Executive Leadership

Bruce Culleton, MD

Dr. Culleton joins ProKidney from CVS Kidney Care, a wholly owned subsidiary of CVS Health, where he was most recently Vice President and General Manager. Previously, he served as Vice President and Chief Medical Officer at CVS Kidney Care. Before joining CVS Health, he was Vice President, Global Clinical Development and World Wide Vice President, … Read more

James Coulston, CPA

Mr. Coulston has served as ProKidney’s Chief Financial Officer since January 2022. Prior to that, Mr. Coulston served as ProKidney’s Senior Vice President, Finance from January 2021 to December 2021 and ProKidney’s Vice President, Finance from February 2019 to December 2020. Before joining ProKidney, from August 2015 to January 2019, Mr. Coulston served as the … Read more

Todd C. Girolamo, JD, MBA

Mr. Girolamo joined ProKidney as Chief Legal Officer in March 2022. Prior to that, he spent 11 years at Caladrius Biosciences, Inc. (Nasdaq: CLBS), where he served as Chief Legal Officer, Senior Vice President of Corporate Development and Corporate Secretary. He began his legal career at Cahill Gordon & Reindel in 1990 and later at … Read more

Nikhil Pereira-Kamath

Mr. Pereira-Kamath joined ProKidney in 2023 as Vice President of Business Development & Innovative Solutions, bringing with him over a decade of experience as a seasoned entrepreneur in addition to a strong foundation in finance. Prior to joining ProKidney, he was Chief Executive Officer and subsequently Executive Chairman, a role he continues to hold, of … Read more

Darin J. Weber, PhD

Dr. Weber joined ProKidney as Senior Vice President of Regulatory Development in September 2020, and was promoted to Chief Regulatory Officer, SVP and Head of Global Regulatory Affairs, Quality Management, Biometrics and Market Access. He is responsible for leading the development and implementation of ProKidney’s regulatory strategy in all markets, worldwide, interfacing with regulatory authorities … Read more

Mary Weger

Ms. Weger has an extensive and accomplished background in human resources, especially for emerging early-stage companies as well as established innovative biopharmaceutical companies. Prior to working with emerging biopharmaceutical companies, Ms. Weger spent more than ten years at Celgene Corporation as Celgene’s first Chief Human Resource Officer (CHRO) joining early in the company’s maturation with … Read more

Emily Butler, PhD

Dr. Butler joined ProKidney in April 2021 as Director, Biostatistics. She was promoted to Vice President, Biometrics in 2022 and built the Biostatistics, Data Management, Statistical Programming and Data Science functions. She is responsible for owning, managing, analyzing and reporting data across the portfolio and has served as Senior Vice President, Biometrics since 2023. Prior … Read more

Joseph Stavas, MD, MPH

Dr. Stavas has served as ProKidney’s Senior Vice President of Clinical Development and Interventional Procedures since December 2022. He joined ProKidney as Senior Vice President of Clinical Development in October 2019 and led the strategic advancement of clinical trials and scientific discovery and development. He brings over 30 years of experience in medical practice, academics … Read more

Lucio Tozzi

Mr. Tozzi joined ProKidney in January 2024 as Senior Vice President of Global Clinical Operations providing clinical operational leadership to drive the execution of ProKidney’s global clinical trial portfolio. From 2019 – 2023 he was Senior Vice President of Clinical Operations at Rain Oncology Inc., and from 2014 – 2019 he was Vice President, Head … Read more

Richard Williams

Mr. Williams joined ProKidney in 2023 as SVP, Information Technology bringing over 30 years’ experience in the biopharmaceutical, health and consumer industries.  Most recently, Mr. Williams was SVP and Chief Information Officer for Celgene Corporation.  Mr. Williams joined Celgene as its first Chief Information Officer and led the company’s global information technology organization including the … Read more