President and Chief Executive Officer
Wesley Medical Center
Bill Voloch is the president and chief executive officer at Wesley Medical Center. He is an innovative leader with more than 14 years of experience in hospital management.
Prior to joining Wesley, Voloch served as the chief financial officer at the Medical Center of Aurora in Colorado. He began his career with HCA in 1993 at Michael Reese Medical Center in Chicago.
Voloch graduated from Indiana University with a Bachelor of Science degree in accounting, and he and received his Master of Business Administration degree from Regis University.
Voloch has volunteered with the Rotary Club, as a Cub Scout den leader and with the Multiple Sclerosis Society.
He and his wife, Juli, have three sons and two daughters.
Lowell Ebersole, DO
Chief Medical Officer
Lowell Ebersole is the chief medical officer
for Wesley Healthcare.
Ebersole graduated from the Via Christi Family Practice residency program in 2004 and began working as a hospitalist. He worked for Kansas Inpatient Services at several facilities including Wesley Medical Center. He became the medical director of Via Christi’s hospitalist program in 2013, serving as a hospitalist for Via Christi and Sound Physicians through 2018.
He graduated from Bethel College in Newton, Kansas, with a bachelor’s degree in chemistry. He received his doctor of osteopathy from Des Moines University in Des Moines, Iowa.
He and his wife, Patresa, have four children.
Jane Ritter, RN, MA, NEA-BC
Chief Nursing Officer
Jane Ritter is the chief nursing officer for Wesley Healthcare. She brings more than 18 years of experience in nursing leadership to her role, having most recently served as vice president of Patient Care Services and chief nursing officer at United Regional Health Care System in Wichita Falls, Texas.
A registered nurse for more than 30 years, Ritter holds a bachelor’s degree in nursing and a master’s degree in nursing administration from the University of Iowa. She is enrolled in the Doctor of Nursing Practice program at the University of Texas at Arlington, and is also board certified as Nurse Executive - Advanced.
Ritter and her husband, Karl, have two children. She enjoys spending time with her daughter, an attorney in Albuquerque, New Mexico, supporting her son’s school activities, and walking their Australian Shepherd, Oso.
Chief Financial Officer
Nicole Castleberry is the chief financial officer for Wesley Healthcare.
Castleberry comes to Wesley after serving as the chief financial officer at HCA’s Lakeview Regional Medical Center in Covington, Louisiana. HCA is Wesley’s parent company. At the 167-bed Lakeview facility, Nicole was responsible for all financial areas including accounting, supply chain, medical records, revenue management, case management and patient access. She also has served as a vice president and controller/market director for finance at Parkridge Health System, and as an accounting manager and senior accountant at Life Care Centers of America, both in Tennessee.
Castleberry graduated from the University of Tennessee with a bachelor’s degree in finance and a master’s degree in business administration.
She and her husband, Chad, have two daughters.
J. Kolbe Sheridan
Chief Operating Officer
J. Kolbe Sheridan is chief operating officer (COO) for Wesley Healthcare. He returned to Wesley in 2020 after having served as an Administrative Resident and Fellow, then as Chief Staffing Officer and Night Administrator, at Wesley from 2011-2013. In the interim, he served as assistant chief executive officer (CEO) at Heartland Regional Medical Center, Marion, Ill., and COO at both Affinity Medical Center in Massilon, Ohio, and Gateway Regional Medical Center in Granite City, Ill. Most recently, Sheridan served as CEO at Barstow Community Hospital, Barstow, Calif.
After earning his Bachelor of Science degree in biology from Niagara University, Lewiston, New York, Sheridan received his Master of Health Administration degree from Virginia Commonwealth University – Medical College of Virginia.
Sheridan is an avid skier, runner, golfer and mountain biker, and enjoys college and professional sports. He and his wife, Tobi, have an English Bulldog, "Zeelo", and a Great Dane, "Zuzu".
Vice President of Human Resources
Lisa Clark is Vice President of Human Resources, joining Wesley Healthcare with more than 25 years of experience in Human Resources. Twenty of those years were spent in the healthcare and mental health services industries – most recently as Human Resources Director at Willamette Valley Medical Center, an acute care hospital in McMinnville, Oregon.
After receiving her Bachelor of Science degree in Business Administration from Nebraska Wesleyan University in Lincoln, Nebraska, Clark earned her Master of Health Care Administration degree from Colorado State University – Global Campus in Englewood, Colorado.
