Dr Peter Haigh is a renowned expert in reactor physics, core design, and analytical engineering, boasting over 20 years of diverse industry and academic experience.

He began his illustrious career as a post-doctoral researcher in Nuclear Structure at the University of Birmingham before joining Rolls-Royce. There, he played an instrumental role in pioneering the next generation of reactor cores powering nuclear submarines. His remarkable contributions led to his rapid promotion to Technical Lead, where he spearheaded the teams that designed and delivered the first new UK naval reactor core in over 20 years. Concurrently, he managed the Reactor and Operational Physics team—a group of more than 20 professionals dedicated to the full CADMID cycle across four generations of nuclear reactors. The team's multifaceted responsibilities included core design and analysis, conducting experiments on nuclear test reactors, developing and qualifying in-house physics codes, and ensuring fuel operations met stringent safety standards against criticality risks. He also drove advancements in reactor physics, experimental techniques, and criticality safety research.

After more than five years in this capacity, Dr. Haigh advanced to the role of Specialist in Reactor Physics and Core Design. In this position, he provided strategic leadership and technical direction across the physics discipline and the broader company. As a key member of the management team for the Analytical and Whole Plant Engineering Business Unit—comprising over 250 employees—he set the vision and strategy for high-profile projects, architected complex technical developments, and navigated challenging technical obstacles. His role extended to managing collaborations with customers, external organisations, and universities, as well as advising on the recruitment and development of top-tier talent within the field. Among his many achievements, he led the delivery of two high-fidelity 3D reactor physics codes integrated into a new Core Analysis Method, initiated and delivered a groundbreaking methodology for modeling stochastic neutron behavior during reactor startup and led work on quantifying and reducing uncertainties to enhance core performance. Notably, he was an integral part of an award-winning collaboration with the UK Ministry of Defense and U.S. counterparts that contributed to the innovative solution that paved the way for the AUKUS agreement.

Dr. Haigh later joined MoltexFlex as a Specialist, where he was pivotal in designing and implementing the molten salt FLEX thermal reactor and waste-burning fast reactor concepts. Before his current role at Cambridge AtomWorks, he completed a 10-month secondment at Amentum, where he developed bespoke Monte Carlo modeling capabilities within a complex toolset.