Steven "Steve" J. Wallach, born Brooklyn, NY, September 1945, is currently an adviser to Centerpoint Venture partners, Sevin-Rosen, and Interwest, and a consultant to the United States Department of Energy Advanced Scientific Computing (ASC) program at Los Alamos. Wallach was previously Vice President of technology for Chiaro Networks and was co-founder of Convex Computer, their Chief Technology Officer and Senior V.P. of Development.

After Hewlett-Packard bought Convex, Wallach became the chief technology officer of Hewlett-Packard's large systems group. He was also a visiting professor at Rice University from 1998-1999. Prior to Convex, he was manager of Advanced Development for Data General. His efforts on the MV/8000 are chronicled in Tracy Kidder's Pulitzer Prize winner The Soul of a New Machine. Wallach has 33 patents and is a member of the National Academy of Engineering, an IEEE Fellow and was a founding member of PITAC, (The Presidential Information Technology Advisory Committee).

Wallach was awarded the 2008 Seymour Cray Computer Science and Engineering Award for his "contribution to high-performance computing through design of innovative vector and parallel computing systems, notably the Convex mini-supercomputer series, a distinguished industrial career and acts of public service."