Clark thrives on helping colleagues through difficult work and life issues and building strong teams that create solutions for today’s healthcare challenges. In her free time, she enjoys camping, hiking, boating, dirt biking, skiing and visiting the family’s ranch. She and her husband, Scott, have two sons.
Jeremy Pauly is the associate administrator of Wesley Medical Center.
Pauly joined Wesley in 1999 as an emergency medical technician. He received his bachelor’s degree in nursing from Wichita State University and transitioned to an emergency room staff nurse in 2000. In 2006, Wesley opened its first freestanding emergency room, Wesley West ER, and Pauly was promoted to manager at that facility. Pauly has served as director of nursing for Wesley’s main emergency room, Wesley Pediatric ER and Wesley West ER. He was promoted to market director of Wesley’s emergency services in 2016 and then associate administrator in 2018.
Jeremy and his wife, Lacy, have a son.
Tim Barker, MHCL, OTR/L
With more than 22 years of experience at Wesley Healthcare, Barker is well embedded in hospital operations. He began his career at Wesley in 1999 in outpatient therapy, and quickly rose through the ranks to become manager and then director of Wesley’s rehabilitation services department. Currently, Barker oversees Wesley’s rehabilitation services, environmental services, security, food and nutrition services, linen, volunteer and property management areas.
Barker graduated from Newman University in 1999 with a bachelor’s degree in Occupational Therapy, and went on to earn a master’s degree in Healthcare Leadership from Friends University in 2017.
Barker and his wife, Cheryl, have a daughter and two sons, and he enjoys traveling, hunting, cooking and church activities outside the office.
Vice President of Surgical Services
Brian Swallow is the vice president of surgical services for Wesley Healthcare and leads the system’s surgical quality, service and growth initiatives. He is an experienced professional with more than 15 years of experience in management of surgical services.
Swallow graduated from Butler County Community College with an associate degree of nursing, and he received his bachelor’s degree in nursing and his master’s degree in business administration from Southwestern College.
Brian and his wife, Denise, have three children and five grandchildren.
Vice President of Finance
Kellie Williams is the vice president of finance for Wesley Healthcare. Williams comes to Wesley from the Medical Center of Plano/Medical City Frisco, an HCA facility located in Plano, Texas, where she served as the vice president of finance. She has also held the positions of financial controller at Dallas Regional Medical Center in Mesquite, Texas, and assistant controller at Plaza Medical Center of Fort Worth in Texas.
Williams graduated from Midwestern State University with a bachelor’s and master’s degree in business administration.
Williams has previously served as a member of Hope’s Door Financial Council and Hughston Elementary PTA, as well as coached an Upward youth basketball team.
She and her husband, Kent, have two sons.
Vice President of Business Development
James Stepien is the vice president of business development for Wesley Healthcare and works collaboratively across the Wichita market to lead and develop business strategies for services, facilities and operations at Wesley.
Stepien previously served as one of Wesley’s physicians relations and outreach managers, where he was instrumental in signing more than 50 rural Kansas hospitals to affiliation agreements providing partnership opportunities to Wesley Healthcare.
Prior to joining Wesley, Stepien worked as an income development specialist with the Wichita chapter of the American Cancer Society and then as a heart walk director for the Wichita chapter of the American Heart Association.
Stepien graduated from Friends University with a bachelor’s degree in business administration and a master’s degree in healthcare leadership.
Stepien’s community activities have included serving as a volunteer for Wichita’s Child Advocacy Center, March of Dimes, Dream Big Association and Hope Community Church.
He and his wife, Tiffany, have one daughter.
Quality & Infection Prevention
Sandy Schremmer is the vice president of quality and infection prevention for Wesley Healthcare.
Schremmer began her nursing career at Wesley as a nurse tech in Wesley’s Post-Anesthesia Care Unit (PACU), later worked in Wesley’s Cardiac Intensive Care Unit (CICU), and served as a manager of Wesley’s Ambulatory Surgery Unit (ASU) and Pre-Op clinic. Schremmer than joined Via Christi hospitals serving in a variety of clinical roles from a manager of the medical-surgical and intensive care unit to director of patient safety and quality. She most recently served as a senior consultant and clinical performance partner at Premier, a healthcare management-consulting firm.
Schremmer graduated from Butler Community College in El Dorado, Kansas, with an associate’s degree in nursing and received a bachelor of science in health information management from the University of Kansas in Lawrence. She earned her master’s of business degree in health care leadership from Capella University in Minneapolis, Minnesota. Schremmer is certified in professional health care quality and is a Lean Six Sigma Greenbelt.
She and her husband, Doug, have an adult son and daughter.