Senior Team

Tim Bertram, PhD

Dr. Bertram has served as Chief Executive Officer of ProKidney since January 2019. Since February 2017, Dr. Bertram has served on the board of directors of NexImmune, Inc. (Nasdaq: NEXI), a clinical-stage biotechnology company developing a novel approach to immunotherapy designed to orchestrate a targeted immune response by directing the function of antigen-specific T cells. … 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

Deepak Jain, PhD

Dr. Jain has served as ProKidney’s Chief Operating Officer since March 2016. Dr. Jain brings over 36 years of experience in the development of tissue-engineered and cell therapy products. Previously, Dr. Jain held management roles of increasing responsibility at Johnson & Johnson (NYSE: JNJ) and Merck (NYSE: MRK) and was involved in the development of … Read more

Libbie P. McKenzie, MD

Dr. McKenzie has served as ProKidney’s Chief Medical Officer since April 2022. Prior to that, she held roles of increasing responsibility at IQVIA / Quintiles since June 2007. Most recently, Dr. McKenzie served as Vice President, Medical, Global Head of Lifecycle Safety Project Leadership and Strategic Solutions from November 2019 to March 2022, and as … Read more

Ashley H. Johns, MSHS

Ms. Johns has served as ProKidney’s Senior Vice President of Clinical Operations since January 2022. Prior to that, Ms. Johns served as Vice President of Clinical Operations from March 2019 to January 2022, where she managed multiple cell therapy programs for ProKidney. She has extensive knowledge in the neurological and regenerative medicine therapeutic areas, having … Read more

Timothy Lutz

Tim has over 30 years of experience in the biological and pharmaceutical manufacturing industry with over 25 years working in the biologics arena in both commercial and clinical operations. Additionally, Tim has more than 20 years in contract manufacturing. His primary focus has been in aseptic parenteral manufacturing. Tim is the Senior Vice President, Manufacturing … Read more

Joseph Stavas, MD, MPH

Dr. Stavas has served as ProKidney’s Senior Vice President of Clinical Development since October 2019 and leads the strategic advancement of clinical trials and scientific discovery and development. He brings over 30 years of experience in medical practice, academics and research endeavors and has been affiliated with ProKidney since 2012. He also serves as liaison … Read more

Darin J. Weber, PhD

Dr. Weber has served as ProKidney’s Senior Vice President of Regulatory Development since September 2020 where he is responsible for leading the development and implementation of ProKidney’s regulatory strategy in all markets, worldwide, and interfacing with regulatory authorities. Dr. Weber has over 25 years of experience in cellular and tissue-based regenerative medicine products, with previous … Read more