John Reifenberg

John Reifenberg is an accomplished engineering and technology professional with extensive experience in leadership and process development across various industries. As the Director of Technology - Entrepreneurship at Sierra Nevada Corporation since February 2020, Reifenberg leverages significant expertise gained from previous roles, including Scientist V/Program Manager at L3Harris Technologies and Director of Process Engineering at Velo3D. Notably, Reifenberg held multiple positions at Alphabet Energy from 2012 to 2017, culminating in the role of Vice President of R&D/Process Development. Earlier career highlights include serving as a Senior Process Engineer at Intel Corporation, focusing on electron-beam lithography and photomask technology. Academic qualifications include a Ph.D. and M.S. in Mechanical Engineering from Stanford University, along with a Bachelor of Science in Mechanical Engineering from Carnegie Mellon University.