John Grosh is the Deputy for Mission Development in the Computing Principal Directorate at Lawrence Livermore National Laboratory. He is responsible for the program development strategy for emerging opportunities in Computing. In addition, he coordinates program development activities across the major stakeholders within the organization, including the Center for Applied Scientific Computing (CASC), the HPC Innovation Center, and Livermore Computing.    

Prior to his current role, Mr. Grosh was the Department Head for the Computing Applications and Research (CAR) Department. As Department Head, he managed more than 400 computer scientists, engineers, and mathematicians who partner with Laboratory programs to develop software technologies and applications codes in support of Department of Energy missions in defense, energy, and life sciences.

Mr. Grosh joined LLNL in 2006 as the Director of CASC, where he led mission-focused research in computer science, applied mathematics, data analytics, and computational science. During his tenure as director, Mr. Grosh led CASC into new areas of research, including cyber security, data-intensive computing, and uncertainty quantification, and he strengthened basic research in computer science and applied mathematics. In addition, he was instrumental in building new sponsor relationships and programs focused on the Department of Defense (DoD).

From 2000 to 2006, Mr. Grosh served in the Office of the Director of Defense Research and Engineering, where he initiated and oversaw R&D programs in high performance computing, cyber security, and embedded software. He co-chaired the 2003-2004 White House task force on high-end computing, chaired the Interagency Working Group in high-end computing research, led and participated in red teams and technology readiness assessments for major DoD acquisition programs, and formulated government policy in export controls for high performance computing and microprocessors. Prior to joining the Office of the Secretary of Defense, Mr. Grosh worked at the Army Research Laboratory as a program manager in scalable applications software and tools for high performance computers, led scientific visualization research, conducted research in molecular dynamics for detonation physics, and designed and tested novel propulsion systems for tank ammunition.

Mr. Grosh has an M.S. in mathematics from the University of Delaware and a B.S. in chemical engineering from The Pennsylvania State University.