John E. Williams
Executive Vice President and General Manager,
Photonics Solutions Division (PSD)

Mr. Williams serves as the Executive Vice President and General Manager, Photonics Solutions Division of MKS Instruments, Inc. Mr. Williams joined MKS in February 2019 with the acquisition of Electro Scientific Industries, Inc., where he held the position of Vice President of Marketing since February 2017. He previously served at MKS as Vice President and General Manager, Equipment Solutions Division/Business from April 2020 to May 2024.

Prior to joining MKS, Mr. Williams was Vice President of Corporate & Strategic Marketing at FEI, which became part of Thermo Fisher Scientific in 2016. Earlier in his career, Mr. Williams held various marketing and product management positions at leading capital equipment companies such as Lam Research and Brooks Automation.

Mr. Williams holds a B.S. in Mechanical Engineering from California Polytechnic State University – San Luis Obispo.