Security Engineer

Job Summary

We are seeking a highly skilled and motivated Senior ICT Infrastructure Engineer (Cyber Security Tools) to join our Cyber Security Operations team. The ideal candidate will play a key role in maintaining and enhancing the organisation's cyber security technology stack, with a strong focus on security, compliance, operational efficiency, automation and service excellence.

The role will have a particular focus on the administration, engineering and continuous improvement of the Tenable Vulnerability Management and Compliance Management platform. This includes platform architecture, vulnerability assessment, CIS Benchmark compliance, audit file engineering, automation and the responsible application of AI to improve operational efficiency.

Key Responsibilities

This role ensures the security posture of critical systems through proactive monitoring, incident response, system maintenance, and implementation of security enhancements across the organisation's technology stack.

Be part of a team that is responsible for managing and maintaining the cyber security operations of organisation:

o Lead Vulnerability Management (VM) of assigned cyber security tools, including proactive monitoring of vulnerabilities, planning remediation schedules, adhering to vulnerability deadlines and seeking deviations via Risk Assessment (RA).

• Lead security compliance through regular system hardening, configuration management, and policy enforcement.
• Lead IT lifecycle management.
• Ensure timely and successful updates and upgrades whilst ensuring minimal disruption to business operations.
• Plan downtime and collaborate with cross-functional teams for system updates and upgrades.
• Support regular audits and perform remediation actions.
• Work closely with vendors.
• Provide operations support, in a multi-vendor network including Critical Information Infrastructure (CII).
• Participate in Disaster Recovery (DR) exercise and contribute to architectural planning for managed security tools in cloud environments.
• Manage tool setups and migrations.
• Create, maintain and review technical documentation, Standard Operating Procedures (SOP) as part of Knowledge Management (KM).
• Drive efficiencies through AI and automation.
• Proactive documentation as part of Knowledge Management (KM).
• Occasionally provide after-hours support including weekends as required.

What we are looking for

Requirements

o Bachelor's degree in Cybersecurity, Information Technology, Computer Science, or related field.

• Minimum 5 years of hands-on experience in cybersecurity operations and security tool management.
• Minimum 3 years of hands-on experience administering and maintaining the Tenable vulnerability management platform, including Tenable One, Tenable Security Center, Nessus Scanners, and related components.
• Minimum 3 years of experience in administering and troubleshooting the Tenable Nessus platform, including agent-based scans, credentialed scans, plugin updates, scan policies, and vulnerability assessment operations.
• Minimum 3 years of hands-on experience developing, maintaining, and optimizing Tenable Audit Files for CIS Benchmark compliance scans, including tailoring audit policies to organizational security standards and regulatory requirements.
• Hands-on ability in operating Privileged Access Management (PAM) tools such as CyberArk.
• Good vendor management skills.
• Good written and verbal communication skills with demonstrated ability to influence and communicate effectively with non-technical audiences including management.
• Applicants are expected to manage work in fast-paced environments, across heterogeneous networks including cloud environments, some of which are Critical Information Infrastructure (CII).
• Tenable Security Center Specialist or equivalent certification is a mandatory requirement for this role. Candidates who do not have the relevant certification are advised not to apply.

Preferred Qualifications, Knowledge and Experience

o Proven ability to manage and maintain cyber security operations.

• Good understanding of Vulnerability Management (VM) and Compliance Management processes, with hands-on experience using enterprise security tools such as Tenable Nessus and Palo Alto Networks Prisma Cloud (formerly Twistlock) for vulnerability assessment, compliance monitoring, and remediation support.
• Experience with automation tools and scripting (Ansible, Python, PowerShell) to automate repetitive tasks.
• Experience with Singapore Government security standards and compliance frameworks (IM8, CSA guidelines).
• Experience in harnessing AI solutions to continuously improve cyber security operations efficiency, including processes and service delivery, is advantageous.
• Experience in demonstrating AI literacy with the ability to use AI tools responsibly, ethically, and securely, ensuring compliance with organisational policies, data privacy, confidentiality, and governance requirements.
• Understanding of financial sector security requirements and regulations.
• Tenable Security Center Expert or equivalent certification is preferred.

Deliverables

In addition to the core responsibilities of the role, the engineer will be expected to drive continuous improvement of the Tenable platform through the following AI and automation deliverables:

1. AI-Assisted Tenable Audit File Engineering & Lifecycle Management

o Develop AI-assisted and automation capabilities to support the end-to-end lifecycle of Tenable Audit Files, including analysis, modification, validation, testing, deployment and ongoing maintenance.

• Leverage AI to assist with mapping changes in CIS Benchmarks against existing Tenable Audit Files and identify compliance checks requiring modification, addition or retirement.
• Develop and customise Tenable compliance checks to align with organisational security standards, regulatory requirements and approved deviations.
• Automate impact analysis and documentation of changes made to Tenable Audit Files, including control mappings, modification rationale and version history.
• Implement appropriate validation and testing processes to ensure the accuracy and reliability of AI-assisted Audit File modifications.
• Ensure all AI-generated or AI-assisted changes are subject to engineer review and controlled testing prior to production deployment.

2. Automation of Repetitive Tenable Platform Tasks

o Design and implement automation using Tenable APIs, Python, PowerShell and Ansible to reduce manual effort associated with recurring Tenable platform administration and engineering activities.

• Automate routine activities including asset management, platform and scanner health checks, scan configuration, scanner administration, compliance scan management, Audit File lifecycle management, housekeeping and reporting.
• Develop automated monitoring and health-check mechanisms to proactively identify scanner, scan, plugin, connectivity and platform-related issues.
• Automate collection of diagnostic information and routine troubleshooting activities to improve incident investigation and resolution time.
• Develop reusable scripts, workflows and automation modules to standardise common Tenable operational activities and reduce human error.
• Maintain appropriate documentation, source control and operational procedures for developed automation to ensure maintainability and knowledge transfer.

Expected Outcomes

o The above deliverables should contribute towards reducing manual operational effort, improving consistency and reliability of Tenable platform operations, accelerating the maintenance of CIS compliance content, and strengthening the team's overall Tenable engineering capability.