Our Management Team

John F. Harper

John F. Harper

Mr. Harper has operated numerous successful medical technology companies in his entrepreneurial career. He was President and CEO of ATI Medical (implanted cobalt palladium rods to ablate cancers), which was funded by Domain Associates, Proquest Ventures and Johnson & Johnson Development Corp.

Prior to ATI he was Executive Chairman of Meretek Diagnostics (diagnostic breath tests using isotope labeled substrates), which was ultimately acquired by American Standard Companies. Mr. Harper also served as President and CEO of Índigo Medical (medical lasers), where he led a successful merger with Johnson & Johnson Ethicon EndoSurgery.

Mr. Harper was also President and CEO of Menlo Care (specialty vascular access and urology devices), which also merged into a division of Johnson & Johnson.

Douglas M. Crumb

Douglas M. Crumb

Mr. Crumb has extensive experience with medical device companies in both the private equity and publicly traded sectors. His specialties are in lean manufacturing, project management, product development and driving profitability.

His experiences are both domestic and international. Mr. Crumb managed multiple large manufacturing operations domestically and internationally in NY, MX and CA for ConMed Corporation. Mr. Crumb also led manufacturing operations, quality assurance and engineering for DHD Healthcare and IZI Medical Products, successfully transitioning both medical device manufacturers from private equity holdings to new ownership.

Mr. Crumb earned his Masters in Advanced Engineering from the State University of New York in 1999.

Richard J. Melker, M.D., Ph.D.

Richard J. Melker

Dr. Melker is a co-founder of Xhale and HyGreen. He received his Ph.D. (Neurobiology) and M.D. degrees from Albert Einstein College of Medicine. After a residency in Pediatrics, and fellowships in Pediatric Cardiology and Critical Care Medicine, he served as Director of Emergency Services at Shands Hospital at the University of Florida College of Medicine, as well as Medical Liaison for the NASA space shuttle program and to the Crystal River Nuclear Power Plant.

He holds the position of Professor of Anesthesiology, Pediatrics and Biomedical Engineering at U.F. and has been Director of the Florida Anesthesiology Computer and Engineering Team (FACET) which develops and licenses medical devices and technologies.

Dr. Melker holds over 50 issued U.S. (and numerous foreign) patents including several for emergency medical devices in use throughout the world, and by the U.S. Special Forces.

Donn Dennis, M.D., F.A.H.A.

Donn Dennis

Dr. Dennis, also a co-founder of Xhale, is a board-certified anesthesiologist and previously served in various pharmaceutical company executive positions in the San Francisco area.

In addition to his work with Xhale, Dr. Dennis is a professor in the Departments of Anesthesiology, Psychiatry and Pharmacology & Experimental Therapeutics in the College of Medicine at the University of Florida, where he also holds the Joachim S. Gravenstein M.D. Endowed Chair in Anesthesiology. He is also the Director of Nanomedicine at the University of Florida.

He is a co-inventor on numerous patents and has published 162 full length manuscripts and abstracts in peer-reviewed journals and has edited two textbooks.

Mark Tanner

Mark Tanner

Mark Tanner graduated cum laude from Yale with a double major in music and computer science. He has led active musical and computer careers, and was among the first Internet programmers, starting in 1978.

He worked for IBM and Schlumberger before starting his own business. He has provided clients with a broad spectrum of services, ranging from embedded systems to computer forensics. With over 30 years of Internet experience, he now specializes in web-based application architecture and development. He created the HyMarks reporting system used by HyGreen, Inc. in hospitals nationwide.

He is currently the Chairman of Emergent Growth Fund II, a Gainesville-based angel investor fund, and advises numerous startup companies.

John Moscarillo

John Moscarillo

John Moscarillo

John Moscarillo is the VP of Commercial Operations for Xhale Assurance with outstanding credentials and a proven track record in sales, management, channel partnerships and corporate alliances. Mr. Moscarillo brings with him 17 years of valuable industry experience and has earned numerous awards and recognition in a variety of sales, sales training and sales management positions.

Mr. Moscarillo initially joined Xhale in December 2014 as the National Business Development Manager of Xhale SMART. He was promoted to Vice President of Commercial Operations for Xhale Assurance with responsibility for Sales, Business Development and Operations in both national and international markets. Previously, while serving in progressive sales roles with Medtronic, Inc. and Physio-Control, Inc., Mr. Moscarillo developed clinical expertise in the hospital and pre-hospital markets with an emphasis on Cardiology, ICU, and Emergency Departments. Prior to that, Mr. Moscarillo spent five years in the pharmaceutical sales industry.

Mr. Moscarillo received a Bachelor of Arts degree from Longwood University.