From his bio on the GF website:

Dr. Thomas Caulfield is the chief executive officer of GLOBALFOUNDRIES, effective March 9, 2018.  Prior to being named CEO, Tom was senior vice president and general manager of the company’s latest leading-edge 300mm semiconductor wafer manufacturing facility (Fab 8), located in Saratoga County, NY. Caulfield, who joined the company in May 2014, leads the operations, expansion and ramp of semiconductor manufacturing production at Fab 8, where GLOBALFOUNDRIES supports customers on the world’s most advanced semiconductor manufacturing technology platforms including 28 nanometer (nm), 20nm, and 14nm.

Caulfield brings a track record of results through an extensive career spanning engineering, management and global operational leadership with leading technology companies. Most recently, Caulfield served as president and chief operations officer (COO) at Soraa, the world’s leading developer of GaN on GaNTM (gallium nitride on gallium nitride) solid-state lighting technology. Prior to Soraa, Caulfield served as president and COO of Ausra, a leading provider of large-scale concentrated solar power solutions for electricity generation and industrial steam production. Before that, Caulfield served as executive vice president of sales, marketing and customer service at Novellus Systems, Inc.

Prior to that, Caulfield spent 17 years at IBM in a variety of senior leadership roles, ultimately serving as vice president of 300mm semiconductor operations for IBM’s Microelectronics Division, leading its state-of-the-art wafer fabrication operations in East Fishkill, NY.