SC Systems Architect

**Job Title: SC Cleared Systems Architect (Military Messaging Solution)

Location: Corsham

Duration: 12 months

Rate: Up to £500 per day via an approved umbrella company

Must be willing and eligible to go through the SC clearance process** Our Client is hiring for a reputed client to support the UK Strategic Command with expert system architecture, technical assurance, and migration design services for a secure multi-domain Military Messaging Solution (MMS). If you enjoy solving complex technical challenges while keeping governance and security front and centre, this is a role where your architecture decisions genuinely matter.

What You'll Be Doing

• Own technical design accountability for the MMS target architecture and ensure strong architectural governance
• Develop and assure high-level and low-level designs for secure, multi-domain message routing across distinct security domains
• Verify system topologies align with standard protocols such as STANAG 4406, STANAG 5066, ACP127, and DOI 103(s)
• Support information assurance mapping, including security boundaries, cross-domain solutions, guard gateways and PKI token structures to meet defence accreditation needs
• Lead legacy modernisation and IP migration from synchronous serial infrastructure to IP-routed network environments
• Create obsolescence roadmaps for legacy cryptographic devices and message switches, including bridging architectures to maintain live service continuity
• Produce reference architectures for integration with CCEB (5-Eyes) and NATO multi-national messaging gateways
• Standardise configurations to securely onboard maritime endpoints (including mobile naval units and tactical nodes)
• Act as an independent technical advisor in project updates, stakeholder workshops, and maintain clear, timely communication

What You'll Bring

• Strong system architecture experience spanning HLD/LLD, routing and topology assurance
• Confidence working within MOD-aligned standards and frameworks, including JSP604/453
• Practical understanding of interoperability engineering and secure integration patterns
• The ability to communicate architecture decisions clearly to stakeholders and workshops
• A security-focused mindset, working within OFFICIAL and OFFICIAL-SENSITIVE classifications (with secure access)

If you're SC cleared and ready to lead mission-critical architectural governance and modernisation, apply now and take the next step with a team that values expertise, clarity and delivery. If you receive suspicious outreach claiming to be from us, please contact us via the ManpowerGroup website.