Regina Cheng has 25 years of financial accounting experience and has managed our finance and accounting team since 2015. Prior to joining Sutro, while at Keynote Systems (acquired by Thoma Bravo, LLC), she built and led the finance team as the company’s first controller and assisted in its highly successful initial public offering and follow-on financing. Ms. Cheng has also held various corporate and divisional controllership management positions at several private and publicly held technology companies, such as CompareNetworks, Inc., TeraRecon (acquired by SymphonyAI Group), Sungard Data Systems (acquired by FIS) and Sterling Software (acquired by Computer Associates). Ms. Cheng received her B.A. from the University of California, Berkeley, and is a certified public accountant (inactive status) in California.

Greet Heremans is a seasoned clinical research professional with over 20 years of experience in clinical operations. She obtained her Masters in Pharmaceutical Sciences from the University of Antwerp in Belgium and in 2020 graduated from an Executive MBA program at the University of San Francisco. She started her career as a Clinical Research Associate at one of the largest CROs, IQVIA, and fell in love with the complexity of clinical research, the partnership with physicians & study coordinators and the collective mission to improve patients’ lives. Over the years she grew into roles with larger scope of accountability and developed a passion for building and leading teams, designing and delivering large portfolios of clinical trials. During her 14-years tenure at Roche/Genentech she proudly contributed to the first market approvals for pertuzumab in MBC and atezolizumab in UBC. She believes in the strength of the collective and enjoys engaging with diverse cultures having worked and lived in 4 different countries, Belgium, UK, Switzerland and US. Outside of work you can find Greet in a salsa lesson, a pilates class, on a hike, in a Toastmasters meeting or engaged in conversations with fellow industry colleagues on making clinical trials accessible to ALL patients. 

Dr. Heidi Hoffmann, VP Supply Chain, has 27+ years of experience in biotechnology, specializing in process development, technology transfer, manufacturing of vaccines and biological therapeutics.  After receiving her Ph.D. from the University of California, Berkeley, Heidi began her career at Aviron, where she worked on process development and production of vaccines for EBV, PIV and influenza (FluMist®). Heidi then joined Valentis, where she led the team responsible for process development, technology transfer and clinical production of plasmid DNA for gene therapy. In 2002, Heidi returned to vaccine work by joining VaxGen, Dr. Hoffmann was responsible for process development and manufacturing of anthrax vaccine. Later, Heidi transitioned into a technology transfer role, hiring and leading the VaxGen oversight team for the successful transfer of commercial production of Bristol-Meyer Squibb’s Orencia ® (abatacept) into the Celltrion manufacturing facility in South Korea. After completion, Heidi joined non-profit Global Solutions for Infectious Diseases (GSID) as Project Director responsible for coordinating the outsourcing of process development and manufacture of HIV vaccines. Dr. Hoffmann joined Sutro in February 2011, and currently leads Supply Chain as well as outsourced cGMP manufacturing for protein therapeutics and ADCs produced using Sutro’s proprietary cell-free protein expression system.

Diana Landa joins Sutro from Amgen where she recently held an Executive Director, Global Regulatory Affairs position. Ms. Landa provided leadership for the development and execution of global regulatory strategies for the biosimilar portfolio in the oncology and inflammation therapeutic areas. While at Amgen, Ms. Landa led numerous Health Authority interactions and marketing applications with FDA, EMA, PMDA, Health Canada and ROW. Prior to Amgen, Ms. Landa was with Teva Pharmaceuticals where she led the global regulatory filings for innovative programs in the hematology therapeutic area with leadership of cross-functional teams from IND to BLA stage.

Ms. Landa brings 20 years of Global Regulatory Affairs experience with new product development and marketed product life-cycle management with expertise in biologics and small molecules.  She brings extensive experience in leading global Health Authority interactions, negotiating strategies with respect to CMC and clinical development and a successful track record of marketing applications world-wide. 

Ms. Landa received her M.S. in Regulatory Affairs/ Quality Assurance from Temple University School of Pharmacy and her B.A.  in Chemistry and Biochemistry from LaSalle University.

Mr. Luhar has over 30 years of experience in biotech operations, including Manufacturing, Manufacturing Science and Technology, Engineering and Logistics. He joined Sutro in 2016 as Senior Director of Manufacturing and was promoted to Executive Director in 2018. At Sutro, Mr. Luhar has led the formation of Sutro’s manufacturing organization and GMP compliant operations and is responsible for Sutro’s cGMP manufacturing facility. Prior to joining Sutro, Mr. Luhar held senior leadership positions at Boehringer-Ingelheim, Novartis, Genzyme, and Baxter Bioscience where he worked for 18 years. Mr. Luhar received his B.A. in Biology from San Jose State University.

Steve Michel, M.B.A., VP Information Technology & Facilities Operations, joined Sutro as a consultant in 2009 and has 30 years of operations experience. Early in his career, he worked in digital photography at Sony Corporation, followed by managing life sciences IT for Arris Pharmaceuticals, AXYS Advanced Technologies and Discovery Partners International.

Previously, led the sales team at Apple, North America as their Retail Business Development Manager. Afterwards, joined Workwerks as their Transportation Commerce Software Developer and created IT consultancy Strategic Entrance, LLC.

While at Sutro, he leads IT and R&D facilities operations as well as construction management, EH&S, procurement and software development for scientific & business needs. Steve earned his M.B.A. from University of Illinois, B.F.A. from University of Southern California and maintains current PMP & PMI-ACP certifications.

Werner Rubas, Ph.D., brings to Sutro 30 years of biotech and pharmaceutical industry experience. Formerly, Dr. Rubas was at Nektar Therapeutics for over nine years, most recently as Executive Director in Non-Clinical Pharmacokinetics and Pharmacodynamics. At Nektar he provided leadership support, directed the generation of data packages for regulatory submissions of NKTR-214, NKTR-358, NKTR-262 and NKTR-255, filed a patent application for an immunotherapeutic tumor treatment method, and provided scientific input on cross-functional teams from research concepts to late stage development. Prior to Nektar, Dr. Werner was at Roche in Palo Alto, where he was the Associate Director of the Drug Metabolism and Pharmacokinetics group. Additionally, he has been a SPARK advisor at Stanford University since 2010 and lectures classes on Drug Development at UC Berkeley Extension. Dr. Rubas earned his Ph.D. from ETH, Zurich and received his pharmacy license from the School of Pharmacy at ETH, Zurich.

Dr. Gang Yin is an accomplished scientist and experienced R&D team leader with over 18 years of expertise in research and drug development. After earning his Ph.D. from Tsinghua University, he started working on the development and application of Cell-free protein synthesis in the lab of Prof. Jim Swartz at Stanford University. In 2004, Dr. Yin joined Sutro Biopharma where he has held various positions and is currently leading the Platform Engineering and Process Research Department.

With a proven track record of success as a project leader on multiple programs, Dr. Yin has contributed to the progression of several programs into clinical trials. Notably, the collaboration with Merck led to the discovery of MK-1484. Dr. Yin is an expert in ADC and cytokine biologics development strategies, with a particular emphasis on strain engineering, antibody discovery, expression, purification, conjugation, and drug lead characterization. He is the pioneer of site-specific ADC development through non-natural amino acid incorporation.

Dr. Yin’s strategic and scientific leadership skills, coupled with his expertise in protein biochemistry, have significantly contributed to the success of the company. He has authored 30+ publications and holds 10+ patents.