Sir Stephen Augustus Lovegrove is the Company Chair at Rolls-Royce SMR. In this role, he contributes to the company's initiatives, which are focused on Small Modular Reactors (SMRs).

Prior to his current position, Lovegrove had a distinguished career as a British civil servant. He served as the UK National Security Adviser from March 2021 to September, a key role in the British government's national security apparatus.