Owen R. Greulich, M.E., P.E., is a mechanical engineer currently employed as Pressure and Energetic Systems Safety Manager in the Office of Safety and Mission Assurance at NASA Headquarters. His current responsibilities include safety of pressure and vacuum systems while prior work included project management of pressure systems design and implementation, major wind tunnel modifications, fabrication of research hardware, and construction of test stands.

Mr Greulich is responsible for the development and quality of a number of internal standards, including review of standards in a wide range of engineering fields. He is active on the High Pressure Task Group of the American Society of Mechanical Engineers (ASME) Process Piping Code Committee and American Institute of Aeronautics and Astronautics (AIAA) committees on aerospace pressure systems standards. He is Chair of the Fatigue and Fracture subcommittee for aerospace pressure vessels.

Prior to his employment at NASA, Mr Greulich worked in the private sector, designing and managing construction of pressure and vacuum systems and other specialized fabricated and machined hardware. His publications include work on integrity of wiring in aerospace applications, studies regarding rocket propellant safety, and composite structures.

Mr Greulich received his Master of Engineering degree in Mechanical Engineering at the University of California in 1979. He is a registered professional engineer in the State of California.

Maan H. Jawad, PhD, P.E., is President of Global Engineering & Technology (GE&T). GE&T performs engineering consulting to the pressure vessel industry as well as the power, petrochemical, and nuclear industries. Prior to this, Dr Jawad was on the board of directors and was Director of Engineering of the Nooter Corporation where he was employed from 1968 until he retired in 2002.

Dr Jawad has been active on various technical committees of the ASME Boiler and Pressure Vessel Code since 1972 and has served on numerous committees as a member and chairperson. He was appointed by the Governor of Missouri to the Missouri Board of Boiler and Pressure Vessel Rules and served from 1998 to 2005. He was also a member of the advisory board to the National Board of Boilers and Pressure Vessel Inspectors in Columbus, Ohio, representing The American Boiler Manufacturer's Association from 2000 to 2005.

Dr Jawad obtained his PhD in Structural Engineering from Iowa State University in 1968. He has authored and coauthored five technical books related to pressurized equipment, two of which have been translated into Chinese. He has also authored and coauthored numerous technical research papers in the field of pressure vessels.

Dr Jawad has taught graduate and undergraduate level engineering courses at various universities in topics such as Theory of Plates and Shells, Finite Element Analysis, Advanced Structural Analysis, and Plastic Design. He is a registered professional engineer in the State of Missouri, a Fellow of the ASME, and a member of the American Society of Civil Engineers.