A seasoned leadership team offering
a wealth of valuable perspective.
The comprehensive knowledge and expertise of our Leadership Team encompasses the broad array of disciplines needed to build and maintain successful dental practices — while drawing on key capabilities and perspectives gained from previous positions outside the industry. Over half of these industry experts have been with American Dental Partners for nearly its entire history.
Today, the members of our Leadership Team continue to provide thought leadership, bold ideas and innovative solutions, helping to elevate the practice and delivery of quality dental care across the expanse of the ADPI network.
Kevin M. Trexler
Chief Executive Officer
Kevin Trexler joined American Dental Partners in 2015 as Chief Executive Officer. Mr. Trexler had been employed by DaVita in various roles since 2006, most recently as Senior Vice President of Operations, in which capacity he had oversight of and responsibility for more than 700 dialysis clinics. Prior to DaVita, Mr. Trexler served as a Lieutenant in the U.S. Navy.
Ian H. Brock
Vice President, Operations Services
Ian Brock joined American Dental Partners in 1996 and has served as Vice President – Operations Services since 2013. He also served as Vice President, Planning and Investment, Vice President – Finance, Vice President – Financial Planning, Director – Financial Planning and Assistant Controller. He previously worked for American Medical Response in various finance positions.
Patricia E. Duncan
Vice President, Organizational Development
Patricia Duncan joined ADPI in 2008 and serves as a member of ADPI’s leadership team responsible for Organizational Development and Human Resources. Ms. Duncan previously served as Manager, Human Resources and Training at Axcelis Technologies and as Manager, Human Resources at Creo.
Michael W. Hoyt
Vice President, Information Services
Michael Hoyt joined American Dental Partners in 2009 and serves as Vice President – Information Services. Mr. Hoyt previously held the position of Senior Technology Director for GTECH, an international gaming technology company and various positions with Electronic Data Systems (EDS), serving clients across several industries, including health care claims processing and medical device manufacturing.
Michael J. Kenneally
Senior Vice President, Dental Group Operations
Michael Kenneally joined American Dental Partners in 1996 and has served as Senior Vice President – Regional Operations since 2005. He previously served as Chief Executive Officer, Chief Operating Officer, Director of Business Management, Director of Finance and Information Systems and Controller of one of our affiliated dental groups for 17 years.
David M. Nelsen
Vice President, Corporate Controller
David Nelsen joined American Dental Partners in 2001 and has served as Vice President – Corporate Controller since 2013. He has also served as Director – Accounting and Regional Controller. Mr. Nelsen previously held a variety of finance positions at The Pillsbury Company and was an audit manager for KPMG.
Timothy C. Rodenberger
Vice President, General Counsel and Secretary
Timothy Rodenberger joined American Dental Partners in 2009 and serves as Vice President – General Counsel and Secretary. Mr. Rodenberger previously served as Corporate Counsel at Avid Technology and as Associate Counsel at Wilmer Cutler Pickering Hale and Dorr LLP. Mr. Rodenberger is a graduate of Harvard Law School.
Jesley C. Ruff, DDS, MPH
Senior Vice President, Chief Professional Officer
Dr. Jesley Ruff joined American Dental Partners in 1999 and has served as Senior Vice President – Chief Professional Officer since 2005. He also served as Vice President – Chief Professional Officer. Dr. Ruff previously held the position of President of Wisconsin Dental Group, S.C., one of American Dental Partners’ affiliated practices where he was a practicing dentist and held a variety of leadership positions. Dr. Ruff currently serves on the Board of Directors of the Children’s Dental Health Project and is a member of the Funders Oral Health Policy Group. He has formerly served on the Board of Directors of the National Association of Prepaid Dental Plans and was an Assistant Professor at the Marquette University School of Dentistry where he had also held a variety of clinical faculty and grant positions. He has degrees from the Mailman School of Public Health at Columbia University, Marquette University School of Dentistry and University of Rochester Eastman Dental Center.
Nancy M. Schiaparelli
Vice President, Chief Financial Officer & Treasurer
Nancy Schiaparelli joined American Dental Partners in 2013 as Vice President, Chief Financial Officer and Treasurer. Ms. Schiaparelli has previously worked at Unilever, ConAgra, Innovative Brands and BIC Advertising and Promotional Products in a variety of financial leadership positions.
Michael J. Vaughan
Executive Vice President, Chief Operating Officer
Michael Vaughan joined American Dental Partners in 2000 and has served as Executive Vice President – Chief Operating Officer since 2003. He has also served as Senior Vice President – Chief Operating Officer, Senior Vice President – Regional Operations, and Vice President – Operations. Mr. Vaughan previously held positions of Regional Vice President, Vice President and General Manager and Vice President of Strategic Initiatives for Cardinal Distribution, a subsidiary of Cardinal Health. In addition, he previously worked for McKesson Corporation in various sales management positions.