Senior Security Engineer in Belfast

This is an exceptional opportunity to be part of a security-first culture where protecting client data isn't just a compliance requirement - it's foundational to the firm's global reputation and trusted partnerships. Security receives full senior leadership backing, and the team continues to evolve in line with industry-leading frameworks and best practice.

About the Team

The Information Security function forms a central pillar of the organisation's wider technology landscape. With a blend of mature and emerging capabilities, the team covers all core elements of cyber defence, engineering, operations, governance, and risk. Security strategy aligns to globally recognised frameworks such as NIST, ISO27001, and SOC2, ensuring the organisation remains resilient in the face of an ever-shifting threat landscape. You'll also benefit from collaboration with security specialists across the business - including teams who advise international clients on cyber risk and incident response, offering rich insight and knowledge-sharing.

What You Will Do

• The Senior Security Engineer plays a crucial role in designing, deploying, and enhancing the firm's security infrastructure. The position combines hands-on engineering with strategic input, incident response, and continuous improvement of monitoring and defensive capabilities.
• Security Engineering & Infrastructure - Support the build, deployment, and maintenance of secure infrastructure across the organisation. Manage and optimise SIEM and SOAR platforms to strengthen detection and response capabilities. Troubleshoot and resolve issues across the wider technology stack.
• Security Consultation & Collaboration - Provide engineering guidance to teams across the business, supported by senior security colleagues. Partner with IT, managed service providers, and global teams to ensure consistent application of controls.
• Automation & Operational Efficiency - Contribute to the automation of security processes, reducing manual overheads and increasing efficiency. Track KPIs and performance metrics to measure control effectiveness and inform future improvements.
• Security Architecture & Strategy - Assist in shaping a robust, scalable security architecture alongside senior engineers and trusted partners. Support delivery of the security engineering roadmap aligned to wider business and technology objectives. Monitor and report progress on key security engineering initiatives.
• Incident Response & Vulnerability Management - Help enhance monitoring and detection alongside the Cyber Defence and wider security teams. Participate in incident investigations, remediation, and post-incident analysis. Collaborate with vulnerability management teams to address findings and strengthen overall posture.

What You Will Bring

• Strong hands-on experience in information security or infrastructure engineering, including time spent in a Security Engineering capacity.
• Solid understanding of networking fundamentals such as TCP/IP and key services like DNS and SMTP.
• Practical operational experience in multiple areas, including:

• SIEM and SOAR
• Detection rules, playbooks, and use cases
• Ansible
• Firewalls / IDS / IPS
• Windows and Linux platforms
• Cloud security or CNAPP
• AWS or Azure

You’ll Stand Out If You Bring

• A degree in Information Security, Computer Science, Engineering, or related discipline.
• Recognised industry certifications such as: CISSP, CEH, CISM, CompTIA Security+

What’s on Offer

A generous package designed to support wellbeing, development, and work-life balance, including: Pension and income protection, Private medical insurance, Increasing holiday entitlement, Flexible benefits, lifestyle discounts, and reward schemes.

To speak in absolute confidence about this opportunity please send an up-to-date CV via the link provided or contact Senior Recruitment Consultant Stuart Kennedy at MCS Group.