Oklahoma Leadership

Commerce Healthcare

Darren Walkup is a Sr. Vice President in the Commercial Bank at Commerce Bank and leads the Commerce Healthcare division for Oklahoma. Darren’s primary responsibilities include relationship management of current relationships as well as expanding Commerce’s Healthcare service offerings to all healthcare institutions across the State of Oklahoma. He received his BA in Finance from the University of Oklahoma in Norman and has an MBA in Accounting from Rockhurst University in Kansas City, MO. Before attending college, he served 5 years active duty in the United States Army. Darren currently serves on the Board of OK HFMA as well as the Board for the Community Food Bank of Eastern Oklahoma and is a past Board member for Tulsa Historical Society and the Arts & Humanities Council of Tulsa (now known as AHHA). 

Northeastern Health System

Priacilla is the Vice President of Finance at Northeastern Health System and has over 25 years’ experience in the healthcare industry.  She has been a member of HFMA for over 8 years.  Priacilla enjoys spending time with family and traveling.  In her spare time, you will often find her at the ballfields watching her nephews play or at the lake.

Stillwater Medical Center

Karen is the Director of Patient Financial Services for Stillwater Medical in Stillwater, Oklahoma.  She loves all things accounts receivable and is passionate about the patient billing experience.  She is also passionate about her poodles, her new old-house fixer-upper, and the latest RPDR franchise.

OU Health

Lisa Postelwait is Vice President of Finance at OU Health and has primary responsibility for the financial planning and analytics functions.  Lisa has been a member of HFMA for over 20 years and new to the Oklahoma chapter after relocating from Texas.  In her spare time, Lisa enjoys gardening, home improvement projects and spending time with family and friends.

INSURICA

Phillip is INSURICA’s Healthcare Practice Group Leader. From his years of experience in the Healthcare industry, Phillip protects the assets of healthcare professionals, hospitals, and facilities through risk management and insurance solutions. Phillip is also an adjunct instructor at the University of Central Oklahoma and Mid-America Christian University where he teaches insurance and risk management, healthcare policy, management and leadership, and organizational behavior with a key focus on business ethics.

Forvis Mazars

Jessica is a Director with Forvis Mazars in Tulsa, Oklahoma working as an auditor alongside her hospital and healthcare clients throughout the state.  She enjoys traveling with friends and family and especially trying new and unique restaurants on her journey.  But when she’s not out on the town, you can find her on the couch reading and cuddling with her two cats, Tonks and Minerva.