Senior Leadership


ACell’s principal management team comprises a group of leaders committed to advancing regenerative medicine for wound and surgical patients with unmet medical needs.

Patrick A. McBrayer

President and Chief Executive Officer

Patrick A. McBrayer joined ACell as President and Chief Executive Officer in 2016. Mr. McBrayer is on the Board of Directors of Misonix Inc (NASDAQ:MSON), which markets therapeutic ultrasound medical devices world-wide. He has recently advised medical device companies in spine, orthopedics and biotechnology. Mr. McBrayer was President and Chief Executive Officer of AxioMed Spine Corporation until the company was acquired in 2014. AxioMed focused on restoring the native function of the spine with the company’s Freedom total disc spine technology.

Prior to AxioMed, Mr. McBrayer was Chief Executive Officer of Xylos Corporation, a medical biomaterials company. He was also a Founder of Transave Inc. (now Insmed Inc.), a biotechnology company focused on the site specific treatment of lung disease. Prior to joining Xylos, Mr. McBrayer served as President and CEO of Exogen, Inc., a company focused on the non-invasive treatment of musculoskeletal injury and disease, which was acquired by Smith & Nephew, Inc. in 1999.

Previously, Mr. McBrayer was President and CEO of Osteotech, Inc., a worldwide leader in tissue technology (acquired by Medtronic Inc.). He has been responsible for a number of private placements, as well as Osteotech and Exogen’s public offerings. He received the Thomas Alva Edison Patent Award in 1998 for a biological implant for bone repair that is now a market leading product. Prior to joining Osteotech, Mr. McBrayer held positions of increasing responsibility for Johnson & Johnson, Inc.

He has over 20 years healthcare senior management experience and served as an Infantry Officer Company Commander in the U.S. Army prior to beginning his business career. Mr. McBrayer is a graduate of the United States Military Academy at West Point.


Edward O’Brien

Chief Financial Officer

Edward O’Brien has served as our Chief Financial Officer since 2008. From 2008 until 2013, Mr. O’Brien also served as the Chief Financial Officer of Credit Management Solutions, Inc., a financial services technology company. Prior to joining ACell, Mr. O’Brien held the position of Executive Vice President, Chief Financial Officer and Corporate Controller for Transaction Network Services, Inc. from 1999 through 2007.


Bill Hrubes

Vice President and Chief Compliance Officer

Bill Hrubes has served as Vice President and Chief Compliance Officer at ACell since 2015, after serving as Senior Director of Compliance and Risk Management since 2014. He has more than 15 years of experience in the development, implementation, and management of compliance and ethics programs in the life sciences industry. Mr. Hrubes previously served as the Compliance Officer for the Joint Reconstruction business of Johnson & Johnson. He has held other leadership roles in compliance and risk management at companies including Smith & Nephew, Novation, Gambro, and Fresenius Medical Care North America.


Chris Branch

General Counsel and Vice President, Human Resources

Chris Branch has served as General Counsel and Vice President, Human Resources since 2018 after joining ACell as Deputy General Counsel in 2013. Prior to ACell, he was Chief Litigation Counsel for Catalyst Health Solutions. Mr. Branch has more than 15 years of experience in outside counsel and in-house counsel roles and a history of executing strategic and tactical legal and business initiatives that minimize risk and drive revenue. He holds a law degree from Georgetown University Law Center and a Bachelor of Arts in Public Policy from Duke University.


Nino Pionati

Vice President, International and Business Development

Nino Pionati joined ACell in 2018 as Vice President, International and Business Development. Prior to ACell, Mr. Pionati was Chief Strategy and Marketing Officer at Alliqua Biomedical. Prior to his role at Alliqua, he served as Vice President of Marketing for Bayer HealthCare Pharmaceutical’s Essure portfolio and a member of the Global Franchise and Women’s Health Care Leadership teams. Prior to joining Bayer, Mr. Pionati spent over 14 years at ConvaTec and Bristol Myers Squibb, where he held several global marketing positions at the corporate level, including President of Global Marketing, Business Development and International and President of the Intercontinental Region. He also progressed through positions of increasing responsibility during his 13 years at Johnson & Johnson, and co-led the strategic development of internally-backed startup, J & J Independence Technologies, including sales, service, clinical, regulatory and marketing. He holds an MBA from the University of Pittsburgh’s Katz School of Business and a Bachelors of Commerce in Marketing from Concordia University of Montreal.


Sue Sutton-Jones

Vice President, Regulatory Affairs and Quality

Sue Sutton-Jones joined ACell in 2019 as Vice President, Regulatory Affairs and Quality. Prior to ACell she served as the Vice President, Regulatory and Quality at RTI Surgical. She has over 30 years of experience in both regulatory and quality, including additional executive leadership positions at MBio Diagnostics, ConMed Linvatec, OraSure Technologies, Serologicals, Johnson & Johnson and others. Ms. Sutton-Jones was elected as a Fellow in the Regulatory Affairs Professional Society in 2008, a group selected for excellence and contribution to the regulatory affairs profession. Additionally, she is the on-line course author of “Regulation of US and EU Biologics”, published by the Regulatory Affairs Professional Society. She holds a master’s degree in technology management from the Georgia Institute of Technology and a bachelor’s degree in biochemistry from Queens University of Charlotte.


Patty Meehan

Vice President, Administrative Services

Patty Meehan has served as ACell’s Vice President, Administrative Services since 2002. She brings more than 30 years of administrative leadership in the financial and healthcare industry to the organization. Before joining ACell, Ms. Meehan was Director of Administration at CMSI and Perpetual Leasing Corp. She attended the College of Notre Dame of Maryland.


Darren Doerr

Director of National Sales

Darren Doerr has served as the Director of National Sales at ACell since 2019. Mr. Doerr joined ACell in 2009 as a Territory Manager, and his responsibilities quickly increased when he became an Area Manager in 2011. Mr. Doerr then took on the position of Regional Manager in 2014, where he successfully managed a team of over 40 people. Prior to joining ACell, Mr. Doerr was the Founder and CEO of Golf Marketing Concepts. Mr. Doerr is known for delivering exceptional sales results and successfully managing a growing team of sales representatives. He attended the University of Kentucky and then University of North Florida.


Jay Merkel

Co-Head, Marketing

Jay Merkel has served as Co-Head of Marketing at ACell since 2018, after serving as Director of Product Marketing and Market Access since 2017. She has 20 years of experience in product development and marketing in the medical device Industry. Prior to joining ACell, Ms. Merkel was the Director of Marketing and Product Management with CareFusion (now BD). Prior to CareFusion, she held marketing and R&D roles with Olympus, B. Braun, and BD. She has an MBA from Lehigh University and a Bachelor’s of Science in Mechanical Engineering from Case Western Reserve University.


Arjun Ishwar

Co-Head, Marketing

Arjun Ishwar has served as Co-Head of Marketing at ACell since 2018, after serving as Director of Product Management since 2016. He has more than 10 years of experience in Sales and Marketing of soft tissue medical devices. Prior to joining ACell, Mr. Ishwar worked for Integra LifeSciences within their burn and reconstructive division. He received both a Bachelor of Science degree in Biomedical Engineering and Master of Science degree in Tissue Engineering, with a focus on regenerative extracellular matrix development, from Purdue University.