Principal Consultant; Business Architecture

Amentum is a global leader in engineering, project and programme management, and solutions integration. Built on strong programme and engineering delivery experience, supported by deep specialist capabilities, Amentum is a recognised partner across major UK Government and commercial programmes.

Our Defence & Security business supports the UK Ministry of Defence in delivering their capability and objectives across land, sea, air, and corporate domains. The work contributes directly to national and international security, and our teams take pride in the meaningful impact of what they do. The framework allows our employees to work across a wide range of innovative programmes, providing opportunities to grow their skills and experience.

Our support structures ensure employee wellbeing, professional development, and career progression are prioritised.

People are at the centre of what we do. We offer a competitive package designed to attract and retain talent. In addition to standard benefits, UK employees receive free single medical cover, digital GP services, enhanced family‑friendly policies, employee assistance programmes, and reimbursement for professional development. Our community initiatives include matched‑funding schemes, paid volunteering, and charitable contributions.

We are seeking an experienced Business Architecture Consultant to help clients translate strategic objectives into practical, deliverable change. Working closely with senior client stakeholders, you will design and shape future operating models and business architectures that align strategy, people, processes, technology, data and governance. Supporting clients across the full transformation lifecycle, you'll work from discovery and current‑state assessment through to business case development, implementation planning and delivery support.

You'll also contribute to business growth by supporting bids, proposals and business development activities, helping to shape compelling solutions that address client challenges and deliver measurable outcomes. Experience in business architecture, business analysis or organisational transformation is required, together with a proven ability to bridge the gap between strategic intent and successful delivery.

• Translate business strategy into actionable transformation plans.
• Design Target Operating Models (TOMs), organisational structures and governance frameworks.
• Develop business capability maps, value streams, customer journeys and service designs.
• Analyse business processes, data, systems and operating models to identify opportunities for improvement.
• Produce business cases, implementation roadmaps, benefits frameworks and performance measures.
• Facilitate workshops and engage confidently with stakeholders at all levels.
• Work collaboratively with business analysts, architects, change and delivery teams to deliver successful outcomes.
• Support business development activities, including bids, proposals and client presentations.

• Business Architecture and Target Operating Models
• Business Analysis and Process Improvement
• Capability Mapping and Value Streams
• Organisation Design
• Customer Journey Mapping and Service Design
• Governance and Operating Model Design
• Data, systems and information analysis
• Business Case development and Benefits Realisation
• Roadmap development and transformation planning
• Experience with in Defence, Government, Nuclear or Critical National Infrastructure sectors is desirable. An understanding of Defence organisations, operating environments and ways of working, whether through military service or industry experience, would be advantageous.

Our values are grounded in safety, integrity, inclusion, and diversity. People are central to our business, and we aim to create an environment where everyone can thrive. We promote positive mental health and a strong sense of belonging. We welcome colleagues of all backgrounds and aim to ensure diverse voices are represented and included in our work.

As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.