Communications System Engineer

Synergize Consulting Ltd; Greater London; On-site; GBP 124,000 - 165,000; Full time

Job summary

Synergize Consulting Ltd in London is seeking an experienced DV Cleared Communications Systems Architect to design and deliver secure cross-domain collaboration environments across restricted networks. This senior role focuses on cross-domain solutions, secure UC integration, and interoperability across SIP/H.323/VTC, with emphasis on availability, security and IA.

Onsite at the London HQ, you will lead technical directions and collaborate with security and engineering teams to deliver

Qualifications

• DV clearance required and full-time onsite at London HQ.
• Senior UC/communications architect with defence/government exposure.
• Ability to design cross-domain, secure collaboration across multiple vendors.

Responsibilities

• Design and deliver secure cross-domain solutions and MLS gateways.
• Enable secure voice, video and chat across classified networks.
• Architect and integrate complex, multi-vendor UC environments.
• Provide interoperability across SIP, H.323, VTC, IM and presence.
• Develop fault-tolerant, low-latency communications architectures.
• Ensure IA, security and compliance requirements are met.
• Lead engineering teams delivering secure communications solutions.
• Collaborate with architecture, security and engineering stakeholders to ensure end-to-end integrity.

Skills

Unified Communications

Cross-Domain Solutions

SIP/H.323/VTC

UC integration

Secure networks

Security architecture

Information Assurance

Technical leadership

Job description

Communications Systems Architect (DV Cleared)

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 fulltime 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:

• 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.