Executive Team

Since our inception in 1976, PRA has amassed a level of expertise that has enabled us to conduct complex global clinical trials across all therapeutic areas and provide outsourced clinical services across all phases of pharmaceutical and biotech drug development.

Our teams of experts are the core of the company promoting our forward-thinking culture with innovation, continuous attention to detail, constant quality improvement and a high priority approach to safety and timelines. Our pioneering mindset and specialist knowledge can make an enormous difference to your study.

Colin Shannon

President and
Chief Executive Officer
Colin Shannon is President, Chief Executive Officer (CEO) and Director of PRA. Since 2007, Mr. Shannon has served as President and Chief Operating Officer (COO) for PRA. Mr. Shannon has contributed significantly to the development of PRA's current mission and vision. As COO, he has been instrumental in driving PRA's decision-making processes and building a talented pool of clinical professionals. Prior to joining PRA, Mr. Shannon was Executive Vice President of Global Clinical Operations at Pharmaceutical Product Development, Inc. (PPD) where he oversaw clinical, biostatistics and data management operations worldwide. During his 12 year association with PPD, he held various leadership roles including COO for the company’s European division and Chief Financial and Administration Officer for Europe and the Pacific Rim. Prior to PPD, Mr. Shannon had more than 15 years of experience in a variety of financial and accounting positions in the utility and multimedia industries. Mr. Shannon earned his MBA from London's City University and is board certified by the Chartered Association of Certified Accountants.

Linda Baddour

Executive Vice President
and Chief Financial Officer
Linda Baddour was named Executive Vice President and Chief Financial Officer (CFO) in June 2007. She has a proven track record in managing the financial activities of a fast-growing, global clinical research firm. From 2002 to 2007, Ms. Baddour was CFO at Pharmaceutical Product Development, Inc. (PPD). During her tenure as PPD's CFO, the company posted greater than 20% annual revenue growth and industry-leading margins, while consistently meeting revenue and earnings targets. Ms. Baddour also managed M&A and information technology. Ms. Baddour earned her MBA from the University of North Carolina at Wilmington and is also a certified public accountant.

David W. Dockhorn

Executive Vice President
and Compliance Officer
David W. Dockhorn, Ph.D., serves as Executive Vice President and Compliance Officer and is responsible for the following global departments: Regulatory Affairs, Quality Assurance, the Project Management Office and Process Management. Prior to this role, Dr. Dockhorn served as PRA's Executive Vice President Product Registration—the Americas, where he was charged with directing PRA's operations in the Americas and delivering overall client satisfaction. Dr. Dockhorn has held several senior leadership positions at PRA, having joined in 1997 as Vice President of Operations and Regional Director of the Lenexa, KS, USA operations. Under his leadership, the Lenexa office became PRA's fastest growing and most profitable trials management center. Before joining PRA, Dr. Dockhorn worked for International Medical Technical Consultants, Inc., a Clinical Research Organization acquired by PRA in 1997. Dr. Dockhorn received his Ph.D. in neuroscience from Texas Tech University.

Tami Klerr

Executive Vice President, Business Development
Tami Klerr is Executive Vice President of Business Development. Ms. Klerr joined PRA from InfaCare Pharmaceutical Corporation where she held the position of Vice President of Clinical Operations. Prior to that, Ms. Klerr spent 13 years with Pharmaceutical Product Development, Inc. (PPD) in a variety of senior roles in business development, key account management and operations. Along with her extensive business development and operational skills, Ms. Klerr brings a strong portfolio of therapeutic experience. Ms. Klerr earned a BS from the University of Pennsylvania.

Harris Koffer

Strategic Solutions
Harris Koffer is President of Strategic Solutions at PRA. Prior to joining PRA, Dr. Koffer served in several roles at RPS including CEO, President and COO. He also served as Vice President, Clinical Trials and Pharmaceutical Business Development for Quest Diagnostics and Vice President and General Manager of Covance Clinical Services and President of Covance Periapproval Services. In these roles, he was responsible for global Embedded Clinical Development solutions, central laboratory services and full service clinical research and development capabilities for Phases I-IV of drug development. In addition to more than 30 years of experience in clinical drug development, he has served as Adjunct Assistant Professor of Pharmacy in Medicine at the University of Pennsylvania School of Medicine and Clinical Associate Professor of Pharmacy at the Philadelphia College of Pharmacy and Science. He earned both a BS in Pharmacy and doctorate of Pharmacy from the Philadelphia College of Pharmacy and Science (now known as the University of the Sciences in Philadelphia) and completed a fellowship in Clinical Pharmacology at Thomas Jefferson University Hospital in Philadelphia, PA, USA.

