Collaborate with domain experts to capture knowledge, define task flows, and validate agent behavior in representative environments. 
• Fine-tune models and configure tool integrations to support effective interaction, tool use, and decision-making in real-world scenarios. 
• Monitor agent performance, identify misalignments with domain expectations, and iteratively improve workflows and configurations. 
• Support evaluation, simulation, and continuous learning pipelines to refine agent behavior based on feedback and performance data. 
• Document domain-specific configurations, training protocols, and best practices for scalable deployment across similar use cases. 

Requirements 

Experience 

• Preferably possess few years in AI system training, workflow configuration, or intelligent system customization, with a focus on domain adaptation. 
• Experience working with AI/ML tools in applied settings such as healthcare, finance, logistics, manufacturing, or defense. 

Technical Skills 

• Strong proficiency in Python and experience with AI/ML frameworks (e.g., PyTorch, TensorFlow). 
• Familiarity with agentic AI workflows, including planning, tool use, and multi-step task execution. 
• Hands-on experience configuring AI tools, models, and pipelines for use in constrained or specialized environments. 
• Ability to interpret domain-specific requirements and translate them into actionable agent behaviors. 

Preferred Knowledge 

• Exposure to multi-agent systems, LLM orchestration frameworks (e.g., LangChain, Autogen), or intelligent automation platforms. 
• Experience working with structured knowledge bases, ontologies, or knowledge graph integrations. 
• Familiarity with simulation environments or digital twins for domain-specific AI testing and training. 

Work location: Jurong East

Findout more: https://www.stengg.com/cybersecurity

ST Engineering believes in fostering a culture where team membersare encouraged to overcome challenges, explore new ideas, and work together tosucceed. We value individuals who are determined to push beyond the boundaries,and have a thirst for knowledge, continuous learning, and self-improvement.