Our leadership team in Houston has deep experience in the pharma and biotech industry. To see other members of the global Precision team.


Chad Clark


Recognized industry leader focused on combining cutting-edge technology, strategic program design, and operational excellence to help life sciences companies effectively address the increasing evidence demands and need to accelerate research initiatives. Previous experience spans the execution of phase I-IV clinical trials, specialty lab services, biospecimen logistics and banking, risk management, and patient support initiatives.


Darren W. Davis, PhD

Senior Vice President

Visionary leader in biotechnology and clinical translational research. Successfully developed and commercialized innovative “liquid biopsy” solutions to accelerate biopharma decision making, speeding advancement of drug candidates to the regulated clinical market. Developed a proprietary rare cell technology, ApoStream, in collaboration with the National Cancer Institute, then expanded globally by establishing subsidiaries in Europe and China. Known for building high-performance leadership teams with a global presence. Author or co-author of over 100 peer-reviewed publications. Holds a doctorate from the University of Texas Health Science Center School of Biomedical Sciences and M.D. Anderson Cancer Center.


Deborah Phippard, PhD

Senior Vice President

Pharma industry veteran and expert at biomarker-driven clinical trial design and execution. Led biomarker and drug development programs for pharmaceutical and diagnostics companies, as well as the National Institutes of Health. Spearheaded the discovery of pharmacodynamic biomarkers and novel targets for inflammatory disease therapy.


Joseph Bower, PhD, MBA

Vice President, Lab Operations

Experienced senior leader spanning the academic, pharmaceutical, and CRO industries. Specific expertise in biotherapeutics and vaccines for preclinical and clinical development programs and in identifying the appropriate immunochemistry assays for new development programs. Broad record of accomplishment leading global teams, delivering business strategies, developing business, and ensuring operational excellence.


Scott Marshall, PhD

Managing Director, Translational Informatics & Diagnostic Science

Extensive industry expertise across the pharmaceutical and biotech space — Dx regulatory submissions, translational informatics, biomarker R&D — with a focus in precision medicine-guided efforts as well as strategy development and medical device/diagnostic development. Globally responsible for translational informatics R&D efforts. Has led the development of novel methodologies for patient stratification and biomarker guided clinical trial design.


Rajiv Mahadevan, MBA

Managing Director

Key strategist with broad management expertise spanning operations, sales, business development and program management across the life sciences industry. Co-founded Applied Immunology that was acquired by Precision in 2016. Served as global health strategist for the Bill & Melinda Gates Foundation. Led business development efforts at 23andMe. Was centrally engaged in product development and commercialization for a multi-billion dollar novel therapeutic at Amgen.


Jan Lawler, CPA


Big Four accounting firm veteran with financial leadership expertise across the biotech, petrochemical, industrial construction, and economic development industries. Deeply engaged and widely recognized volunteer leader. Holds a Bachelor of Science degree in Accounting and is licensed as a Certified Public Accountant in Texas.

Sue Zhao

Sue Zhao, MS

Lab Manager

Industry veteran and award-winning designer of multi-color flow cytometry applications for drug development of preclinical and clinical studies, including numerous immunophenotyping and functional biomarker assays. Holds a master’s degree in Immunotoxicology/Pharmacology from the Department of Pharmaceutical Science at the University of Louisiana Monroe.

Geoff Copper

Geoffrey Copper

Project Manager

Clinical research authority with expertise spanning laboratory support, sample logistics, business development, and marketing. Primary project manager, interfacing with clients and internal and external operational teams. Holds a BS in Biochemistry and Cell Biology from Rice University.


Bill Soller, PhD

Director of Quality Assurance and Compliance (Consultant)

Industry-leading expert in product safety; drug, device and dietary supplement development and regulatory matters; clinical and technical sciences associated with FDA product approval/clearance; quality systems management; clinical and health outcomes research; and health policy. Manages regulatory programs and the development and assessment of quality management systems.