Security Controller

£33,000 to £35,000 per year, An excellent salary + benefit package

Contract Type: Permanent

Hours: Full time

Disability Confident: No

Closing Date: 19/06/2026

Role Information Security Controller Salary up to £35,000 Merthyr Tydfil South Wales Onsite role Starting July 2026

Reporting into the Head of Security in Cambridge, the Security Controller will coordinate and assure physical and operational security across Marshall Land Systems sites, primarily at Merthyr Tydfil.

This role ensures compliance with defence security requirements and enables the secure delivery of programmes, projects and supply chain activities.

The role will manage a small on‑site team in Wales.

• Act as the primary day‑to‑day liaison at Merthyr Tydfil with external security authorities, including DE&S PSyA, UKSV, NCSC, WARP and IVCO, supporting the implementation and ongoing assurance of company security policies, processes, audits, reporting and incident response.
• Oversee physical security arrangements across the site, including access control, CCTV systems and building security in collaboration with Facilities.
• Ensure robust access control and visitor management processes are in place, consistently applied and compliant with required standards.
• Oversee the operation of security systems – CCTV, alarms, access control and incident management tools – ensuring effective monitoring and response.
• Provide direction, coordination and tasking to on‑site security personnel, maintaining situational awareness and effective site coverage.
• Ensure routine security checks, patrols and inspections are completed and meet required standards.
• Support the site Security Team, including recruitment, performance management and professional development.
• Support contract and programme delivery by managing security requirements, including Security Aspects Letters (SALs) and supply chain assurance.
• Support the coordination of site‑level IT service support, including the request and issue of IT equipment, and act as a local point of contact for third‑party IT providers.
• Support and coordinate response to security incidents at the Merthyr Tydfil site, ensuring timely escalation, investigation and reporting in line with company and regulatory requirements.
• Support the Site Manager when required.

• Experience operating within a security role in a regulated or high‑security environment (e.g., defence, government or critical infrastructure).
• Proven experience managing physical security operations, including access control systems, CCTV and site security measures.
• Experience liaising with external security authorities (e.g., UKSV, NCSC, MOD or equivalent bodies).
• Demonstrable experience implementing and assuring security policies, audits and incident response processes.
• Leadership and development of a local security team.
• Experience supporting secure contract or programme delivery, including supply chain assurance and SALs.
• Experience coordinating operational security activities, including incident response and team tasking.
• Exposure to IT service coordination or support within a secure environment.
• Working knowledge of physical security systems – CCTV, access control, alarm systems.
• Strong understanding of security operations, incident response and best practices.
• Ability to oversee and assure security processes, inspections and compliance activities.
• Competence in using security and incident management systems.
• Knowledge of UK Government security standards and frameworks.
• Security Institute, ASIS or equivalent membership; familiarity with IT service management principles (e.g., ITIL).
• Desirable experience within the defence sector or working on government contracts.
• Candidates must be eligible to obtain and maintain UK Security Clearance (SC as a minimum).

• Play a central role in protecting critical defence programmes, national security interests and sensitive assets.
• Regular engagement with external authorities and participation in recognised security forums.
• Opportunities to gain and maintain industry‑recognised security qualifications and certifications, with ongoing support for continuous professional development.
• Direct responsibility for leading and developing a site security team, building people‑management and operational leadership capability.
• Collaborate with IT, Facilities, Supply Chain, HR and Programme teams, building a broad understanding of business operations within a secure environment.
• Opportunity to obtain and maintain UK Security Clearance, enhancing long‑term career prospects within the defence and security sectors.
• Contribute to large‑scale, multi‑site and supply‑chain‑driven projects, building experience in secure programme delivery.
• Opportunity to shape and enhance security processes, systems and standards across the organisation.