Our Leadership

Steve Burriss


Steve Burriss serves as President of UNC REX Healthcare, an affiliate of UNC Health Care. From April 2012 to April 2015 he served as the chief operating officer at UNC REX, and oversaw all operations at the 660-bed organization, at six locations in Wake County, with more than 5,400 co-workers.

Prior to his role as COO, Steve served as senior vice president of operations and ambulatory services, managing a variety of areas, including UNC REX Cancer Center, heart and vascular services, physician services and ambulatory services. Under Steve's leadership, UNC REX added three new health campuses, two joint ventured surgery centers and more than 150 physicians.

Steve joined UNC REX Healthcare in 1998 as director of human resources and was later promoted to vice president of human resources. Steve was named a “COO to know” by Becker’s Hospital Review in 2013 and received recognition from the Triangle Business Journal as “40 Under 40.” During his tenure, UNC REX was highlighted as one of the Top 50 Hospitals in the U.S. by Becker’s Hospital Review. In 2017, Steve was also named one of the Top 100 CEO’s to Know by Becker’s.

Steve takes an active role in the Triangle community. He has served on the executive leadership team for the American Heart Association, the board for the Leukemia and Lymphoma Society, the executive leadership committee for Light the Night Walk, the board of directors for the Cary Chamber of Commerce and the Health Care Works Coalition. He served as the 2015 March of Dimes’ Triangle March for Babies Chairman.

Steve earned a Bachelor of Science degree in Business and an MBA from Marshall University.

Ernie Bovio

Chief Operating Officer

Ernie Bovio oversees the daily operations for UNC REX, as well as several joint ventures and other activities. He joined UNC REX in the Fall of 2018.

Ernie has had a long and successful career in hospital management in Texas and elsewhere. In 2014, he took over as CEO of High Point Regional and led that organization through several years of growth, clinical improvement and financial stability as part of the UNC Health Care system.

Ernie holds a Masters of Healthcare Administration and Business Administration from the University of Houston and a Bachelor of Arts in History from Texas A&M University. He and his wife Holly have four children.

Tate Bombard

Vice President of Legal Affairs
Tate oversees all internal and external legal functions at UNC REX Healthcare. Prior to this role, Tate served as the Executive Director of Physician Administration and Associate General Counsel at UNC REX Healthcare. He has been a UNC REX co-worker since 2010.

He currently serves on the Magellan Charter School Board of Directors, and is a Fellow in the Healthcare Roundtable for General Counsel. Tate received both his Juris Doctor and Bachelor of Science degree from the University of South Carolina.

Tate enjoys golf, travel, hiking and snow skiing.

Linda Butler, MD

Vice President of Medical Affairs/Chief Medical Officer/Chief Medical Information Officer

Linda is responsible for the UNC REX medical staff, quality programs and regulatory compliance. She was a pediatrician in Wake County for more than 13 years before joining UNC REX as chief medical officer in 2009.

Linda serves as a John Rex Endowment Board Member and Finance Committee Member. She is also on the boards of Raleigh Bicycle/Pedestrian Advisory Commission and Capital Care Collaborative. In 2012, she participated in Leadership NC as a member of class class XIX and was named to the Top 100 CMO’s to Know by Becker’s twice in 2013 and 2014. UNC REX CMO Linda Butler named "100 Hospital and Health System CMOs to Know," by Becker’s Hospital Review in 2013 and 2014.

She earned degrees in Nuclear Engineering from N.C. State University and University of Florida, and received her medical training at UNC Chapel Hill.

Linda enjoys cycling, traveling and cooking.

Sylvia Hackett, SPHR

Vice President of the Rex Healthcare Foundation

Sylvia leads the Foundation’s fundraising efforts for UNC REX Healthcare.  In addition, she oversees the hospital’s 1200-person volunteer services function, and UNC/REX’s five-star onsite child development center. Prior, she led the Human Resources function as Vice President. She joined UNC REX in 1999.

