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United States // Management & Directors

Management & Directors


Executive Management

Image of John Onopchenko

John Onopchenko joined us in October 2017 as Chief Operating Officer. With almost thirty years of experience in medical devices, John most recently served as Executive Vice President for Acutus Medical. In 2013, after a decade on the Board of Directors of Volcano Corporation, John stepped off the Board, joined the leadership team and ultimately became the company’s Chief Operating Officer. After Phillips acquired Volcano in March 2015, John was retained by Philips as Senior Vice President and Head of Therapy Strategy. Prior to Volcano John, was a founder and Managing Director of Synergy Life Partners, a medical device venture capital firm. The previous 20 years of John’s career included increasing leadership responsibilities at Johnson & Johnson and GE Healthcare. John received his Bachelors of Science degree from Ursinus College and his MBA from the University of Chicago.

Image of Vaseem Mahboob

Vaseem Mahboob joined in October 2015. Prior to joining Endologix, Mr. Mahboob served in several financial leadership positions at GE Healthcare, a worldwide leader in medical device development and distribution. His most recent role was Chief Financial Officer of their Global IT business. Prior to this position he was the Chief Financial Officer of their Eastern and African Emerging Markets where he oversaw financial operations for medical device distribution sales and service spanning 84 countries and four zones including Russia, Turkey, Middle East and Africa. Prior to this role, Mr. Mahboob was Chief Financial Officer of GE Healthcare's Global Ultrasound Business that is the most global and profitable within GE Healthcare.  Mr. Mahboob also served as CFO of GE Healthcare's Global Magnetic Resonance (MRI) Business, along with several other global financial leadership positions. Mr. Mahboob received a B.A. in Engineering from Bangalore University, and a Masters of Business Administration (MBA) in Financial Markets and Institutions & Information Systems from State University of New York, Buffalo, NY. He is also a graduate of GE's highly regarded internal corporate audit staff where he was a senior audit manager.

Image of Michael Chobotov, PhD

Michael V. Chobotov, Ph.D. joined us in February 2016 in conjunction with the merger of TriVascular.  He co-founded TriVascular as President and CEO in 1998, while creating the foundation for polymer endograft technology. He led the company’s spin-off from Boston Scientific Corporation in 2008, and continued to serve as President/CEO and member of the board of directors until 2012. Prior to co-founding TriVascular in 1998, Dr. Chobotov co-founded TransMotive Technologies, an engineering and product development consulting company. Previously, Dr. Chobotov served as Senior Vice President of R&D and board member of U.S. Electricar, and Senior Systems Engineer at Hughes Space and Communications. He also led the design of the Lunar Prospector, which was subsequently implemented as the first NASA Discovery mission. Dr. Chobotov received his Ph.D. in Mechanical Engineering, his M.S. in Mechanical Engineering and his B.S. in Engineering and Applied Science, all from the California Institute of Technology.

Image of Matthew Thompson M.D.

Matthew Thompson, M.D., joined in December 2016. Most recently, Dr. Thompson served as Professor of Vascular Surgery at St. George's, University of London and St George's Vascular Institute (SGVI). He trained at Cambridge, St. Bartholomew's Hospital, the University of Leicester and Adelaide. His awards include a Hunterian Professorship, the Moynihan travelling fellowship and the gold medal for the intercollegiate examination. Dr. Thompson is also the editor of the Oxford Textbook of Vascular Surgery and the Oxford Handbook of Vascular Surgery. He was Chair of the National Specialized Commissioning Clinical Reference Group for Vascular Services and is a founder of the British Society for Endovascular Therapy. Dr. Thompson is also a Council Member of the Vascular Society, Chairman of the Vascular Society Annual Scientific Meeting and elected President for 2018.

