Management Team

John A. Roush

Chief Executive Officer and Director

Executive Officer Since: December 2010

Mr. Roush was appointed the Company’s Chief Executive Officer and elected as a member of the Board of Directors on December 14, 2010. Mr. Roush joined the Company after a twelve year career with PerkinElmer, Inc. (“PerkinElmer”), a provider of technology and services to the diagnostics, research, environmental, safety and security, industrial and laboratory services markets, where he was a corporate officer and served in several senior leadership positions. From 2009 to December 2010, Mr. Roush served as president of PerkinElmer’s Environmental Health business. From 2004 to 2009, Mr. Roush led PerkinElmer’s Optoelectronics business unit, which supplies specialty photonics products to biomedical and industrial OEMs. From 1999 to 2004, Mr. Roush served in various general management roles within the Optoelectronics business unit. Prior to joining PerkinElmer, Mr. Roush held management positions with Outboard Marine Corporation, AlliedSignal, Inc., now Honeywell International, McKinsey & Company Inc. and General Electric. Mr. Roush also has served as a member of the board of directors of Lemaitre Vascular, Inc. (NASDAQ: LMAT), a global provider of medical devices and implants for the treatment of peripheral Vascular disease, and as a member of its Audit Committee, since April 9, 2014.


Robert Buckley

Chief Financial Officer

Executive Officer Since: March 2011

Mr. Buckley has served as the Company's Chief Financial Officer since March 2011. Prior to joining the Company, Mr. Buckley served for ten years in various financial positions at PerkinElmer, Inc., including Vice President and Chief Financial Officer of its Environmental Health business and Chief Financial Officer of the Asian operations. Prior to joining PerkinElmer, Mr. Buckley held management positions with Honeywell International, Inc. (formerly AlliedSignal, Inc.) and Georgeson & Company, Inc. Mr. Buckley holds a B.A. in Finance from Manhattanville College and an M.B.A. from U.C.L.A.


Matthijs Glastra

Group President of Medical Technologies and Laser Products

Executive Officer Since: September 2012

Mr. Glastra joined the company in 2012 after a highly successful 18-year career with Phillips, where he most recently served as CEO of Philips Entertainment Lighting. He previously served as Chief Operating Officer of Philips Lumileds, and general manager of various Philips business units including Philips LCD Backlighting and Philips Semiconductors. He also served as Director of Corporate Strategy in the Philips corporate headquarters. Mr. Glastra holds a Master of Science Degree in Applied Physics from Delft University of Technology, as well as an Advanced Engineering Degree in Applied Physics and Electronics from ESPCI in Paris, France, and an MBA from INSEAD.


Peter Chang

Vice President, Corporate Controller and Chief Accounting Officer

Executive Officer Since: August 2011

Mr. Chang has served as the Company's Corporate Controller and Chief Accounting Officer since August 2011. Prior to joining GSI Group, he worked at EMD Millipore (formerly known as Millipore Corporation) as the Assistant Corporate Controller (2007-2011) and earlier as the Director of Financial Reporting. Prior to that, he was in the Audit and Assurance Services practice of PricewaterhouseCoopers LLP in Boston, Massachusetts (1995–2005), most recently as a Senior Manager.  At PricewaterhouseCoopers, he managed and coordinated audit and advisory services to several multinational corporations in a variety of industries. Mr. Chang is a Certified Public Accountant.