Account Manager

Job Summary

Join the Fusion and Modular Nuclear Business Unit! As a Key Account Manager within our Nuclear New Build Business Unit, you will play a strategic role in developing and managing customer accounts within the Fusion and Modular Nuclear sector, covering a wide range of customer and technologies. You will focus on building trusted relationships with leading stakeholders and positioning Assystem as a key delivery partner for these transformative technologies.

• Manage relationships with existing and new strategic external clients
• Ensure sales order targets are achieved
• Update and champion CRM records to reflect current opportunities
• Provide accurate forecasting and bid tracking
• Maintain and deliver key account development plans
• Drive the capture of strategic, high‑value opportunities
• Support internal strategic planning across the BU
• Develop and grow the business, identifying new customer opportunities
• Represent Assystem at senior client engagements and industry events

• Ideally degree qualified (in engineering, science, business or a related field)
• Previous experience in account management or business development
• Proven track record of success with strategic clients and complex accounts
• Strong experience in CRM systems and forecasting tools
• Excellent communication, stakeholder management/engagement and negotiation skills
• Strategic and analytical mindset
• Ability to work autonomously and collaboratively within a matrix organisation

• Experience in the nuclear, energy, infrastructure or oil & gas sectors
• Familiarity with gated bid and review processes
• Understanding of fusion and modular reactor market landscape
• British nationality is preferred (due to security clearance requirements)

• Pension scheme (8% company contribution / 4% personal contribution)
• 25 days paid annual leave plus bank holidays, with option to buy or sell days
• Professional fees reimbursed
• Flexible working
• Employee referral scheme

Join Assystem and become a key player in delivering critical nuclear projects that shape the future of energy. Embrace this opportunity to excel in a dynamic environment where your expertise and leadership will drive global innovation. Work on innovative energy projects, including SMR, AMR, fusion, and modular nuclear, alongside top industry professionals and contribute to a sustainable future.

Notice to candidates on recruitment fraud:
We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. We will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.

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.