At Johnston-Willis Hospital, our leaders are proud to live by our mission to provide high quality and compassionate patient-centered healthcare to our community.

Meet our leadership team

CEO William Lunn, MD

William Lunn, MD, serves at the Chief Executive Officer of HCA Virginia’s Chippenham and Johnston-Willis Hospitals, a 758-bed, two-campus hospital system part of HCA Healthcare’s Capital Division in Richmond, Virginia.

William is a Harvard fellowship-trained executive with more than 18 years of distinguished experience in roles leading high-profile academic medical centers and a major regional health system, in addition to private practice. Immediately prior to joining CJW, William was the president and CEO of Tulane Health System, where he had served since 2014.

During William’s tenure at Tulane Health System, the organization achieved a Joint Commission accreditation with top scores, Tulane Lakeside Hospital for Women and Children was named a 2016 Top Teaching Hospital by The Leapfrog Group, and Lakeview Regional Medical was added as a campus of Tulane Medical Center. Under William’s leadership, Tulane Health System also expanded service lines including the opening of the Professional Athlete Care Clinic, an expansion of the Tulane Bone Marrow Transplant Unit, and creation of the Grace Anne Dorney Pulmonary and Cardiac Rehabilitation Center at Tulane Medical Center.

William earned his undergraduate degree from Tulane University and attended University of Texas Southwestern for medical school. Prior to pursuing his academic medical career, William enjoyed a busy private practice in Pulmonary and Critical Care Medicine which allowed him to cultivate expertise in clinical program development, procedure coding and reimbursement, training and credentialing, and medical economics. In 2004, after completing a fellowship in Interventional Pulmonary, William was recruited to Baylor College of Medicine where he became one of the founding members of Baylor’s Complex Airway and Pleural Disease Center and served as its first Director. After being promoted to Assistant Dean of Clinical Affairs at Baylor, William helped to improve operations and productivity in all of Baylor’s clinical enterprises. In 2009, William was recruited to Christus Health to serve as the Chief Operating Officer for the Northern Louisiana operations comprising three acute care hospitals, two wellness centers, and several outpatient clinics.

William is the recipient of numerous awards including the American College of Chest Physicians’ Young Investigator Award, and the Fulbright and Jaworski award for educational leadership. He has authored several book chapters and original articles published in various medical journals and has been guest faculty at numerous courses as well as national and international meetings.

William and his wife, Dr. Mary Lynn Lunn, have three daughters.

Zach McCluskey, CEO

Zach McCluskey serves as the Chief Executive Officer of Johnston-Willis Hospital. Zach joined the team in December 2016 and is responsible for the strategic growth and day-to-day focus of Johnston-Willis Hospital, a 292-bed facility and campus of CJW Medical Center.

Zach came to Johnston-Willis from Parham Doctors’ Hospital where he had served as Chief Executive Officer since May 2014. During his tenure, Parham Doctors’ Hospital grew admissions and earnings 37 percent and 41 percent, respectively. Parham was recognized as a Top 5% Orthopedic Hospital in the nation by Healthgrades and received total shoulder, hip and knee certifications from the Joint Commission. The hospital was also recognized for its Division leading patient and physician satisfaction performance.

A Richmond native, Zach has over 10 years of healthcare leadership experience within the HCA health system, following a career in critical care nursing. Zach received his Bachelor of Science in Nursing and a Master of Health Administration from Virginia Commonwealth University. He is also a fellow in the American College of Healthcare Executives.

Fred Ashworth

Fred Ashworth is the Chief Financial Officer for HCA Virginia's Chippenham and Johnston-Willis Hospitals, a 758-bed, two-campus hospital system part of HCA Healthcare's Capital Division in Richmond, Virginia.

Fred joined HCA as CFO at Orange Park, FL in 2013 and later in the same role at Regional Medical Center of San Jose before joining Los Robles in 2019. Prior to joining HCA, he served for 13 years as CFO in multiple locations for Health Management Associates.

Fred has a Bachelor’s in Business Administration from Georgia Southern University and is a CPA in West Virginia. Fred has served on the Florida LIP Council, and in California, he has served on the boards of Gold Coast Health Plan and Livingston Home Health Agency.

In his spare time, Fred enjoys spending time with his family, specifically his wife and kids. He also enjoys fishing, hunting, and good old-fashioned sports – which of course includes football.

Cathy Edmisten

Cathy Edmisten is the Chief Operating Officer of HCA Virginia's Johnston-Willis Hospital, a 292-bed facility and a campus of Chippenham & Johnston-Willis Hospitals.

Cathy earned her Master’s of Business Administration and a Bachelor of Arts degree in Public Administration, from St. Leo University, in addition to her Associate’s degree in Nursing from Pasco-Hernando State College. She is board-certified in healthcare management and a Fellow with the American College of Healthcare Executives (ACHE). Cathy brings with her an operational background gained at Oak Hill Hospital where she began her career with HCA Healthcare in 2011 as the Director of Emergency services before being promoted to Assistant Chief Nursing Officer and then VP of Operations. Cathy’s goal is to transform the delivery of healthcare services in the acute-care setting by ensuring all caregivers demonstrate a commitment to safety, hospitality, empathy, and efficiency.

Cathy resides in Richmond with her husband. She has four grown children and six grandchildren. As a Florida-native, she loves water activities, including boating, standup paddle boarding, and scuba diving.

Dr. Singh, Johnston-Willis Hospital’s Chief Medical Officer, previously served as chief medical officer of Terre Haute Regional Hospital, an HCA Hospital in Indiana. While there, he focused on improving quality outcomes, patient safety and medical staff relations.

Prior to serving as Terre Haute’s CMO, Singh was the hospitalist medicine director. In that role, he expanded the program by focusing on building positive relationships with local physicians and providing exceptional care and communication with all involved in the patients’ care. He also held roles such as medicine department chair, physician advisor and occupational medicine director, and served on a variety of committees including the utilization review, medical executive, clinical monitoring, physician relations, credentialing and the pharmacy & therapeutics committees.

Singh received his Bachelor of Medicine and Bachelor of Surgery at Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Pondicherry, India. He served as a resident for dermatology, sexually transmitted diseases and leprosy at JIPMER; and was a family medicine resident at Southside Hospital in Bay Shore, NY.