Manages the college's Fabrication unit: the Fabrication Shop, Digital Fabrication Lab, and CED’s carpentry and Mechanician programs. Develops fabrication safety and equipment use policies and practices; trains the trainers; responsible for campus, state and federal compliance requirements. Coordinates the internal design-builds in the CED facilities. Coordinates summer workshop program.

Semar graduated from UC Davis in Fine Arts and Art History. In addition to his role at CED, he is a practicing artist specializing in metal fabrication and small metal arts. Besides UC Berkeley, Semar has worked at other educational institutions including the Academy of Art and the California College for the Arts.