Dr. Mark B. Berger – President and Chief Medical Officer

Dr. Mark Berger was born in Houston and attended the University of Texas where he graduated with highest honors. He then studied medicine at Baylor College of Medicine, graduating with honors and as a member of the Alpha Omega Alpha Medical Honor Society. He has been a licensed physician in Texas since 1981 and is […]

Wendy Sullivan, RN – Vice President of Project Implementation

Wendy Sullivan, RN, is Vice President of Project Implementation and Health and Safety Consultative Services for PPD. She joined PPD in October 2007 to fulfill her passion in improving commercial drivers’ well-being, particularly through implementing integrated and comprehensive sleep apnea programs within the transportation industry. In her occupational medicine leadership role at Schneider National, Wendy […]

Lisa Oberholz, MBA – Vice President of Operations

Lisa Oberholz¬†recently joined PPD as part of the growth and operational development for the organization. Lisa has an Undergraduate Degree in Business Administration and a Masters Degree in Business Administration (Cum Laude) with an emphasis in Operations Management. She has led and managed for 14 years utilizing her knowledge and expertise in all facets of […]

Layna Steed – Vice President of Organizational Development

Layna Steed joins PPD as the Vice President of Organizational Development with over 10 years of experience in health care management and operations. Layna previously served as the Director of Administrative & Ambulatory Operations at Houston Orthopedic and Spine Hospital (HOSH). She used her change management skills to transform multiple departments throughout the hospital and […]

Alan Coburn – Director of Sleep Diagnostics and Network Logistics

Alan Coburn is the Director of Sleep Diagnostics and Network Logistics for Precision Pulmonary Diagnostics. Alan joined PPD in 2010. He currently serves in the Reserves and has a military logistics background and over 20 years of management experience. Alan’s responsibilities include sourcing and establishing new partner facilities to accommodate a geographically diverse network, inventory […]