President and CEO
Kathryn Raethel, F.A.C.H.E., M.H.A., M.P.H., R.N., assumed the presidency of Castle Medical Center
on December 5, 2011.
Prior to this appointment, Raethel had been vice president for patient care
services at Castle for eleven years. During this time, she provided administrative direction
and clinical oversight of patient care at Castle, and she oversaw numerous departments, including
the nursing units, the Emergency Department, Quality Resources, and Risk Management.
Prior to joining Castle, Raethel was the vice president of professional services and COO at
Desert Valley Hospital in Victorville, California. She holds a master’s degree in public health
and a master’s degree in health administration from Loma Linda University in California.
Raethel and her husband, Hilton, have four adult children and live in Kailua.
Vice President, Patient Care, and CNO
In March of 2012, Laura Westphal, M.B.A., C.P.H.Q., R.N., became Castle's vice president
for patient care and chief nursing officer. Westphal has worked at Castle Medical Center
for twelve years and, prior to her appointment as vice president, was director of Quality
and Risk Management. She has been a lead at Castle's Cardiac Catheterization Lab and was
the hospital's first clinical information system coordinator.
In her nursing career, Westphal has worked in many roles, including as a manager in home
care, as a skilled nursing team lead, working in cardiac care, managing a cardiac
step-down unit, and working in electrophysiology. She holds a bachelor's degree in health
care from the University of St. Francis in Joliet, Illinois, and an M.B.A. in health care
from Loma Linda University.
Westphal lives in Kailua with her husband, Daniel, and has three adult children and
Vice President, Operations
Travis Clegg, M.B.A., began serving as vice president of operations at Castle in October of 2011.
Prior to this appointment, he was administrative director at Adventist Medical Center in Portland,
In his role in Portland, Clegg administered a satellite facility that included an imaging center,
laboratory, physical therapy department, and physician clinics, and oversaw two of the hospital’s
clinical departments and its centralized patient scheduling. His academic background includes a bachelor
of business administration degree from Southwestern Adventist University in Keene, Texas, and a
master of business administration degree from Portland State University.
Clegg, his wife, Hannah, and their young daughter live in Kailua.
Vice President, Finance, and CFO
Jeff Nye, M.B.A., became Castle’s vice president for finance and its chief
financial officer in September of 2014. Before coming to Castle, Nye was director
of finance at Feather River Hospital in Paradise, California. He held this post
for seventeen years, and he served as that hospital’s interim CFO from April
to September of 2013.
Nye holds a Bachelor of Business degree in administration and accounting from Pacific
Union College in Angwin, California, and an M.B.A. from the University of Phoenix
in Phoenix, Arizona. After graduating from Pacific Union College, Nye began his career
with Adventist Health at Hanford Community Hospital as its chief accountant. After
five years there, he accepted the directorship at Feather River Hospital.
Nye lives in Kailua with his wife, Michelle, and they have a daughter and son.
Alan H.S. Cheung
Vice President, Medical Affairs
Alan H.S. Cheung, M.D., M.B.A., F.A.C.S., began serving in the newly created position of vice
president of medical affairs in January, 2009. He has been on the medical staff of Castle Medical
Center since October, 1992.
Dr. Cheung is a general and transplant surgeon working with Surgical Associates, Inc., with
offices in Kailua and Honolulu. He received his medical degree from Harvard Medical School in
Boston, completed his internship and general surgery residency at the University of Washington,
and was awarded a transplant fellowship by the University of Minnesota Medical School. He holds an
M.B.A. in health care administration from the School of Public Health of Loma Linda University
Dr. Cheung is currently the president of Surgical Associates, Inc., and is a clinical professor
of surgery at the John A. Burns School of Medicine of the University of Hawai‘i. He was voted
one of the “Best Doctors in Hawai‘i” in 2009. He and his wife, Alyson, have a
daughter and son and live in Kailua.