Security Architect

Security Architect

+6 months +

+Hybrid working in Corsham

+Inside IR35

+SC cleared role

Skills:

+MOD

+HLD / LLD

+ VMware Horizon, ESXi, vCentre, vSAN

+PKI

We are seeking an experienced Security Architect to support the design and assurance of secure, enterprise-grade solutions for a major MOD NSOIT programme. Working at the heart of the OpNET Solution Design Authority, you'll play a vital role in developing secure, interoperable, and compliant architectures for a complex, high-security environment.

Key Responsibilities:

• Provide expert security input into OpNET's technical roadmap and High-Level Designs (HLDs) for the NSOIT solution.

• Design Intermediate Level Designs (ILDs) that align to MOD policies and industry best practices.

• Review and assure Low-Level Designs (LLDs) and Detailed-Level Designs (DLDs).

• Identify system vulnerabilities and advise on mitigation strategies.

• Assess and review third-party services for security compliance.

• Define and document security elements within the architectural runway, guiding platform and cyber teams (e.g., logging, antivirus, cyber defence, firewall configuration).

Essential Skills & Experience:

• Proven experience delivering secure architecture within complex, large-scale government or defence programmes.

• Deep knowledge of:

  • Secure infrastructure and software solution design

  • MOD security standards and NCSC design patterns

  • Public and private cloud solutions using Software Defined Datacentre (SDDC)

  • Secure cryptographic provisioning, PKI, ADFS, proxy services

  • Defence Lines of Development and MOD Capability Integration

• Technical expertise across:

  • VMware Horizon, ESXi, vCentre, vSAN

  • Microsoft Server (), Windows 10, Exchange, SQL, Skype, Group Policy

  • Linux-based VDI solutions

• Experience with MOD service management tooling and ITIL

• Strong communication and analytical skills, with the ability to engage diverse technical and non-technical audiences.

• Security certifications and experience with accredited secure solutions in the UK Public Sector.

• Current SC clearance

If you'd like to discuss this Security Architect role in more detail, please send your updated CV to and I will get in touch.