Matthijs Glastra has been hired as group president of GSI Group Inc.’s Laser Products Div. A longtime Philips executive, he was expected to join GSI in the fourth quarter and to be based at the company’s Santa Clara, Calif., site. The company also announced the departure of corporate officer Dave Clarke, effective Sept. 28. Clarke spent 18 years with GSI, including 14 years as president of Synrad, its industrial CO2 laser business. GSI Group, of Bedford, Mass., designs and manufactures laser-based products, and precision motion and optical technologies for the industrial, electronics, medical and scientific markets.