DENNIS HOGLE
CHIEF EXECUTIVE OFFICER

Dennis came to DLO from Quest Diagnostics in 2017. As the CEO for DLO, Dennis leads the senior management team to ensure all DLO employees proudly fulfill their commitments of accurate and timely results to serve Oklahoma’s physicians and patients. He has more than thirty years of experience in the lab industry, beginning his career with Quest as a Lab Assistant working 3rd shift in auto-chemistry and working his way up to management roles. Dennis completed his college degree while working full time and raising a family and went on to achieve a Master’s Degree in Organizational Management. His fellow employees will tell you Dennis is a servant leader who has successfully led teams through acquisitions, facility transitions and business transformations. Prior to joining Quest, Dennis served with distinction in the US Navy and spent 4 years on the USS Constellation. He also believes in giving back to his community. He has participated in and led several mission trips to Cambodia, worked with many charities and has active seats on both the Oklahoma American Cancer Society and Good Shepard Boards. Dennis and his wife have two daughters and have recently added the distinction of grandparents x3 to their bio. Together they enjoy relaxing at the cabin, hiking, kayaking and spending time with our grandsons.

KIMBERLY (KIM) HOLLOWAY
CHIEF OPERATIONS OFFICER

Kim has served in the position of Chief Operating Officer since 2009 after joining DLO in 1990 from INTEGRIS Clinton Regional Hospital. Previous DLO positions include generalist, microbiology supervisor and manager of the central laboratory. In her current role Kim oversees all DLO laboratory operations including hospital sites and the central lab as well as DLO’s logistics fleet. Her emphasis is to ensure the highest standards of quality, compliance and turnaround to exceed the expectations of DLO clients and patients, while maintaining efficiencies. Under Kim's leadership, DLO has ranked #1 in Quality Metrics in four of the last five years for all Quest Diagnostics business units. Kim earned her bachelor of science in medical technology from Southwestern Oklahoma State University. She is married with two sons and enjoys spending time with her family at the lake.

JEFFREY (JEFF) MCCOWN
EXECUTIVE DIRECTOR SALES & MARKETING

Jeff joined DLO in 2013 as executive sales director. Jeff leads the sales and marketing teams for business growth and retention, and to ensure physicians, clinics and hospitals across Oklahoma can meet the needs of their practices and their patients through the laboratory services that DLO offers. Jeff joined DLO as a seasoned health care and laboratory professional following a successful 28-year career with Abbott Diagnostics. He held numerous positions within Abbott with increasing responsibilities in sales, sales management, marketing, operations and client support. Jeff also spent three years leading sales and business operations in the southern region for WMS. Jeff earned his bachelor’s degree from Oklahoma State University (OSU) and remains a passionate OSU fan. Jeff is married with two daughters.

JAMES (JIM) MCKISSICK
CHIEF PEOPLE OFFICER

Jim has served as director of human resources at DLO since 2000. Jim leads the human resources team in all employee relations matters from recruiting and hiring to benefits and training. Jim’s primary goal is to create and maintain a working environment that continues to attract the best employees in healthcare, understanding that happy employees result in satisfied clients and patients. For seven years straight DLO has been recognized as one of the “Best Places to Work,” sponsored by OKC Business Magazine. Prior to DLO Jim served as director of employee relations at Autoquip Corporation. He earned his bachelor’s degree from Oklahoma Christian University, is married and has a son and a daughter.

R'NEE MULLEN
CHIEF INFORMATION OFFICER

R’Nee joined DLO in 2008 and serves as director of information technology. In this role, she leads the teams that provide efficient information technology solutions to support the delivery of accurate, reliable patient testing results to care providers. Her teams also develop technology integration solutions for care providers allowing them to easily access patient and testing information. R’Nee previously served as IT applications director at INTEGRIS Health and as vice president and chief information officer at Magic Valley Regional Medical Center. She earned both her MBA and her bachelor’s degree in computer science from Southwestern Oklahoma State University. R'Nee is married with three daughters who are active in rodeo competition, basketball and softball.

MADHUSUDAN RAO, M.D.
MEDICAL DIRECTOR

Dr. Madhusudan Rao became medical director of the DLO in 2017. He has been practicing anatomic and clinical pathology for 24 years, and has been medical director of a number of hospital laboratories managed by DLO for several years. The medical director’s responsibility is to ensure that the laboratory provides accurate and reliable patient test results. Dr. Rao received his medical degree in India, residency training in pathology at Monmouth Medical Center in New Jersey, Master of Public Health degree from Yale University, and fellowship training in cancer prevention at the National Cancer Institute. Dr. Rao is contracted with AmeriPath, a leading national provider of anatomic pathology, dermatopathology and molecular diagnostic services owned by Quest Diagnostics. He is married and has two daughters.

LEO SELL
CHIEF FINANCIAL OFFICER

Leo joined DLO in 2002 and serves as the company’s chief financial leader responsible for safeguarding company assets and leading the finance, billing, contracting and materials departments. Leo provides financial support to all departments to ensure DLO delivers quality in its products and services while driving growth. Prior to joining DLO he practiced public accounting and then held finance management positions with both Fleming Companies, Inc., and Bakers Supermarkets. Leo earned his bachelor’s degree in accounting from the University of North Dakota and is a member of the AICPA. He is married with a son and a daughter and enjoys golfing, fishing and spending time with family and friends.