Andy Ault

Andy Ault

Senior Vice President – Manufacturing

Primary Responsibilities

Andy is the Vice President of Manufacturing. Andy is responsible for Hemlock Semiconductor’s environment, health, safety, and security operations and is a member of the Operational Leadership Team (OLT).

Experience and Expertise

Andy has almost 30 years of experience manufacturing abroad and in the U.S. He was named Hemlock Semiconductor’s Environment, Health, Safety and Security Operations manager in 2014 and Vice President of Manufacturing in 2019. He came to Hemlock Semiconductor from Dow Corning in 2006 and has held manufacturing leadership positions on improving safety, productivity, reliability, and asset utilization while developing strong teams. In addition, he played key roles in multiple major expansions at the Hemlock site.

Andy started his career at Dow Corning’s Carrollton site in process engineering and manufacturing technical and leadership roles and later served as a program manager in Dow Corning’s Enterprise Portfolio Management Office. He is a Certified Associate Safety Professional (ASP) and a Six Sigma Black Belt.

Andy is active in the community and serves as President of the Board of Directors for the Midland County Emergency Food Pantry Network, Financial Secretary of his church, and volunteers for a variety of organizations in the Great Lakes Bay Region.


  • B.S. Chemical Engineering — Purdue University
  • Six Sigma Blackbelt
  • Certified Associate Safety Professional (ASP)