Assistant Manager of Commercial Activities (2-3 Years FTC). Job in London LilyLifestyle Jobs

Great British Energy - Nuclear is an arm's length body of the Department for Energy Security and Net Zero, dedicated to supporting the development and deployment of new nuclear technologies in Great Britain. We play a crucial role in advancing nuclear new build, ensuring the UK's energy security and achieving net-zero carbon emissions. Great British Energy - Nuclear focuses on fostering innovation, facilitating investment, and coordinating efforts across the nuclear industry to build a resilient and sustainable energy future.

Great British Energy - Nuclear's first step was to start the technology selection process for Small Modular Reactors (SMRs) in 2023. SMRs can potentially be quicker to deploy and less expensive to build than traditional nuclear power plants because they are smaller, have factory based modular manufacturing and more flexible deployment options. In June 2025, Great British Energy - Nuclear announced that Rolls‑Royce SMR had been selected as the preferred bidder to build the UK's first SMRs, following a technology selection process that began in 2023.

Great British Energy - Nuclear is aiming to deliver fast, based on a supportive and collaborative culture which values equality and diversity and creates an inclusive workplace. Our activities will be driven by our values, which are:

• Trust – We prioritise safety, we act responsibly and with integrity.
• Collaboration – We work as a team; we value diversity and expertise.
• Challenge – We are curious and courageous in the way we think and act.
• Care – We are thoughtful, inclusive and respectful of others.
• Drive – We get things done and we make a difference.

Are you a commercially astute professional with a strong background in procurement and a passion for working in high‑integrity, safety‑critical environments? We are seeking 2 experienced Assistant Commercial Managers on a 2‑3 year fixed term basis to support procurement and contract management activities within the nuclear sector. With 2‑4 years of relevant experience, ideally in a regulated or infrastructure‑heavy industry, you will play a key role in supplier engagement, supporting the development of sourcing strategies and commercial strategies which meet business needs and deliver opportunities for the development of the nuclear industry. This is a unique opportunity to contribute to nationally significant projects while developing your career in one of the most vital and forward‑looking industries. Due to the various locations of GBE‑N offices, this role can be based in Warrington, London, Angelsey.

Key Responsibilities & Accountabilities

• Procurement & Commercial Strategy: Support the Commercial Manager and Lead in developing procurement strategies, including payment mechanisms, lotting strategies, and market engagement activities.
• Market Analysis & Commercial Intelligence: Conduct market analysis to ensure effective competition and drive value for money in procurement activities.
• Procurement Process Management: Lead and support various stages of procurement, including ITT preparation, evaluation, negotiation, and contract award.
• Governance & Assurance: Ensure procurement activities are controlled and compliant with governance processes, internal policies, and relevant regulations.
• Stakeholder Collaboration: Work closely with business stakeholders, providing commercial guidance and managing the approvals and business case processes.

Knowledge, Skills and Experience required

• Relevant experience in a nuclear, construction, civils, engineering and/or critical infrastructure programme (DESIRABLE)
• Knowledge and experience of working with complex procurements, of a value in excess of 5 million is required (ESSENTIAL)
• Experience of supporting NEC suite of contracts, including drafting and negotiation (DESIRABLE)
• Experience of supporting the delivery of commercial, procurement and contract management activity (ESSENTIAL)
• Proven skills and experience in supporting business case development and working with multiple stakeholders (DESIRABLE)
• Familiarity with working with HMG approvals processes (DESIRABLE)
• Good personal organisational skills, including time management, and ability to meet deadlines and work under pressure within an agile environment (ESSENTIAL)

Please complete our short application form to apply for this role. If shortlisted, one of our Talent Attraction Leads will be in touch to discuss the position in more detail.