Troy Terwillegar currently serves as the site manager at MSU St. Andrews. Terwillegar came to St. Andrews in 2010 as building manager when the facility was home to the Michigan Molecular Institute (MMI).

In his current position, Terwillegar oversees all aspects of building maintenance and remodeling and is also responsible for the equipment at MSU St. Andrews.

Troy is an experienced project manager, mechanic, craftsman, and entrepreneur. Troy was employed at Enbridge from 2008 to 2010, and was the owner of a refinishing shop and several other successful small businesses.

Since 2018, Troy has supported the MSU St. Andrews research projects by housing a honey bee colony at his property for observation.