Chief Security Architect

Chief Security Architect Overview

We are seeking a highly skilled Chief Security Architect to take on a senior technical leadership role within a high-assurance cyber security consultancy. This position involves significant client interaction and technical authority over security architecture, particularly in Defence, Government, and Critical National Infrastructure sectors.

Key Responsibilities

• Lead the design and assurance of secure architectures across complex Defence, Government, CNI, and mission-critical environments.
• Define security requirements, threat models, architectural principles, and appropriate security controls throughout the system lifecycle.
• Identify and manage security risks in both high-level and detailed solution designs, offering practical mitigation strategies for both new and legacy systems.
• Conduct client architecture reviews, serve as a design authority, and facilitate technical workshops with senior security, technology, and program stakeholders.
• Translate complex technical risks into clear, actionable recommendations for CISOs, SROs, boards, and program leadership.
• Produce high-quality security architecture artifacts, including documentation, risk assessments, design reviews, security requirements, and remediation roadmaps.
• Establish technical standards and ensure the quality of security architecture deliverables produced by consultants.
• Develop security architecture methodologies, capabilities, and best practices across the broader practice.
• Act as the senior technical point of contact for the NCSC Security Architecture offering, providing technical leadership across consultants and client engagements.
• Support business development through bids, proposals, client meetings, and the creation of new security architecture services.

Qualifications and Experience

• A seasoned Security Architecture professional with extensive experience in Defence, Government, National Security, CNI, or other high-assurance environments.
• At least 10 years of experience in security architecture or closely related fields.
• Chartered Cyber Security Professional (ChCSP) accreditation in Secure System Architecture and Design is essential.
• Active DV clearance and the ability to meet UK residency requirements.
• Demonstrated experience leading secure solution architecture in complex, multi-supplier, and/or classified programs.
• Strong knowledge of NCSC guidance, Secure by Design principles, Cyber Assessment Framework (CAF), NIST, and ISO 27001 standards.
• Experience applying risk-driven security architecture methodologies to complex systems and environments.
• A solid understanding of security requirements, threat modeling, risk assessment, and security controls.
• Ability to communicate complex technical risks and recommendations to both technical and executive-level audiences.
• Experience in leading or mentoring security consultants and ensuring the quality of technical outputs.
• Excellent client-facing, communication, and influencing skills.

Benefits

• Competitive salary ranging from £90,000 to £120,000 GBP, with potential bonuses.
• Opportunity to work in a hybrid or remote capacity.
• Engagement in high-impact projects within a specialist high-assurance security environment.
• Chance to influence the architecture of complex systems in Defence, Government, and CNI sectors.
• Professional development opportunities, including leading and mentoring other security architecture professionals.

If you are an experienced Security Architect with active DV clearance and ChCSP accreditation, and you are ready to take genuine technical ownership of an NCSC-assured Security Architecture capability, we would love to hear from you.

Degree Requirement: Not Specified

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