Image of Meg Carr

Meg Carr joined Endologix in February 2016 in conjunction with the merger of TriVascular. She joined TriVascular in 2010 as the Director of Regulatory and is currently the Vice President, Regulatory Affairs at Endologix. Prior to joining TriVascular, Ms. Carr led an independent consulting business specializing in Regulatory Submissions, Quality Systems, and Design Control and served as Director of Regulatory and Director of Compliance at Medtronic. Ms. Carr began her career in roles of increasing responsibility at Stryker Endoscopy, specializing in international product management and Regulatory Affairs. During her career, she has worked with orthopedic devices, coronary stents, neurovascular stents, and endovascular stent grafts, finalizing the first AAA stent graft PMA approval in 1999. While at TriVascular, Ms. Carr led CE Marking, PMA, and various worldwide regulatory approvals. Ms. Carr received a B.A. in Spanish and a B.S.C. in Marketing from Santa Clara University, with coursework at the University of Madrid and the University of Colorado.

Image of Joseph A. DeJohn

Joseph A. DeJohn joined in July 2008. He has more than 20 years of sales management experience in the medical device industry, including serving 17 years at C.R. Bard. During his tenure at C.R. Bard, he held sales management positions with increasing responsibilities, serving the last six years as Vice President of Sales of the Peripheral Vascular Division. In this position, he was responsible for managing a 200-person sales organization and played a leadership role in strategic planning, budgeting, recruitment, professional development, national accounts, and customer service. Prior to that, Mr. DeJohn was Director of Sales of C.R. Bard's Peripheral Technologies Division. Before joining C.R. Bard, Mr. DeJohn served five years with Bausch & Lomb Corporation in various sales management positions. Mr. DeJohn holds a B.S. in Education from Bowling Green State University.

Image of Jeremy Hayden

Jeremy Hayden joined us in August 2017 as General Counsel. Prior to Endologix, Jeremy served as General Counsel and VP Business Development for Cytori Therapeutics, a company focused on cell therapy and nanomedicine. Prior to Cytori, Jeremy served as Assistant General Counsel for Volcano Corporation. Volcano was acquired by Royal Phillips for approximately $1.2 billion in February 2015. Prior to his tenure at Volcano, Jeremy practiced corporate and securities law at several international law firms, including Brobeck, Phleger & Harrison LLP and Mintz Levin Cohn Ferris Glovsky & Popeo, PC. Mr. Hayden received his A.B. in Politics from Princeton University and his J.D. from the University of Michigan Law School.

Image of Meredith Huetter

Meredith Huetter joined us in February 2016 in conjunction with the merger of TriVascular.  She joined TriVascular in November 2009 and has served in various roles of increasing responsibility at TriVascular, including most recently as Vice President, Clinical and Medical Affairs.  Mrs. Huetter has over 15 years of medical device experience. Prior to joining TriVascular, Ms. Huetter led the EndoVascular Product Marketing organization at Medtronic, Inc., where she directed several product introductions across the aortic product line.  Ms. Huetter began her career with a focus on supply chain and healthcare at Ernst & Young, a management consulting firm.  She received her B.S. in Industrial Engineering from Iowa State University.

Image of Dave Jennings

Dave Jennings joined in June 2013. Previously, Mr. Jennings spent twenty-five years as a Human Resources leader with Johnson & Johnson, twelve of those years in medical devices.  At J&J, he served as Vice President, Human Resources for Advanced Sterilization Products in Irvine, CA and for nearly ten years at Neutrogena Corporation in Los Angeles. He has a proven track record of building high performance organizations in fast growing global companies.  He has a diversity of health care experience, to include ophthalmology, surgical products, hospital products, instrument sterilization, pharmaceuticals and consumer products.   After leaving J&J, Dave held HR Vice President roles in the Entertainment Industry as well as in a health care start-up venture in Southern California.  Dave holds a Masters in Business from Claremont Graduate University.

