Communications Systems Architect

Defence & Secure Communications industry

London HQ (Fulltime onsite, no remote working)

Up to £105 p/h Outside IR35

*This role requires live DV clearance and Full time onsite work in the London HQ, please only apply if you hold the relevant clearance and are willing/able to be based onsite fulltime*

We are seeking an experienced DV Cleared Communications System Architect to design and deliver secure, resilient collaboration environments across complex and highly restricted network domains.

This is a senior technical role focused on cross-domain communications, secure collaboration and multi-vendor UC integration, supporting environments where security, availability and interoperability are critical.

Key Responsibilities

• Design and deliver secure cross-domain solutions (CDS), guards and multi-level security (MLS) gateways
• Enable secure voice, video and chat communications across separate classified or isolated network domains
• Architect and integrate complex, multi-vendor Unified Communications (UC) environments
• Provide interoperability across SIP, H.323, VTC, instant messaging and presence platforms
• Develop robust, fault-tolerant and low-latency communication architectures
• Ensure solutions meet stringent Information Assurance (IA), security and compliance requirements
• Lead and provide technical direction to engineering teams delivering secure communications solutions
• Work across architecture, engineering and security stakeholders to ensure end-to-end solution integrity

We're looking for someone with strong experience in:

• DV Clearance (Non negotiable requirement)
• Unified Communications/Secure Communications
• Cross-Domain Solutions (CDS) and security gateways
• SIP/H.323/VTC
• Multi-vendor UC integration and interoperability
• Classified, isolated or highly secure network environments
• Security architecture and Information Assurance
• Designing highly available, resilient and low-latency communications platforms
• Technical leadership/solution architecture within complex environments

Experience within Defence, Government, National Security or other high-assurance environments would be highly advantageous.

This is an opportunity for a senior UC/communications architect or technical lead to work on mission-critical secure communications infrastructure, where interoperability and security are equally important.