Principal Security Architecture Consultant

Job Description

Salary Range: £53,269 - £85,000

Leonardo UK operates a grade-based salary framework with broad bands. The salary range shown reflects the approved grade band for this role, or a narrower hiring range published within that band, and is benchmarked against the external market. Exceptions above the standard range are managed through governance controls to protect internal equity.

Are you an experienced security architect ready to lead at the forefront of complex, high-impact programmes?

Do you thrive on shaping secure systems at scale, influencing senior stakeholders, and developing the next generation of security architects?

Leonardo UK is seeking a Principal Security Architecture Consultant to join our Cyber & Security Solutions Division. This is a senior role for proven security professionals who can combine deep technical expertise with consultancy leadership driving secure-by-design outcomes across critical national and defence environments.

You will play a pivotal role in defining security strategy, leading architectural direction, mentoring teams, and delivering customer-facing engagements across complex programmes.

As a Principal Security Architecture Consultant, you will operate at the highest levels of design authority, assurance, and consultancy leadership. You will own security architecture outcomes across multiple engagements while developing internal capability and maintaining strong customer trust.

You’ll work in a collaborative consultancy environment, balancing hands‑on architectural leadership with team development and customer engagement.

Lead customer engagements

• Act as a trusted advisor to senior stakeholders (CIOs, CISOs, Programme Directors)
• Shape customer security strategy, roadmaps, and architectural direction
• Use understanding of customer requirements to shape business winning and bid writing activity
• Lead workshops, risk discussions, and design reviews with authority and confidence

Drive secure architecture at scale

• Define and assure enterprise, solution, and system-level security architectures
• Apply and tailor security frameworks such as NIST, ISO 27001, SABSA and Zero Trust principles
• Ensure systems are secure by design, proportionate, and aligned to mission objectives

Own risk and assurance outcomes

• Lead threat modelling, risk identification, and mitigation strategies across programmes
• Provide authoritative guidance on risk trade-offs and security posture
• Oversee security assurance, accreditation, and compliance activities (e.g., MOD, NCSC)
• Ensure architectural traceability from requirements through to controls and implementation

Develop and lead the security architecture practice

• Mentor, coach, and upskill security architects and consultants
• Define and evolve architectural standards, patterns, and reusable artefacts
• Lead internal capability development, including training and knowledge sharing
• Support recruitment and talent development within the team

This role is suited to experienced and self-driven security leaders who combine deep technical knowledge with strong consultancy and leadership capability.

Core strengths

• Exceptional stakeholder engagement and influencing skills at senior levels
• Strong leadership and mentoring capability with a passion for developing others
• Ability to translate complex technical and security concepts into business outcomes
• Experience leading secure designs within bids and writing technical responses

Desirable experience

• Experience in UK MOD, defence, or national security environments
• Familiarity with secure systems accreditation and regulatory frameworks
• Experience with high assurance or classified systems
• Exposure to digital transformation, cloud migration, or enterprise modernisation

Certifications

We value practical experience, but for this senior role, the following certifications (or equivalent experience) are highly desirable:

Core security architecture

• CISSP, CCSP, SABSA
• UK Cyber Security Council (Secure System Architecture & Design Specialism)

Architecture frameworks

• TOGAF (Certified) or equivalent enterprise architecture framework

This role is subject to…