Biography

Mr. Mazelsky has served as Executive Chair of IDEXX Laboratories, Inc. since May 2026. He previously served in various other roles at IDEXX, including President and CEO from October 2019 until May 2026, Interim President and CEO from June 2019 to October 2019, and Executive Vice President from August 2012 to June 2019. Before joining IDEXX, Mr. Mazelsky was a Senior Vice President and General Manager from 2010 to 2012 of Computed Tomography, Nuclear Medicine and Radiation Therapy Planning at Philips Healthcare, a subsidiary of Royal Philips Electronics (now named Royal Philips). Previously he held a series of other leadership roles with increasing responsibilities during his tenure at Philips beginning in 2001. Prior to joining Philips, Mr. Mazelsky was at Agilent Technologies, where he was an Executive in Charge from 2000 to 2002, leading the integration of Agilent’s Healthcare Group into Philips. He also served as a General Manager of the Medical Consumables Business Unit at Agilent Technologies from 1997 to 2000. From 1988 to 1996, Mr. Mazelsky held a number of roles at Hewlett Packard in finance, marketing and business planning. Mr. Mazelsky serves on the Board of Directors of Insulet Corporation. Mr. Mazelsky holds an undergraduate degree in Mathematics from the University of Rochester and an MBA from the University of Chicago.