Total 42 job vacancies by Opensource Pte. Ltd.

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

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

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

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.

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.

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

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

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.

Key Responsibilities

1. OS & Core Platform Management

• Commission and decommission compute and login nodes.
• Maintain golden images and ensure kernel version alignment and consistency.
• Apply OS hardening in accordance with authority-approved baselines.
• Execute staging-to-production patch cycles with proper validation and rollback plans.
• Detect and remediate configuration drift.
• Perform daily platform health checks and provide validation reports.

2. Virtualization & HCI Operations

• Manage VM lifecycle and maintain template hygiene.
• Execute scheduled monthly platform patching activities.
• Perform backup verification and representative restore testing.
• Participate in quarterly Disaster Recovery (DR) drills.
• Maintain inventory records, tagging standards, and configuration documentation.

3. Incident & Change Management

• Respond to incidents in accordance with SLA targets:
• P1: ≤ 30 minutes response time
• P2: ≤ 1 hour response time
• Implement approved changes with documented impact assessments and rollback plans.
• Perform post-incident Root Cause Analysis (RCA) and track corrective actions.
• Maintain ITSM evidence for all operational activities.

4. Security & Compliance

• Perform vulnerability remediation within defined timelines.
• Conduct key and certificate rotation activities.
• Execute account hygiene checks and periodic access reviews.
• Maintan audit-ready evidence packs and compliance documentation.

Environment / Platforms

• Red Hat Enterprise Linux(RHEL)
• SUSE Harvester
• HPE dHCI
• HPE Performance Cluster Manager (HPCM)
• CheckMK Monitoring System

Required Experience

• Minimum 5 years of experience in Linux system administration
• Experience in HPC environments or large-scale compute clusters preferred

Hands-on experience with:

• Red Hat Enterprise Linux (RHEL OS)
• VMware and/or SUSE Harvester
• Automation scripting (Shell / Python)
• Enterprise monitoring tools

Required Certifications

• ITIL Foundation (mandatory)
• Red Hat Certified SystemAdministrator (RHCSA) or equivalent or higher

Key Responsibilities

1. Parallel Filesystem Management

• Provision and manage project/home directory quotas
• Execute snapshot creation and restore operations
• Conduct data integrity scans and filesystem scrubbing
• Monitor capacity thresholds and watermark alerts
• Perform scheduled failover drills and validation exercises

• Capture and maintain integrity/performance baseline reports
• Apply OEM advisories and remedial actions per runbook

2. HSM / Data Management Operations

• Manage data tiering and archival policies
• Perform recall and restore validation tests
• Monitor media lifecycle and retention compliance
• Conduct integrity scans and namespace housekeeping
• Triage and resolve stuck recall operations
• Maintain recall/restore audit evidence

3. Capacity & Performance Management

• Produce monthly storage performance baselines
• Conduct I/O spot checks and performance analysis
• Monitor storage SLIs and utilisation trends
• Perform capacity forecasting and risk reporting
• Publish capacity and threshold reports to management

4. Compliance, Security & Audit Support

• Maintain data integrity logs and remediation records
• Compile audit-ready evidence packs
• Ensure vulnerability remediation for storage systems
• Coordinate OEM/vendor escalations and TAC cases
• Maintain configuration backups and change records

Environment / Platforms

• HPE ClusterStor 2000
• Lustre Parallel Filesystem
• HPE DMF (HSM)
• VAST Data Storage
• Large-scale HPC storage environment

Required Experience

• Minimum 5 years of recent experience managing Parallel Filesystems such as Lustre, GPFS or equivalent
• Hands-on experience in:
• Large-scale storage environments (Petabyte scale preferred)
• Backup and HSM workflows
• Storage capacity planning and forecasting
• Data integrity and performance monitoring
• OEM coordination and escalation handling

Role Purpose

To manage, operate, and maintain the Client’s HPC compute, login, HCI, and virtualisation platforms in alignmentwith Authority-approved baselines, ITSM processes, cybersecurity requirements, and operational governance policies.

Key Responsibilities

1. OS & Core Platform Management

• Commission and decommission compute and login nodes.

• Maintain golden images and ensure kernel version alignment and consistency.

• Apply OS hardening in accordance with authority-approved baselines.

• Execute staging-to-production patch cycles with proper validation and rollback plans.

• Detect and remediate configuration drift.

• Perform daily platform health checks and provide validation reports.

2. Virtualization & HCI Operations

• Manage VM lifecycle and maintain template hygiene.

• Execute scheduled monthly platform patching activities.

• Perform backup verification and representative restore testing.

• Participate in quarterly Disaster Recovery (DR) drills.

• Maintain inventory records, tagging standards, and configuration documentation.

3. Incident & Change Management

• Respond to incidents in accordance with SLA targets:

  • P1: ≤ 30 minutes response time

  • P2: ≤ 1 hour response time

• Implement approved changes with documented impact assessments and rollback plans.

• Perform post-incident Root Cause Analysis (RCA) and track corrective actions.

• Maintain ITSM evidence for all operational activities.

4. Security & Compliance

• Perform vulnerability remediation within defined timelines.

• Conduct key and certificate rotation activities.

• Execute account hygiene checks and periodic access reviews.

• Maintain audit-ready evidence packs and compliance documentation.

Environment / Platforms

• Red Hat Enterprise Linux(RHEL)
• SUSE Harvester
• HPE dHCI
• HPE Performance Cluster Manager (HPCM)
• CheckMK Monitoring System

Required Experience

• Minimum 5 yearsof experience in Linux system administration
• Experience in HPC environments or large-scale compute clusters preferred

Hands-on experience with:

• Red Hat Enterprise Linux (RHEL OS)
• VMware and/or SUSE Harvester
• Automation scripting (Shell / Python)
• Enterprise monitoring tools

Required Certifications

• ITIL Foundation (mandatory)
• Red Hat Certified SystemAdministrator (RHCSA) or equivalent or higher