Sean Leech

Executive Vice President,
Product Registration
(Europe, Asia Pacific and Africa)
Sean Leech, serves as PRA’s Executive Vice President of Product Registration—Europe, Asia Pacific and Africa. Having joined PRA in October 2012, he is based out of PRA’s Reading, UK office and oversees more than 1,500 employees. His responsibilities include directing PRA's regional operations, organic growth, acquisitions, strategic management, business delivery and client relationships. Mr. Leech has more than 20 years of industry and general management experience with a proven global track record in the establishment and improvement of businesses across multiple clinical disciplines. A graduate of London’s Chartered Institute of Management Accountants, he devoted more than 10 years of his career serving in various leadership positions at ICON plc, including Chief Financial Officer, Executive Vice President and Divisional President.

Samir Shah

Chief Operating Officer
Strategic Solutions

Samir Shah serves as PRA Health Sciences’ Chief Operating Officer of the Strategic Solutions division. Offering years of significant industry experience, he is responsible for this division’s global operations, strategy and business functions. Mr. Shah joined the legacy RPS organization at its inception in 2000 before it was acquired by PRA in 2013. He was one of the key pioneers in the development and maturation of the Embedded sourcing model, creating market differentiation in the biopharmaceutical life science space. Mr. Shah’s expertise includes strategic sourcing, change management and optimizing effective governance and operating structures.

Prior to joining our team, Mr. Shah held various positions across clinical operations and business enablement in the biopharmaceutical industry at US Bioscience and Zeneca Pharmaceuticals and in the CRO sector at Theorom Clinical Research (formerly Biopharm/IBAH Clinical Services) and Parexel. In addition, Mr. Shah has served as a research scientist at the University of Pennsylvania Medical Center in the Department of Psychiatry. He has a BS degree from Saint Joseph’s University in Philadelphia.

Kent Thoelke

Executive Vice President, Scientific and Medical Affairs, Safety and Commercialization Services
Kent Thoelke is Executive Vice President, Scientific and Medical Affairs, Safety and Commercialization Services. Mr. Thoelke oversees scientific and strategic product development to empower project teams and promote the success of clients’ studies. Mr. Thoelke directs the following PRA divisions: Medical Affairs, Scientific Affairs, Global Feasibility, Medical Informatics, Patient Access and Recruitment Services, Investigator Networks, Orphan and Rare Diseases and the Infectious Disease Research Center. During his tenure at PRA, Mr. Thoelke has served as Vice President of Global Product Development Services and Senior Vice President of Scientific and Medical Affairs. Previously, he worked at Pharmaceutical Product Development, Inc. (PPD), where he held senior-level positions in hematology/oncology, global strategic drug development and corporate development. Mr. Thoelke is also a named inventor on numerous patents in high-dose radiotherapy for the treatment of hematologic malignancies. He has over 21 years of experience in the global drug development, diagnostic and device industries, offering specialized expertise in hematology/oncology studies. Having visited over 40 countries, he is familiar with the global drug development environment, and he has established relationships with therapeutic experts in numerous indications around the world. Mr. Thoelke has spoken widely regarding the current landscape of clinical trial recruitment and drug development timelines. A leader in the field of Medical Informatics, Mr. Thoelke focuses on leveraging data to maximize patient enrollment by selecting high-performing sites to minimize overall drug development timelines.

Michael Brooks

Executive Vice President, Product Registration, Americas
Michael Brooks serves as the Executive Vice President, Product Registration, Americas. He joined the PRA Health Sciences team in September 2014 and brings over 20 years of experience working across the full drug development life cycle in Product Development, Project Management, Operations, and driving strategic innovation. Mr. Brooks is accountable for overall client satisfaction, project delivery, staff development, continuous improvement, and innovation in the Americas. As a member of the corporate Executive Leadership team, Mr. Brooks participates in the development of PRA’s short- and long-term strategic direction, implements innovations and change, supports the hiring and continuous development of talent, and achieves corporate business and operational targets. He joins us from PPD where he held executive leadership positions in Project Management, Global Hematology and Oncology, and Site Intelligence and Innovation. Mr. Brooks holds a B.Sc. from North Carolina State University.