Our Leadership

Aaron Leibtag

Cofounder | Chief Executive Officer

Aaron has fostered successful partnerships with, and secured funding from, many of the largest global pharmaceutical companies and leading hospitals to develop DARWEN™ AI, which has achieved industry leading accuracy published in prestigious journals and presented at influential global conferences. Aaron has a proven leadership track record leading organizational transformation resulting in liquidity transactions for multiple private equity backed consumer enterprises. Aaron is the former vice chair of the Sinai Health System Volunteer Advisory Committee, and board member at the Museum of Modern Contemporary Art.

Steven Aviv

Cofounder | Chief Technology Officer

Steven led the design and development of Pentavere’s breakthrough AI engine, DARWEN™ AI, which has been proven and validated. Steven has more than 20 years of experience in the design and implementation of portfolio risk management systems for the largest financial service institutions in the world. Steven is a system and data architect who enjoys using technology to solve big problems.

Dr. Christopher Pettengell

Chief Medical Officer

Chris is an Oxford-educated surgeon with over ten years of clinical experience treating patients and implementing systems to improve clinical efficiency. After completing his MD at Oxford University Chris first visited Canada as a Rhodes Scholar to study HIV resistant patients, before training as a surgeon. Chris moved his family to Canada to be Pentavere’s Chief Medical Officer.

Robin Gould-Soil


Chief Privacy Officer

Robin has over 20 years of healthcare and privacy experience. Robin is a globally recognized leader in privacy legislation, risk management and data management strategy. Robin is the former Chief Privacy Officer at University Health Network (UHN) a top 10 global health network, and the TD Bank.

Dr. Erin Stewart

Director of Clinical Operations and Head Scientist

Dr. Erin Stewart has a PhD in Medical Biophysics from the University of Toronto and over a decade of research experience managing multiple local, national, and international research initiatives at Princess Margaret Cancer Centre. After her PhD, Erin was asked to help start and manage the Lung CALIBER research program with a mandate to rethink current early detection of Lung Cancer screening strategies through liquid biopsies, integrated with Breathomics and Radiomics. 

Aaron (Wenkai) Li

Head of Artificial Intelligence

Aaron W. Li is a machine learning specialist and software engineer with research projects published at the top computer science conferences. Aaron has extensive experience in Natural Language Processing, Computer Vision, Data Analysis, and Machine Learning as well as various software programming languages and methods of statistical analysis.

Aviva Pratzer

Head of Growth and Business Development

Aviva has extensive experience driving strategic and operational initiatives to accelerate organizational growth and build long lasting relationships with clients. Prior to Pentavere, Aviva implemented business transformation and partnership initiatives at large global media and technology organizations. Aviva has an MBA from the Rotman School of Management at University of Toronto and a B.A from Barnard College of Columbia University.