"Providing superior quality services directly impacts our ability to meet and exceed client expectations for safety, compliance, integrity of data and efficiency," said Mr David Grange, CEO of PPD. "Having led quality assurance initiatives for pharma companies for more than 20 years, Dr McCullough brings exceptional leadership skills and quality expertise that enhance our ability to deliver for clients in today's changing drug development environment."

Prior to joining PPD, Dr McCullough spent nine years at Pfizer. He most recently served as senior director of the global research and development division good clinical practice and good laboratory practice quality assurance leadership team. His responsibilities included designing and implementing a risk-based approach to quality assurance to target audits across all functional areas of global clinical development.

Prior to joining Pfizer, Dr McCullough served as a consultant to GlaxoSmithKline's division of manufacturing, where he implemented standards, procedures and policies to meet regulatory requirements. He was also site technical director at Polychem Limited and began his career as a manufacturing quality assurance laboratory technician at Beecham Group.