Key Account Manager

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, helping position Assystem as a key delivery partner for these transformative technologies. Reporting to our Key Account Director New Build, you will be responsible for leading key account plans and supporting growth strategy in collaboration with the wider Business Unit team and other business units. Your role:

• 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
• Developing and growing the business with the skills to identify and develop new customer opportunities
• Represent Assystem at senior client engagements and industry events
Why Apply? 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.


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