About Assystem

At Assystem, our mission is to accelerate the global energy transition. Our 8,000 Switchers blend world-class engineering expertise with digital innovation to shape the future of low-carbon power. Join us as we deliver pioneering nuclear and energy projects that make a real global impact.

Why Join the Community of Switchers?

By joining Assystem, you’ll be part of one of the top three largest independent nuclear engineering companies worldwide. You will work on major projects that redefine what’s possible in nuclear and energy infrastructure, alongside a community of experts committed to advancing the future of clean energy.

The Role

We’re looking for a dynamic Business Development Director to lead and grow strategic client relationships, identify new business opportunities, and drive Assystem’s market position within the UK and global energy sectors. This senior role is critical to shaping our business strategy, expanding our client network, and ensuring our continued success in a rapidly evolving low-carbon landscape. The role can be based from any of our UK offices, but will require a degree of travel across the UK and occasionally internationally. 

Key Responsibilities

• Develop and implement comprehensive sector and market plans to support strategic growth.

• Build and maintain relationships with key clients, partners, and industry stakeholders.

• Identify new business opportunities and lead proactive pursuit activities across energy sectors.

• Collaborate with internal teams to align business development initiatives with delivery capability.

• Lead and contribute to bid strategies, ensuring competitive positioning and client alignment.

• Manage strategic accounts to ensure profitability and long-term partnership value.

• Represent Assystem at industry events and contribute to thought leadership through publications and presentations.

• Stay informed of market trends, emerging technologies, and policy developments to inform business strategy.

About You

• Proven track record in business development or client relationship management, ideally within the energy, engineering, or infrastructure sectors.

• Strong understanding of market dynamics and strategic planning.

• Skilled in building partnerships and influencing at senior stakeholder level.

• Experience leading bids, proposals, and capture plans for complex technical projects.

• Commercially astute, with a focus on achieving sustainable and profitable growth.

• Excellent communication, negotiation, and presentation skills.

• A collaborative leader who thrives in a fast-paced, purpose-driven environment.

If you’re ready to help shape the future of low-carbon energy and play a pivotal role in Assystem’s growth journey, we’d love to hear from you.

Apply now and become a Switcher. Together, let’s engineer a cleaner, brighter future.

Why Join the Community of Switchers?

Join one of the top three largest nuclear engineering companies globally and be a part of a dynamic team driving energy transition. At Assystem, we offer a multicultural environment, career progression opportunities, and the chance to work on industry-leading projects that make a real difference in the world.

Please be aware that many roles at Assystem are subject to both security and export control restrictions.

These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation.

All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.