As a member of the Rotary Club of Raleigh, she is an active volunteer on community service projects. She is currently a board member of Dress for Success, Triangle Family Services and Food Bank of Central and Eastern NC.  Past board and leadership affiliations include Triangle United Way, Poe Health Center, YWCA, Wake Education Partnership and March of Dimes. She is a TBJ Women in Business award winner and actively serves as a coach and mentor. 

Sylvia has a bachelor’s degree in Business Administration and a master’s degree in Organizational Leadership and Change.

Joel Ray, MSN, RN, NEA-BC

Vice President of Patient Care Services/Chief Nursing Officer

Joel received his BSN from Arkansas State University and MSN in Adult-Health Nursing from Arizona State University. He served in U.S. Air Force Medical Service for 26 years before retiring as Colonel in 2008 and then served as the Director of Surgery Services at UNC Hospitals for five years.

Joel is a member of the American Organization of Nurse Executives and a published contributor to nursing journals. He currently serves on the Board of the Alice Aycock Poe Center for Education and was honored with the Faye L. Miller Distinguished Service Award in 2017.

Joel enjoys music, travel, cooking and spending time with family and friends.

Bob Ricker, RRT, MBA

Vice President, Physician Services

Bob Ricker is the Vice President of Physician Services at UNC REX Prior to this role, Bob served as the Executive Director of Operations with UNC Physicians Network and the Associate Vice President of Suburban Services at UNC REX. He has been a UNC REX co-worker since 1991 and currently serves on the Board of the Wake County Medical Society Community Health Foundation Board Treasurer and on the Board of UNC Physicians Network.

Bob received his Masters of Business Administration from Pfeiffer University in 2000, and his Bachelors of Science Degree from Greensboro College. He is a Registered Respiratory Therapist, and past NC Society for Respiratory Care President & National Delegate to the American Association of Respiratory Care. Bob served in the Marine Corps from 1976-1980. He actively serves on the Board of Directors for the Community Care of North Carolina.

Kirsten Riggs

Vice President, Heart & Vascular Services

Kirsten is responsible for the oversight, management, and strategic planning of the UNC REX Heart & Vascular division. Kirsten joined UNC REX in 1998 and has held prior leadership roles in surgical services and ambulatory administration.

Kirsten serves on the Alliance Medical Ministry Board and the North Carolina Heart & Vascular Research Board. She has a Bachelor of Science in Nursing from East Carolina University and an MHA from Pfeiffer University.

Kirsten enjoys reading, interior design, and spending time with her family.

Lisa Schiller

Chief Communications and Marketing Officer, UNC Health Care and UNC School of Medicine

Lisa leads communication and marketing for UNC Health Care and the UNC School of Medicine. She joined the health care system in 2006.

She serves on the Greater Raleigh Chamber of Commerce's Government Affairs and Inter-city committees, Raleigh Professional Women's Forum, Holt Brothers Foundation Board of Directors, Society for Healthcare Strategy & Market Development (SHSMD) Board of Directors, Healthcare Executive Forum, and is an honorary member of Alpha Kappa Psi – Eta Omega Chapter. Lisa received her bachelor's degree in communication from James Madison University.

Lisa enjoys spending time with her daughters, husband, and Golden doodles. She also likes golfing, cooking, and attending sporting events and concerts.

Tammie Stanton, RN

Vice President of Post Acute Services for the UNC Health Care System

Tammie is responsible for the leadership and strategic planning for Home Health, Hospice, Inpatient and Outpatient Rehabilitation, and Skilled Nursing Facilities. Tammie also oversees the WakeBrook Mental Health Center in Wake County, and serves on the Wake County Mental Health Stakeholders Committee and the Crisis Cooperative Team.

She is on the UNC School of Medicine’s Innovations Committee, the N.C. Telehealth Task Force and the Geriatrics Advisory/Executive Board for UNC Department of Medicine. Tammie is also on the Board of Directors of Alliance Medical Ministry in Raleigh and the Charles House in Chapel Hill.

Outside of work, Tammie loves spending time with her family, doing yard work and learning to play golf.

Sean Tehrani, MD

Vice President, Regional Hospitalist Services & Neurosciences Service Line
UNC REX Healthcare
CEO, Med-X Consulting, Inc.