Image of Michael P. Maszy

Michael P. Maszy joined us in February 2016 in conjunction with the merger of TriVascular.  He joined TriVascular in September 2010 and has served in various roles of increasing responsibility at TriVascular, including most recently as Vice President, Manufacturing. Mr. Maszy has over 15 years of medical device experience.  Prior to joining TriVascular, Mr. Maszy served in various roles at Medtronic, Inc. from 2000 to 2010. Most recently, he led new product development teams at Medtronic Neurosurgery as Director of Project Management. Previously, Mr. Maszy led Operations for Medtronic Endovascular Innovations and also has held positions in manufacturing engineering in Medtronic's Peripheral Vascular and Ear, Nose & Throat divisions. Mr. Maszy received his M.B.A. in Entrepreneurial Management from The Wharton School at The University of Pennsylvania and both his M.S. and B.S. in Industrial & Systems Engineering from the University of Florida.

Image of Laura Nagel

Laura Nagel joined us in January 2017 as Vice President, Global Quality, bringing over 25 years of medical device experience, including specific experience with catheter-based technologies in class III cardiovascular implants.  Most recently, Laura served as Vice President, Quality Assurance at Direct Flow Medical, a privately-held medical device company developing and commercializing novel transcatheter heart valve products to treat structural heart disease. From 1997 to 2015, she served in several leadership positions at Edwards Lifesciences and has broad experience in quality assurance, design validation, quality engineering, microbiology, compliance and post-market surveillance.  She also has extensive experience dealing with international regulatory agencies.  Laura began her career at Allergan, serving in regulatory affairs, project management and product development positions from 1987 to 1997.  She received a Bachelor’s degree in biological science from the University of California, Berkeley. 

Image of Jeff Stelk

Jeff Stelk joined Endologix in August 2004.  He has more than 25 years of sales and sales management experience in the medical device industry including more than 16 years in the EVAR industry with Medtronic and Endologix.  Mr. Stelk is currently responsible for leading and managing the US Sales organization.  Over his tenure at Endologix, Jeff has had previous roles of increasing responsibility as a Regional Sales Manager, Area Sales Manager and Director of Sales.  In these roles, Jeff has delivered significant sales growth by launching multiple new products and hiring, training and developing members of the Endologix sales team.  Mr. Stelk holds a BA in Business Administration from St. Ambrose University in Davenport, IA.

Image of W. Patrick Stephens

W. Patrick Stephens joined us in February 2016 in conjunction with the merger of TriVascular.  He joined TriVascular in April 2008 and has served in various roles of increasing responsibility at TriVascular, including most recently as Vice President, Product Development.  Mr. Stephens first joined TriVascular in 1999 and served as a key member of the original TriVascular team through the acquisition by Boston Scientific in 2005. Mr. Stephens has more than 20 years of experience in the design, development and manufacturing of medical devices and previously has served in roles of increasing responsibility at Medtronic, Boston Scientific and W.L. Gore.  Mr. Stephens received his M.S. in Mechanical Engineering from the University of Arizona and his B.S. in Mechanical Engineering from the University of Colorado.

Board of Directors

Dan Lemaitre

Dan Lemaitre most recently served as the President and CEO of Direct Flow Medical. Previously, Mr. Lemaitre was the CEO of CoreValve, one of the early pioneers in transcatheter aortic valves.  By 2009 revenue were at a $100 million annualized end market run rate.  Dan led negotiations that resulted in the sale of CoreValve to Medtronic in a transaction valued at $800 million.

Prior to joining CoreValve, Mr. Lemaitre was a Senior Vice President at Medtronic where he headed-up strategic planning and corporate development.  Dan was also a member of Medtronic’s executive and operating committees.    

In 2012 Dan was part of an investor syndicate that took private a $250 million division of a major orthopedic company and served as its initial Chairman.   He is also on the board of Globus Medical  (NYSE: GMED) one of the fastest growing spinal companies with revenue of ~$600 million per annum.  Dan serves on the Globus audit and compensation committees.

Earlier in his career Dan spent 28 years in the medical device field as an investment analyst.  He began his career as a buy-side analyst in 1978 working at National City Bank in Cleveland and later, Standish Ayer & Wood in Boston.  His sell-side career included 18 years with Cowen & Company, where he was a managing director and led the health care research team.  In 1999, Dan moved his team to Merrill Lynch where he headed-up the medical technology effort for six years.  During his Wall Street tenure, Dan was named to Institutional Investor’s All American research team for 19 consecutive years, capturing first place honors 8 times as the top-ranked medical device analyst in the country. 

