Wallach retired from Micron, and is currently a guest scientist at LANL (Los Alamos). He is also a visiting scientist at the Barcelona Supercomputer Center (BSC). Main focus on HPC RISC-V technology. Wallach was the co-founder and CTO of Convey Computers. After Micron Technology bought Convey, Wallach became a design director. 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. Prior to that, he was an engineer at
Raytheon, where he worked on the All Applications Digital Computer (AADC). Wallach has 103 American patents and is a member of the
National Academy of Engineering, a
IEEE Fellow and was a founding member of PITAC (The
Presidential Information Technology Advisory Committee). He is currently an adviser to Centerpoint Venture partners,
Sevin Rosen Funds, and Interwest, and a consultant to the
United States Department of Energy Advanced Scientific Computing (ASC) program at
Los Alamos National Laboratory. He donated his personal library of papers and engineering notebooks to the Computer Museum. In 2023 he was interviewed by the ACM History Committee == Awards ==