Management Team

John A. Roush

Chief Executive Officer and Director

Executive Officer Since: December 2010

Mr. Roush has served as the Company's Chief Executive Officer and as a member of the Board of Directors since December 2010. Mr. Roush joined the Company after a twelve-year career with PerkinElmer, Inc., where he was a corporate officer and served in several senior leadership positions, including President of the Environmental Health business. Before joining PerkinElmer, Mr. Roush held management positions with Outboard Marine Corporation, AlliedSignal, Inc. (now Honeywell International), McKinsey & Company Inc., and General Electric. Mr. Roush holds a B.S.E.E. from Tufts University and an M.B.A. from Harvard University.


Deborah A. Mulryan

Vice President, Human Resources

Executive Officer Since: September 2011

Ms. Mulryan has served as the Company's Vice President, Human Resources since September 2011. Prior to joining the Company, Ms. Mulryan served for almost thirty years in various human resources and strategic planning leadership roles. Ms. Mulryan joined the Company from Sycamore Networks, Inc. where she served as the Vice President of Human Resources (2008-2011). Previously, she held senior Human Resources roles for Cantata Technology (2006-2008), MatrixOne, Inc. (2004-2006), Analog Devices, Inc. (1997-2004) , and Fidelity Investments (1992-1997).   Ms. Mulryan holds B.S.B.A and M.B.A. degrees from Northeastern University. 


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.