Lead Enterprise Architect

Mastek Ltd; Reading; On-site; GBP 80,000 - GBP 100,000; Full time

Job summary

A leading digital transformation company is seeking a Lead Enterprise Architect to guide complex programmes in the UK Defence sector. In this role, you will lead architectural design and governance, focusing on digital transformation and secure multi-domain environments. Candidates should have strong experience in Defence IT systems and a deep understanding of enterprise architecture frameworks. Join us to make a significant impact in creating digitized, secure capabilities for Defence stakeholders.

Benefits

Commitment to inclusion

Encouragement of innovation and collaboration

Focus on continuous growth

Qualifications

• Strong experience as a Senior / Lead Enterprise Architect in Defence or high-security government environments.
• Proven delivery of secure, complex digital and IT systems at enterprise scale.
• Deep understanding of enterprise architecture frameworks (e.g., TOGAF).
• Excellent communication and technical writing skills.

Responsibilities

• Lead enterprise architecture across large Defence programmes.
• Provide technical governance and compliance oversight.
• Design and review secure architectures aligned to Defence frameworks.
• Engage with senior stakeholders to influence strategy.

Skills

Enterprise architecture frameworks (e.g., TOGAF)

Cloud technologies

Cybersecurity

Integration technologies

Technical writing

Team leadership

Stakeholder engagement

Job description

Shape national‑scale digital transformation. Architect secure, mission‑critical Defence systems.

We’re seeking an experienced Lead Enterprise Architect to lead complex programmes across the UK Defence sector, with a focus on digital transformation, cloud adoption, data and content distribution, and secure multi‑domain environments.

This role combines architecture leadership, technical governance, and strategic influence — working closely with Defence stakeholders to deliver secure, scalable, and future‑ready digital capabilities.

What You’ll Be Doing

• Lead enterprise architecture across large, complex Defence programmes.
• Provide technical governance, solution assurance, and compliance oversight.
• Shape enterprise strategies, technology roadmaps, and architectural standards.
• Design and review secure architectures aligned to Defence and government frameworks.
• Produce high‑quality architectural artefacts (HLDs, LLDs, models, assurance packs).
• Lead and mentor small technical teams working in client‑facing environments.
• Engage with senior stakeholders to influence strategy and solution outcomes.
• Support bids, proposals, and business cases for new Defence programmes.

What You Bring

• Strong experience as a Senior / Lead Enterprise Architect in Defence or high‑security government environments.
• Proven delivery of secure, complex digital and IT systems at enterprise scale.
• Experience across cloud, cybersecurity, integration, and deployable technologies.
• Deep understanding of enterprise architecture frameworks (e.g. TOGAF).
• Familiarity with Defence frameworks (desirable).
• Excellent communication and technical writing skills for governance boards and bids.
• Comfortable leading teams and operating across multi‑supplier environments.
• SC clearance (or eligibility) is preferred.

Why Join Us?

• We’re a purpose‑driven organisation committed to creating positive impact and championing inclusion.
• You’ll join a culture that encourages innovation, collaboration, and continuous growth.
• We celebrate difference and believe diverse perspectives lead to stronger solutions.
• Even if you don’t meet every requirement, we encourage you to apply — great talent comes from a variety of backgrounds.
• Your lived experience, unique strengths, and personal story matter — they help us design better outcomes for the communities we serve.

Ready to Make an Impact?

📩 Apply now and help us build a more inclusive, digitally empowered future.