Dr. Stephan Carroll is a Principal Consultant within the Digital Systems Assurance Group of Frazer-Nash. He was originally a Royal Air Force Regiment Officer and following his service studied Aerospace Engineering and gained his PhD in control systems. He has worked extensively in Safety Critical Systems Design and Assurance in the Air Domain, in Ships, and Submarines for ORMs and Governmental Organisations. Recently, he has been active in sybmaritne control systems, submarine safety, and cyber-security related safety in the air domain.