Executive Team

Darin Hammers has over 30 years’ experience with increasing leadership roles in the medical device industry. Most recently, he served as CEO of DYSIS Medical from September 2018 – December 2022. Before joining DYSIS, Mr. Hammers served as the President and CEO of Cogentix Medical, acquired by Laborie in April 2018. He joined Cogentix’s predecessor company, Uroplasty, as Vice President of Global Sales in January 2013. During his time at Uroplasty, he was promoted to Chief Operating Officer before being named President and CEO in July 2016. Prior to joining Uroplasty, he was Vice President of Sales for Bard Medical Division of C.R. Bard based in Covington, GA, focused on Urology/Gynecology care products. Mr. Hammers also spent more than 12 years with Boston Scientific in various sales leadership positions and six years at ETHICON. He received his bachelor’s degree in Marketing from the University of Southern Indiana, and a master’s in Business Administration from Emory University – Goizueta Business School.

Darren Crow has over 20 years of medical research and development experience. He has been with EGS since 2005 and has held a number of engineering positions at EGS including Director of Research and Development. He has led the development of several EsophyX products through successful introductions. Prior to EGS he held various engineering leadership roles at Plexus/SeaMED Corporation and Siemens Medical. His past development experience includes cardiology, radiation therapy, optical sensing and medical imaging. He holds a BS in Mechanical Engineering from the University of Idaho and a MS in Physics from University of Washington.

Martin Reid has more than 30 years of experience in the healthcare industry. Prior to joining EGS, he held senior sales leadership positions in the GI space with Olympus Corporation of the Americas, Johnson & Johnson, and Given Imaging. Mr. Reid has established a consistent and successful track record of building and leading high-performance sales organizations. His experience includes launching new and paradigm shifting medical technologies, market development, IDN engagement, and Key Account partnerships. Mr. Reid graduated from Whitworth University with a Bachelor’s degree in Business.

Joyce Oldenburg has over 30 years of experience in the human resources field primarily in the healthcare industry.  Prior to joining EGS, Joyce held human resources positions at Quinton Instrument Company (acquired by Tyco Healthcare/Kendall Division) and Plexus Corporation. Joyce joined EndoGastric Solutions in 2005 helping to build EndoGastric Solutions into a world-class organization. Joyce Oldenburg has a Bachelor’s Degree in Psychology from Western Washington University.

John Griffin has more than 25 years of experience in the healthcare industry. Prior to leading the global Education and Training division for EGS, he held front-line and senior level sales, marketing, strategic accounts, and professional education positions with Medline Industries, Johnson & Johnson, and CAE Healthcare. John has a bachelors degree from the University of Illinois, Champaign-Urbana and an MBA from the Lake Forest Graduate School of Management.

Vishnu Venkatesan has over 15 years of experience in quality management system, design quality, risk management, CAPA, complaint handling, supplier quality and manufacturing support. Vishnu has been with EGS since 2018. Prior to EGS he held quality management and quality engineering roles at Creganna Medical, St. Jude Medical and TE Connectivity. Vishnu holds a BE in Mechanical Engineering from the Bharathiyar University, India and a MS in Industrial Engineering from University of Texas at Arlington.