We are a highly multidisciplinary team of biologists, data scientists, engineers and MBAs, passionate about transforming and accelerating infectious disease diagnostics  – from days down to minutes.
We are PhAST.

Kwangmin Son, PhD

Co-founder and Chief Executive Officer

Kwangmin trained as an engineer working at the interface of mechanical and biological engineering at MIT, where he earned his PhD before becoming an entrepreneur. Kwangmin brings strong expertise in combining microbial imaging and microfluidics, and he has been leading PhAST’s business, financing and corporate development strategies. He aspires to contribute to fight the spread of antibiotic resistance through PhAST’s AI diagnostic technology.

Roman Stocker, PhD, Prof. ETH

Co-founder and Chief Scientific Officer

Roman pioneered single-cell imaging approaches to study microorganisms. A professor of engineering at ETH Zurich, formerly on the faculty at MIT, Roman published over 110 papers, including more than 25 in Nature, Science and PNAS, on computer vision applied to bacteria, the quantification of microbial phenotypes from single-cell imaging, and innovative microfluidic technology for microbiology. His work has been recognized by numerous major awards, including an NSF CAREER award and an Investigator award from the Gordon and Betty Moore Foundation. Roman’s vision is that creative diagnostic technology will be a major asset in our fight against antibiotic resistance, in developed and developing countries alike.


Vicente Fernandez, PhD

Director of Data Science

Stefania Vitillo, PhD

Data Scientist

Pietro Marino, PhD

Data Scientist

Sandro Giacomuzzi, MS

Data Scientist


John (JT) Sauls, PhD

Head of Bioengineering

Jay Kim

Research Associate


Susan Weir, PhD

Senior Clinical Microbiologist

Matthew Sahm

Research Associate

Randy Vinas

Research Associate


William Shubert

Lead Software Engineer

Aakash Shah

Software Engineering Intern

Man Nguyen

Software Engineering Intern

Operations & International

Wilson Keng, MBA

Head of Business Operations

Yongkyu Kim, MS

Head of Asia Operations

Hayoon Cheon

Clinical Affairs Intern, Korea


Sanjat Kanjilal, MD, MPH

Clinical Advisor

Dr. Kanjilal is the Associate Medical Director of Clinical Microbiology and an infectious diseases physician at Brigham & Women’s Hospital, and a Lecturer in the Department of Population Medicine at the Harvard Pilgrim Health Care Institute. Dr. Kanjilal’s expertise centers on improving diagnostics for bacterial infection, understanding the emergence and spread of antibiotic resistance, and developing antimicrobial stewardship interventions to prevent antibiotic resistance infections.

Robin Patel, MD, PhD

Scientific Advisor

Dr. Patel is the Director of the Infectious Diseases Research Laboratory and the Chair of the Division of Clinical Microbiology at the Mayo Clinic. She is also the President of the American Society for Microbiology. Dr. Patel’s focus areas include diagnostic assays in clinical bacteriology, biofilm-mediated infections, novel antimicrobial agents for therapy of bacterial infections and the clinical detection and identification of bacteria and their antimicrobial resistance and susceptibility.

Collaborating Institutions