This panel session will compare contracting methods / models of the UK NDA and the US DOE. Each organization spends between $5bn and $6bn a year on their respective missions, which are similar in many respects, and recognizes the importance of engagement with the supply chain. The audience will gain an understanding of what has worked well and what challenges have had to be overcome to meet the respective critical clean-up milestones. In addition, many companies either work in or are considering working in both markets, and the panel will address the lessons learned on this and how to make this a success.