R'NEE MULLEN
CHIEF EXECUTIVE OFFICER

As the CEO for DLO, R'Nee 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. R’Nee joined DLO in 2008 and previously served as Chief Information Officer, directing DLO's Information Technology team, Patient Services, Customer Service and Business Development. In this role, she led the teams that provide services and solutions to support the delivery of accurate, reliable patient testing results to care providers. 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 and enjoys time spent with their horses and cattle and any opportunity to visit her daughters.

RACHEL DAVIDSON
REFERENCE LABORATORY OPERATIONS DIRECTOR

Rachel was named Director of Reference Laboratory Operations in March 2021. In this role, she provides direct oversight to the reference/commercial laboratory side of our clinical operations. Rachel joined the DLO team in 2002 as a Laboratory Assistant in Microbiology. Since that time, she has progressed upwards in the DLO organization serving as Microbiology bench tech and group lead, Quality Assurance Specialist, and most recently a multi-faceted leadership role where she served as Laboratory Manager over DLO’s Medical Technology Recruiting and Retention Program, Microbiology department, and two metro hospital locations. Rachel uses her energy and dedication to our organization to drive excellence in quality and service to the patients and clients we serve. She earned her Bachelor of Science in medical laboratory science from Northeastern State University. Rachel is married with one son and enjoys spending time at the pool or on the lake with family and friends.

TROY HITZEMAN
OPERATIONAL SUPPORT SERVICES DIRECTOR

Troy joined DLO in 2005 and serves as the Director of Operational Support Services, which includes DLO Patient Services, Logistics, and Customer Service/Solutions. Troy previously served as the DLO Patient Services Manager from 2005 until assuming his current role in March 2021. Troy embraces and leads a servant leadership culture to ensure each patient and client receives world class services. Troy earned his bachelor’s degree in biology from the University of Central Oklahoma and his master's in business administration from the University of Phoenix in Tulsa. He is married with a son and a daughter and enjoys golfing and spending time with his family and friends.

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.

JAYMIE JACKSON
SALES & MARKETING DIRECTOR

Jaymie has served as Sales Director since 2014 after joining DLO in 2007. In her current assignment, Jaymie is responsible for the sales and service team across the state. Before becoming Sales Director, Jaymie held a role as Quality Coordinator in Specimen Management along with various sales positions such as account executive, prescription drug monitoring and women’s health account executive and contract client specialist in long term care. Jaymie has a Bachelor of Science and is a medical laboratory technician. Prior to working for DLO, Jaymie worked in various hospital laboratories across Oklahoma.

LISA MCGHEE
HOSPITAL LABORATORY OPERATIONS DIRECTOR

As the Director of Hospital Laboratory Operations, Lisa oversees DLO laboratory operations for all the managed hospital laboratories across the DLO/INTEGRIS network. 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. Lisa previously served as the Laboratory Manager at INTEGRIS Baptist Medical Center. Since joining DLO in 2001, Lisa has held several leadership positions at DLO including Lab Generalist, Clinical Lab Supervisor at INTEGRIS Canadian Valley Hospital, and Regional Manager over multiple INTEGRIS hospital laboratories. Lisa has enjoyed being an active team member on past projects such as the opening of the INTEGRIS Cancer Institute, INTEGRIS Health Edmond, and Lakeside Women’s Hospital where she served as a leader in implementing lab services at each facility.

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. Under Jim’s direction, DLO has been recognized as one of the “Best Places to Work in Oklahoma” for 14 years in a row by The Journal Record. Prior to DLO, Jim served as director of employee relations at Autoquip Corporation. He earned his bachelor’s degree from Oklahoma Christian University and has a son and a daughter.

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 since 1992, 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.

BRANDI STORY
INFORMATION TECHNOLOGY DIRECTOR

Brandi joined DLO in 2006 and serves the company in leading the information technology department to ensure the reliable delivery of patient testing results to providers in a timely manner. Before becoming Director of Information Technology, Brandi served as a lab generalist at INTEGRIS Clinton Regional Hospital and then as lab supervisor for INTEGRIS Cardiovascular Physicians. She then moved to information technology in 2015 and served as the Hospital IT Manager leading the team that supports INTEGRIS electronic health record and laboratory information systems. Brandi earned a Bachelor of Science in medical technology and health science from Southwestern Oklahoma State University. She is married with one son and enjoys spending time with family and friends.