Contract Infra Security Engineer: Linux & Kubernetes GPU

OneAsia Network Limited; Hong Kong; On-site; HKD 600,000 - 900,000; Full time

Job summary

OneAsia Network Limited is seeking an Infrastructure Security Engineer to secure a Linux-centric HPC environment in Hong Kong. You will own vulnerability management, patching, threat analysis, and hardened configurations across infra and Windows Server interfaces.

You will work with networking, HPC, AI, and platform teams, gain exposure to mission-critical GPU workloads, and grow security expertise with mentoring from seasoned professionals.

Qualifications

• Minimum 5 years of professional experience, including at least 2 years in a Security Engineer or related cybersecurity role.
• Strong understanding of networking fundamentals and firewall policy management.
• Experience with Linux systems (Ubuntu preferred) and containerization/Kubernetes basics.
• Experience securing and troubleshooting enterprise infrastructure.

Responsibilities

• Secure and maintain Linux-centric enterprise infrastructure operating within an HPC environment.
• Manage the full vulnerability management lifecycle, including identification, assessment, remediation, verification, and reporting.
• Review threat intelligence reports and assess potential impact to the environment.
• Review and analyse security alerts escalated by a managed SOC and coordinate remediation activities.
• Apply security patches and fixes across infrastructure platforms and document procedures.
• Implement and validate security hardening controls across Windows Server where applicable.
• Support penetration testing engagements, vulnerability assessments, and security audits.
• Collaborate with infrastructure, platform, and operations teams to improve security posture.

Job description

OneAsia Network Limited is seeking an Infrastructure Security Engineer to secure a Linux-centric HPC environment in Hong Kong. You will own vulnerability management, patching, threat analysis, and hardened configurations across infra and Windows Server interfaces.

You will work with networking, HPC, AI, and platform teams, gain exposure to mission-critical GPU workloads, and grow security expertise with mentoring from seasoned professionals.