Dan has a BA in Economics (1976) from Bethany College (West Virginia) and an MBA (1978) from Bowling Green State University in Ohio.  He earned a Chartered Financial Analyst (CFA) in 1982.   

Christopher G. Chavez

Mr. Christopher Chavez joined our board of directors February, 2016 following the completion of the merger between Endologix and TriVascular.  Mr. Chavez joined TriVascular as President, Chief Executive Officer and Chairman in April 2012. Mr. Chavez has over 30 years of leadership experience in the medical device industry. From 2005 through August 2011, Mr. Chavez served as President of the Neuromodulation Division of St. Jude Medical, Inc., or St. Jude Medical, and served as CEO, President and Director of Advanced Neuromodulation Systems, or ANS, from 1998 until its acquisition by St. Jude Medical in 2005. Prior to ANS, Mr. Chavez spent 17 years at Johnson & Johnson, most recently as Vice President and General Manager of the Infection Control Business Unit. Mr. Chavez served on the board of directors of Advanced Medical Optics Inc. from 2002 until it was acquired by Abbott Laboratories Inc. in 2009. Mr. Chavez has previously served as Chairman of the Medical Device Manufacturers Association and Chairman of the Dallas/Fort Worth Health Industry Council. Mr. Chavez received his M.B.A. from Harvard Business School and his Bachelors of Accountancy from New Mexico State University, Las Cruces.

Guido Neels

Mr. Guido Neels has served on our board of directors since December 2010. Mr. Neels is an Operating Partner at EW Healthcare Partners. Prior to joining EWHP in 2006, Mr. Neels served in a variety of management positions at Guidant Corporation, a developer of cardiovascular medical products. Mr. Neels served as Guidant's Chief Operating Officer, Guidant's Group Chairman/Office of the President, Guidant's President of Europe, Middle East, Africa and Canada, Guidant's Vice President of Global Marketing and Vascular Intervention, and as Guidant's General Manager of Germany and Central Europe. Guido currently serves on the Board of Directors for AxoGen, Inc., Entellus Medical, Endologix, Inc. and Bioventus, LLC. In addition to the portfolio company boards on which he serves, Mr. Neels also serves on the Board of Directors for Novo A/S, Arsenal Medical, Inc./480 BioMedical and Christel House International, a not-for-profit organization. Mr. Neels has a business engineering degree from the University of Leuven in Belgium and an M.B.A. from the Stanford University Graduate School of Business.

Leslie Norwalk

Ms. Leslie Norwalk has served on our board of directors since 2015. Ms. Norwalk currently serves as a Strategic Advisor and Strategic Counsel to the law firm Epstein Becker & Green, P.C., healthcare and life science consultancy EBG Advisors, Inc., and legislative and regulatory consultancy National Health Advisors. Ms. Norwalk is also an Operating Partner at Enhanced Equity Fund, L.P. and serves as an Advisor to Warburg Pincus LLC, and Peloton Equity. Previously, Ms. Norwalk served the Bush Administration as the Acting Administrator for the Centers for Medicare & Medicaid Services, where she managed the day-to-day operations of Medicare, Medicaid, State Child Health Insurance Programs, Survey and Certification of health care facilities and other federal health care initiatives. For four years prior to that, she was the agency’s Deputy Administrator, responsible for the implementation of the changes made under the Medicare Modernization Act, including the Medicare Prescription Drug Benefit. Prior to serving the Bush Administration, Ms. Norwalk practiced law in the Washington, D.C. office of Epstein Becker & Green, P.C. where she advised clients on a variety of health policy matters. She also served in the first Bush administration in the White House Office of Presidential Personnel, and the Office of the U.S. Trade Representative. Ms. Norwalk also serves as Member of International Advisory Council at APCO Worldwide Inc. She earned a J.D. degree from the George Mason University School of Law and a bachelor’s degree, cum laude, in Economics and International Relations from Wellesley College.

