SC-Cleared Systems Architect for Secure Military Messaging

Experis (Austria); Corsham; On-site; GBP 90,000 - 115,000; Full time

Job summary

Experis is hiring a SC Cleared Systems Architect for a 12-month assignment in Corsham. The role focuses on expert system architecture for a secure Military Messaging Solution, including governance and secure design across multiple domains.

You will develop high-/low-level designs, ensure alignment with defence standards, and lead migration and modernization efforts to support live service continuity.

Qualifications

• Strong system architecture experience spanning high- and low-level designs.
• Familiar with MOD-aligned standards and frameworks.
• Understanding of interoperability engineering and secure integration patterns.
• Ability to communicate architecture decisions clearly to stakeholders.
• Security-focused mindset with OFFICIAL classifications experience

Responsibilities

• Own technical design accountability for the MMS target architecture and governance.
• Develop high- and low-level designs for secure, multi-domain message routing across domains.
• Verify topologies align with STANAG 4406, STANAG 5066, ACP127 and DOI 103(s).
• Map information assurance, including security boundaries, cross-domain solutions, and PKI structures.
• Lead legacy modernization and IP migration from serial to IP-based networks.
• Create obsolescence roadmaps for legacy crypto devices and message switches.
• Produce reference architectures for CCEB (5-Eyes) and NATO gateways.
• Standardize configurations to onboard maritime endpoints securely.
• Act as independent technical advisor in updates and workshops

Skills

System architecture

HLD/LLD

MOD standards

Interoperability engineering

Stakeholder communication

Job description

Experis is hiring a SC Cleared Systems Architect for a 12-month assignment in Corsham. The role focuses on expert system architecture for a secure Military Messaging Solution, including governance and secure design across multiple domains.

You will develop high-/low-level designs, ensure alignment with defence standards, and lead migration and modernization efforts to support live service continuity.