Business Case Lead / Business Case Manager - Defence Full-Time

The world is changing, and we have a responsibility to support that change, helping drive it and be part of it.

Through the commitment, capability and care our team brings, we build trust between clients, suppliers, governments, and society. Delivering better outcomes that have a positive impact on the world around us.

We work smarter to face the challenges of the future; bringing the clarity that helps teams realise their full potential across the defence, real estate, infrastructure, and natural resources sectors.

It’s how we’ve made the difference for 75 years. Transforming performance for a green, inclusive, safe and productive world.

At Turner & Townsend we are passionate about making the difference. That means delivering better outcomes for our clients, helping our people to realise their potential, and doing our part to create a prosperous society.

We provide Programme Management & Delivery, Commercial, Procurement and Cost Management Services to a wide range of clients out of over 110 offices worldwide, operating in various sectors including Defence, National Security, Government, Rail, Utilities, Transport, Education, Local Authorities and Health.

Important: Before applying, due to the sensitive nature of these projects, you must be a SOLE UK National who is able to achieve and maintain UK MoD Security Clearance (SC). See Security Clearance Section.

Job Description

We have an exciting opportunity for an experienced Business Case Lead / Manager with proven expertise in the HM Treasury ‘Green Book’ to join our growing Defence North team.

In this role, you will support clients in the delivery of industry-leading Business Case management services across a diverse portfolio of major programmes and projects within the Defence, Nuclear, Construction and Infrastructure sectors . Our projects span the North of the UK, including the Midlands, Cumbria, the North East and Scotland, with opportunities to support programmes across the wider UK.

The team is made up of over 70 people with our central office in Manchester; however, we have team members based all over the North of the UK such as Nottingham, Leeds, Barrow, and Glasgow.

Due to the complexity and scale of our projects, we are seeking Business Case authors and professionals with demonstrable experience of working within project and programme delivery environments and a strong background in the Green Book five-case model .

Experience within the Defence, Nuclear, Infrastructure or Construction sectors is highly desirable.

A key aspect of this role is the opportunity to work alongside our clients on site, fostering strong partnerships and delivering successful outcomes through face-to-face collaboration. As such, regular UK travel and overnight stays should be anticipated.

Main Purpose of Role

We are seeking an experienced Business Case Author / Lead with strong MOD and HM Treasury expertise to support the delivery of major projects and programmes across the Defence, Nuclear, Infrastructure and Construction sectors.

As part of our Defence North team, you will work closely with clients, major programmes and project delivery teams to generate successful business cases for HM Treasury approval at a business with a governmental level of scrutiny and approval. The role will see your talents manage the business and financial processes of the team, provide insightful analysis, and support informed decision-making throughout the lifecycle of the model through to submission, successful approval and beyond. You will be expected to lead activities, ensuring our best work is delivered for clients through delivering practical solutions that enhance certainty, performance and successful outcomes from all proposals.

Key Responsibilities

Business Case Identification and Assessment

• Facilitate teams and workshops with project and programme teams.
• Ensure all business case information and its subsequent proposals is captured in a structured, consistent and auditable manner.

Business Case Management

• Develop and maintain effective strategies, plans and processes whilst generating successful business cases.
• Support the development and implementation of business case strategies on behalf of our clients and key stakeholders.
• Monitor the effectiveness of risk treatments and provide recommendations for continuous improvement throughout the lifecycle of any business case prior to submission.
• Maintain accurate and up-to-date portfolios using recognised methodologies and management software for business case generation.
• Produce high-quality outputs, and management information tailored to stakeholders needs to ensure success upon submission.
• Present your products and recommendations to clients and senior leadership, to enable informed decision-making.

Stakeholder Engagement

• Build strong working relationships with our clients, programme and project managers, planners, cost managers and all key stakeholders.
• Facilitate collaborative discussions to improve business case awareness and promote proactive developments of the team for our clients.
• Support clients in embedding best-practice five-case model principles aligned to organisational and programme requirements.

Qualifications

We are looking for individuals who can fully demonstrate the following capabilities:

• Experience working within project or programme environments in the Defence, Nuclear, Infrastructure or Construction sectors .
• Strong understanding of the ‘Green Book’ approvals and the five-case model, preferably within the MOD and wider HM Treasury organisations where applicable.
• Strong understanding of the interfaces between Business Case Generation, Planning, Cost Management and Change Management disciplines.
• Excellent stakeholder engagement, communication, facilitation and reporting skills.
• Ability to work both independently and collaboratively within multi-disciplinary project controls teams.
• Experience supporting major infrastructure, Defence, nuclear or capital delivery programmes.
• Familiarity with project lifecycle methodologies such as RIBA, TEPIDOIL, GRIP/PACE, CADMID, or equivalent sector-specific frameworks.
• Professional qualifications such as:
• Infrastructure Business Cases Certification (APMG)
• Better Business Cases Certification (APMG)
• Managing Successful Programmes (MSP) qualification
• APM Project Management Qualification (PMQ)

Additional Information

Working in teams/ Office & Site attendance

Turner & Townsend recognises the importance of helping its employees harmonise their work and home life by offering hybrid working, that enable them to balance their working life with other priorities. At the same time T&T recognises that employee office and site attendance must always remain in line with the demands of the business and clients. Currently, we anticipate you being on client sites or Turner & Townsend offices 60% of your time, but this may flex depending on client and business requirements. The office is not the only place work gets done, but it is increasingly important for teams to be stronger together by learning, collaborating, and creating amazing work together.

Security Clearance

Important: Before applying, due to the sensitive nature of these projects, you must be a SOLE UK National who is able to achieve and maintain UK MoD Security Clearance (SC)
Many of the clients and projects we support are subject to MoD security clearance and Trade Control restrictions. This means that your eligibility for certain roles may be affected by your place of birth, nationality, time out of country, current or former citizenship, and any residency you hold or have held. Further details are available at United Kingdom Security Vetting: clearance levels - GOV.UK (

Values & Behaviours

The successful candidate will demonstrate behaviours that are consistent with the T&T Value and Behaviours Model

• Love a challenge.
• We love a challenge, and we work hard to make change happen and see things through. We don’t stand still, challenging ourselves and others to do better every day . And we are trusted to do the right thing, raising standards all the time.

Stronger together

We’re stronger together by connecting people in diverse teams, so that we can all collaborate to deliver our best work . We focus on what matters and use our influence to build a better world for everyone.

Bring out the best in everyone.

We bring out the best in everyone. We help each other to make the most of our potential, always learning from our experience. We treat each other with care and respect and make time to give everyone a voice.

Our inspired people share our vision and mission. We provide a great place to work, where each person has the opportunity and voice to affect change.

We want our people to succeed both in work and life. To support this we promote a healthy, productive and flexible working environment that respects work-life balance.

Turner & Townsend is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees and actively encourage applications from all sectors of the community.

Please find out more about us at

SOX control responsibilities may be part of this role, which are to be adhered to where applicable.

Business Case Lead / Business Case Manager - Defence Full-time • Nottingham, ENG, GB

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