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 serves as a director 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. Mr. Roush holds a Bachelor of Science degree in Electrical Engineering from Tufts University and M.B.A. from Harvard University. As the Company’s Chief Executive Officer, Mr. Roush provides an insider’s perspective in Board discussions about the business and strategic direction of the Company.


Robert Buckley

Chief Financial Officer

Executive Officer Since: March 2011

Mr. Buckley was appointed the Company’s Chief Financial Officer on March 31, 2011. Prior to joining the Company in February 2011, Mr. Buckley had a ten year career PerkinElmer, Inc., a provider of technology and services to the diagnostics, research, environmental, safety and security, industrial and laboratory services markets, where he served in several financial positions of increasing responsibility. From September 2008 to February 2011, Mr. Buckley served as Vice President and Chief Financial Officer of PerkinElmer’s Environmental Health business. From September 2005 to September 2008, Mr. Buckley was Chief Financial Officer of PerkinElmer’s Asian operations. From April 2001 to August 2005, Mr. Buckley served in a variety of financial management roles at PerkinElmer. 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 University of California Los Angeles (U.C.L.A.).


Matthijs Glastra

Chief Operating Officer

Executive Officer Since: September 2012

Mr. Glastra was appointed the Company’s Chief Operating Officer on February 26, 2015. Prior to that, he served as the Company’s Vice President and Group President of Laser Products since October 15, 2012. Mr. Glastra joined the Company in 2012 after an 18-year career with Philips, a technology company, where he most recently served as Chief Executive Officer of Philips Entertainment Lighting from June 2012 to October 2012. He previously served as Chief Operating Officer and Executive Vice President of Worldwide Operations of Philips Lumileds from July 2007 to June 2012, and held multiple general manager positions at various Philips business units, including Philips LCD Backlighting and Philips Semiconductors, from March 2001 to July 2007. He also served as Director of Corporate Strategy in the Philips corporate headquarters from January 1999 to March 2001. He started his career at Philips as product manager of Computed Tomography in the Philips Healthcare division in October 1994. 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 in Fontainebleau, France.


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.


Brian Young

Vice President, Human Resources

Executive Since: April 2015

Mr. Young joined GSI in April 2015 as Vice President of Human Resources. Mr. Young brings more than 20 years of human resources leadership experience in both public and private companies. His previous roles include Global Human Resource Leader for Hollingsworth & Vose Company and Vice President & Human Resource Officer for CIRCOR International, Inc. (NYSE: CIR). In addition, Mr. Young served in leadership roles with Lake Region Medical (formerly Accellent, Inc.). Mr. Young’s early career experience was in General Human Resource Management with a specialization in Training and Development. Mr. Young holds a B.Sc., Administration of Justice from the school of Liberal Arts, the Pennsylvania State University.