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Hero Practice Services Leadership Team


Joshua Gwinn, Chief Executive Officer

Mr. Gwinn brings extensive operational experience in dental, orthodontics and vision care to his role as Hero Practice Services Chief Executive Officer. He is keenly focused on patient needs and driving a culture that always puts our patients above all else. After starting his career as an Operation Specialist in the United States Navy, Josh spent several years with National Vision Inc. affiliated brands building his skills in all aspects of the optical field including but not limited to: optical dispensing, lab operations, field training, leadership, and Denovo operations. He then shifted focus to the dental field becoming the Regional Director for Great Expressions Dental Centers throughout Michigan and Ohio. Most recently, Josh ran operations as well as training and education for a large fleet of Gentle Dental practices in the Pacific Northwest, and California. Josh was born and raised in Arkansas in a large, blended family with seven children and feels a deep personal connection to Hero’s mission of expanding care access to underserved children.


Dr. Brian Bishop, Dental Clinical Director

Dr. Bishop serves as Dental Clinical Director for the Hero Practice Services affiliated dental practices. He works closely with executive management and our team of regional dentists to ensure that dental services rendered at all Hero affiliated practices are of the utmost quality. Dr. Bishop is committed to excellence in patient experiences and seeks to promote access to care for underserved children. Dr. Bishop provides continuing education to dentists in topics of pediatric dentistry. He coaches and mentors dental providers on clinical guidelines, leadership, patient/parent communication and clinical documentation. Dr. Bishop is a graduate of Temple University School of Dentistry and completed his residency in Pediatric Dentistry at Temple Children’s Hospital in Philadelphia, PA. He promotes a culture of evidence based dentistry and promotes the guidelines endorsed by the American Academy of Pediatric Dentistry.


Dr. Michael Pharris, Optometric Clinical Director

Dr. Pharris oversees optometric clinical quality for Hero Practice Service, leading the eye care program since 2007.  Dr. Pharris has been practicing eye care for over 25 years and has specialized in pediatric eye care for the past 15 years. He is passionate about closing the gap of untreated childhood vision issues and making sure children’s eyes and their visual systems are functioning to help them learn and develop properly. Dr. Pharris is responsible for defining Hero’s clinical guidelines and training and coaching the optometric staff to deliver consistent, top quality vision care. Born in Southern California and raised in Colorado Springs, Michael Pharris graduated with a Biological Sciences degree from Colorado State University in 1985. He then went on to Pacific University College of Optometry in Oregon, where he received his Doctorate of Optometry degree in 1989.


Dr. John DuRussel, Orthodontic Clinical Director

Dr. John DuRussel was born and raised in Brighton, Colorado. He attended college at Michigan State University where he studied Human Physiology then went on to obtain a Masters Degree in Biomedical Science at the Wayne State School of Medicine. Dr. DuRussel earned his Doctor of Dental Surgery degree at the University of Michigan School of Dentistry, hailed as one of the top dental schools in the world. He then continued his training at the University of Michigan, where he earned a Masters of Science in Orthodontics and was fortunate to have some of the leading Orthodontists in the country as his mentors. Dr. DuRussel loves his work transforming his patients’ smiles while watching their self-confidence grow. In addition to his role as lead Orthodontist in our Longmont, Colorado practice, Dr. DuRussel is responsible for defining, training and auditing our orthodontic standards of care and acts as a resource to all Hero Practice Services orthodontists for procedural and individual patient consultation.


Benjamin Mezer, Chief Compliance Officer

Mr. Mezer serves as Chief Compliance Officer. He brings an extensive background in healthcare compliance.  While serving as an Assistant General Counsel for the Tennessee Department of Health, Mr. Mezer advised and/or litigated cases before the Boards of Dentistry, Medical Examiners, Pharmacy, Nursing, Veterinary Medical Examiners, Optometry, and the Board of Dispensing Opticians in matters regarding licensure discipline and general governance. In private practice, Mr. Mezer represented healthcare professionals and corporations who were facing government investigations/prosecutions or were faced with employee/employer disputes, and advised them on regulatory compliance issues.  He has also served as the General Counsel and Chief Compliance Officer for a nationwide pharmacy and a pharmacy management company. Ben was raised in Greensboro, North Carolina and received his bachelor’s degree from Tufts University and his Juris Doctorate from Vanderbilt University School of Law. Ben is licensed to practice law in Colorado and Tennessee and is Certified in Healthcare Compliance (CHC) by the Health Care Compliance Association (HCCA).


Mark Musso, Chief People Officer

Mr. Musso serves as Chief People Officer. In this role, Musso oversees human resources, recruiting, training and acts as a provider liaison. He spent 17 years at Target Corporation, as a team leader, operations group leader, regional operations expert, and executive mentor — in addition to other roles. After leaving Target Corporation, Musso spent four years with Hero Practice Services as Chief Operating Officer and Chief Human Resources Officer. Prior to rejoining the Hero Practice Services team, Musso spent more than a year at AIM Integrated Medicine as Chief Operating Officer and Director of Human Resources. Musso was born and raised in Pueblo, Colorado.


Paul Olson, Chief Information Officer

Mr. Olson serves as the Chief Information Officer.  His IT career started while serving in the U.S. Army before transitioning into a contractor role working as a technician, Help Manager, and Exchange Administrator for NORAD/USSPACECOM and NORAD/USNORTHCOM. He then moved into healthcare serving as the Director and Vice President of IT for a federally qualified health center serving medical, dental, and behavioral health patients in the Pikes Peak region. He finished his bachelors and master’s programs at Colorado Technical University. He is also an alumni of Leadership Pikes Peak. He is responsible for the IT, Call Center, and Facilities teams and leads the Strategy and Project Governance committees. Olson is passionate about serving patients and ensuring Hero’s mission accomplished each day.