Amentum are the Design and Engineering partner for Sellafield under the PPP (Programme and Project Partners). This is a 20-year arrangement to deliver ~£7bn of major projects. We are looking to recruit high value expertise from across regulated and comparable sectors to work in a collaborative environment. PPP is delivering major projects, site wide improvements and provision of supporting services. We provide the front end design and engineering capability across the PPP portfolio. Being part of the PPP Team offers a unique opportunity to drive change and innovation in engineering, safety and delivery solutions in one of the most complex industrial sites in the UK if not the world. We are looking for people who are passionate about developing themselves and in meeting new challenges. We have an exciting opportunity for a Cost and Assurance Accountant to join the team in Birchwood Park, Warrington. Main duties and responsibilities could include: * Understand and ensure compliance with the Contract actual cost accounting requirements, Ensure our finance operating processes, accounting standards and governance are followed * Participate in preparation of monthly application for payment to the Client in line with contract T&C and assist in development and maintenance of Application for Payment/cost database * Raise sales invoices based on approved payment certificates * Oversee timely processing and payment of supplie...