Gregory D. Waller

Gregory D. Waller has served on our board of directors since November 2003. Mr. Waller also serves on the board of Sunshine Heart Corporation, a publicly traded company, as Audit Committee Chairman and was the Chief Financial Officer of Ulthera Corporation, a privately held company that sells an ultrasound device used for non-invasive brow lifts from October of 2011 until its acquisition by Merz GMBH. He retired from Ulthera in April of 2015. From March 2006 until April 2011, Mr. Waller was Chief Financial Officer of Universal Building Products, a manufacturer of concrete construction accessories. Previous to that, Mr. Waller has been in retirement except for board directorships. Mr. Waller served as Vice President-Finance, Chief Financial Officer and Treasurer of Sybron Dental Specialties, Inc., a manufacturer and marketer of consumable dental products, from August 1993 until his retirement in May 2005 and was formerly the Vice President and Treasurer of Kerr, Ormco Corporation, and Metrex. Mr. Waller joined Ormco Corporation in December 1980 as Vice President and Controller and served as Vice President of Kerr European Operations from July 1989 to August 1993. Mr. Waller has an M.B.A. with a concentration in Accounting from California State University, Fullerton. Mr. Waller also served on the board of directors and audit committee of Cardiogenesis Corporation, a publicly-traded company until its acquisition by Cryolife in 2011. Mr. Waller also served on the boards of directors of Alsius Corporation, a publicly-traded company, from June 2007 to September 2009 until its acquisition by Zoll, Biolase Technology, Inc., a publicly-traded company, from October 2009 to August 2010, Clarient, Inc., a publicly-traded company which was acquired by General Electric Company on December 22, 2010, and SenoRx, Inc., a publicly-traded company which was acquired by C.R. Bard, Inc. on July 6, 2010.

Thomas C. Wilder

Thomas Wilder has served on our board of directors since May 2010. Mr. Wilder currently serves as President & CEO of Neuros Medical, Inc., a neuromodulation company. He currently also serves on the board of Penumbra Inc. (PEN), a global interventional therapies company that designs, develops, manufactures and markets innovative medical devices.  From February 2010, Mr. Wilder served as President and Chief Executive Officer of Sequent Medical, Inc., until it was acquired by Terumo Corporation in July 2016.  From May 2009 to January 2010, Mr. Wilder consulted with several medical device companies. From April 2006 to April 2009, Mr. Wilder served as President and Chief Executive Officer of Photothera, Inc. From 2002 through January 2006, Mr. Wilder served at Micro Therapeutics, Inc. (MTIX) as President and Chief Executive Officer. Following the merger of Micro Therapeutics, Inc. into ev3 Inc. in January 2006, Mr. Wilder served as President, ev3 Neurovascular until April 2006. From 1991 to 2002, Mr. Wilder served in various roles for Medtronic, Inc. Mr. Wilder has a B.A. in Economics from Stanford University and an M.B.A. from Northwestern University's J.L. Kellogg Graduate School of Management.

Thomas F. Zenty III

Thomas F. Zenty, III has served on our board of directors since May 2013. He is currently the President and Chief Executive Officer of University Hospitals Health System, Inc., Cleveland, OH.  Previously, Mr. Zenty held various executive positions at Cedars-Sinai Health System, St. Josephs Medical Center, a division of Catholic Health Care West, Franciscan Health System of New Jersey and St. Mary Hospital, Connecticut.  Mr. Zenty is Chairman of the Board of Western Reserve Assurance Company, Ltd. SPC, a privately-held insurance company and chairs The Coalition to Protect American’s Health Care.  Mr. Zenty is a past board member of the American Hospital Association and has also served on the board of directors of Nationwide Financial Services and Amerimed. Mr. Zenty has held several academic positions with prestigious universities, including his current position as Adjunct Professor, Banking & Finance at Case Western Reserve University.  He received a Master’s degree in Public Administration from New York University, a Master’s degree in Hospital Administration from Xavier University, and a Bachelor’s degree in Health Planning from Pennsylvania State University.