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 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 and worked with many charities. Dennis and his wife have two daughters. Together they enjoy off-roading, hiking, kayaking and cycling.

KIMBERLY (KIM) HOLLOWAY
CHIEF OPERATIONS OFFICER

Kim has served in the position of laboratory operations director since 2009 after joining DLO in 1990 from INTEGRIS Clinton Regional Hospital. Previous DLO positions include generalist, microbiology supervisor and manager of the core laboratory. In her current role Kim oversees all DLO laboratory operations including hospital sites and the core lab. 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. Kim earned her bachelor of science in medical technology from Southwestern Oklahoma State University. She is married with two teenage sons and enjoys spending time with her family at the lake, fishing and riding motorcycles.

JEFFREY (JEFF) MCCOWN
EXECUTIVE SALES DIRECTOR

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 two 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 football 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.

JUNE E.M. PHILLIPS
CHIEF COMPLIANCE OFFICER

June joined DLO in 2008 and serves as the chief legal and compliance officer. In this role, June oversees a rigorous compliance program that ensures DLO provides its customers with the best service and quality possible while meeting regulatory requirements. She also oversees the legal, contract and risk management processes. Prior to joining DLO, June worked in private practice as an attorney. She also has a masters in health administration from OU and worked in hospital administration many years before attending law school at the University of Tulsa. June is married and together with her husband enjoys traveling, hiking, camping, and spending time with family.

MADHUSUDAN RAO, M.D.
CHIEF MEDICAL OFFICER

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. 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 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.

WILLIAM (BILL) TARRON
CHIEF CUSTOMER OFFICER

Bill has been the director of field operations since the inception of DLO in 2000. Bill leads all functions that interact with DLO customers and patients including client services and solutions, patient services and logistics. His teams are focused on ensuring all clients and patients are receiving exceptional service, from having blood drawn to receiving accurate and timely results. Prior to DLO, Bill served in the same role with SmithKline Beecham (joining in 1990), which was acquired by Quest Diagnostics, a joint venture partner of DLO. Before that he managed the outpatient laboratory at St. Anthony and also owned a small, private lab. He started his career as a medical technologist at Baptist Medical Center. Bill earned his master’s in business administration at the University of Central Oklahoma and his bachelor’s degree in medical technology at East Central University in Ada. He is married and has both a son and daughter.