Sean oversees the Hospitalist programs at UNC REX Healthcare in Raleigh N.C., Wayne Memorial Hospital in Goldsboro, N.C., and Johnston Health’s hospitals in Smithfield, N.C. and Clayton, N.C.  He also oversees the Neurosciences Service Line at UNC REX Healthcare.  He joined UNC REX as Medical Director of the Hospitalist team in 1999 and subsequently joined the executive team in 2014.

Sean is passionate about operational efficiency of hospitalist programs and hospitals at large.  He has expertise in length of stay management, hospitalist staffing models, patient satisfaction, and quality improvements.  He has developed many innovative projects to reduce length of stay.  He uses regression analysis and system dynamics to find “bottle necks” in patient through put.  The hospitalist programs at UNC REX Healthcare and Johnston Health have the lowest LOS/GMLOS difference in all of UNC Health Care System hospitals.

Sean has served on numerous medical staff committees and is the past Chairman of the Department of Medicine and former Medical Director of Information Technology at UNC REX Healthcare.  He is a board member of the REX Health Ventures, an innovation platform that fosters new technologies and companies in the healthcare sector.  He also is a member of the Board of Trustees for Urban Ministries (non-profit organization that provides free healthcare to the poor in Wake County, NC) and serves on its finance committee.

In 2017, Sean started Med-X Consulting, Inc., which provides expertise in hospitalist team operations. 

Sean lives in Raleigh with his wife of 18 years and two daughters.  He plays tennis, soccer, and the piano in his free time.

Roy Tempke, MHA, NHA, PT

Vice President, Care Transitions

Roy joined UNC REX in 1993 as a physical therapist and has served in a number of leadership roles, including administrator for the two UNC REX skilled nursing facilities and as director of care management.  In his current role, Roy is responsible for rehabilitation services, the skilled nursing facilities, care management and discharge planning, respiratory therapy, palliative care, psychiatry, and care re-design. 

Roy serves on the board of directors for NAMI Wake County and is a volunteer reader for Partners Read in conjunction with the WakeEd Partnership. 

Roy earned his Bachelor of Science with a certificate in physical therapy from the University of Pittsburgh and his Masters in Healthcare Administration for the University of North Carolina at Chapel Hill. 

Roy lives in Cary with his wife and two sons.  When not watching hockey, Roy enjoys cooking, running  and traveling.

Tom Williams

Vice President, Ambulatory Services, Support Services and COO of the Holly Springs Hospital

Tommy joined UNC REX in 2000 and has served in a number of roles, currently as vice president of ambulatory services where he is responsible for the strategic planning, development, and operations of the UNC REX suburban facilities.  He is also vice president over the day to day operations of the UNC REX facility and support services.  He was recently named COO of the new Holly Springs Hospital which is scheduled to be completed in 2021.  In his new role, he will work closely with the UNC REX construction team and in the community as this hospital campus expands. Williams will maintain his current responsibilities with a planned transition over time. He started his career in healthcare as a respiratory care practitioner.

He currently serves on the Transitions LifeCare, founded as Hospice of Wake County, Board of Directors and on the Holly Springs Chamber of Commerce Board of Directors.

Tommy earned his bachelor's degree in business administration from N.C. Wesleyan College and his Master's in Health Administration from Pfeiffer University.

Tommy enjoys spending time with his wife and two children.

Andy Zukowski

Chief Financial Officer, UNC REX Healthcare

As Vice President and Chief Financial Officer of UNC REX Healthcare, a large community health system in a fast growing market with more than 6,500 co-workers and revenue of almost $1.5 Billion, Andy is passionate about the strategic, financial and business related processes that enable our mission of “inspiring hope, improving health and healing communities” and our vision of “leading the transformation of health care, one person at a time”.

Andy is a servant leader with a calm, forward thinking and analytic approach to achieving results. It is through his focus on relationships, development of others, and his engaging style of communication that he is able to seek input on key decisions and strategies that guide our transition to value; navigate health care challenges facing our community; and achieve organizational success.

He sits on the WakeEd Partnership Board, enjoys his family, traveling, music and outdoor activities.