Meet the Team
Meet the team that turns the impossible into possible
Joe Kiani
Chief Executive Officer
Joe Kiani is committed to transforming yesterday's impossibilities into today’s realities. This is precisely what he accomplished at Masimo® and continues to achieve with Willow Laboratories, which was founded in 1998. Joe Kiani founded Masimo in 1989, a global medical technology company renowned for noninvasive patient monitoring technologies. Under his leadership as Chairman and CEO, Masimo transformed from a “garage start-up” into a publicly traded, multi-billion-dollar enterprise listed on NASDAQ (MASI). To name just one successful invention, Masimo Signal Extraction Technology® (SET) is the primary pulse oximetry that can be found at the top 10 hospitals in the United States and throughout the world. Today, he is leading Willow Laboratories as the team prepares for the commercialization of several new groundbreaking technologies.
Gerry Hammarth
Chief Financial Officer
Gerry Hammarth joined the company in 2013 as Chief Financial Officer. Bringing over 30 years of experience from various high growth industries, he is responsible for all financial and administrative operations of the company. Prior to joining, he served as Senior Vice President, Finance for Masimo Corporation, a publicly traded medical device manufacturer. Prior to his time at Masimo, he held finance positions in a variety of industries, including telecommunications hardware, personal computers, and direct marketing. Hammarth holds an M.B.A. in Finance from the Wharton School of the University of Pennsylvania and a B.A. in Psychology from Stony Brook University.
Hung Vo
Chief Operating Officer
Hung Vo has over 20 years of experience in the research and development of sensors. After joining the company in 2007, he played a crucial role in the advancement of sensor technology towards the limits of detection medical devices. Since 2020, he has led the hardware team with his versatile expertise in complex optical, mechanical, and electrical systems. As the Chief Operating Officer, he is responsible for guiding the team from project conception through completion. He holds a Ph.D. in Chemical Engineering from the University of California, Irvine.
Greg Olsen
Vice President Product Design
Bringing over 24 years of experience, Greg Olsen is known for his ability to create synergy between physical industrial design and digital UX/UI experiences of products and services by taking an empathic based approach to reduce the burden for those involved in the product’s use. He joined Willow in 2010 and prior to that worked on a range of products such as consumer electronics, surgical equipment, and non-invasive sensors. He is a co-inventor on 30 patents and his contributions have been recognized by winning an iF product design award and three medical device excellence awards. Olsen holds a B.S. in Industrial Design from California State University, Long Beach.
Angela Martin
Vice President Marketing
In 2023, Angela Martin joined the team as Vice President of Marketing. With over 25 years of engineering and marketing experience, Martin has introduced numerous, successful new products into diverse markets including medical device, diagnostics, healthcare, and consumer packaged goods. Prior to joining Willow, she spent time leading marketing teams in the medical device industry and was the Vice President of Marketing for Mayo Clinic Laboratories. Before entering healthcare related industries, Martin spent 10 years in the consumer packaged goods industry, launching new products and leading marketing at PepsiCo, Sara Lee, and Kimberly-Clark. Prior to her marketing career, Martin worked as an engineer at Harley-Davidson and her name can be found on the 100th anniversary motorcycle in the Harley-Davidson museum. She holds an M.B.A. in Marketing from the University of Chicago Booth School of Business and a B.S. in Industrial and Manufacturing Engineering from Marquette University.
Dr. Diane Perez
Vice President of Business Development
Diane Perez joined Willow Laboratories in November 2024 as Vice President of Business Development, bringing over 25 years of experience in medical communication, strategic clinical collaboration, and business expansion. A licensed medical doctor, Diane has been a prominent health communicator in international media, educating audiences on health and wellness through trusted, accessible content. She has hosted medical TV shows and participates in several media outlets, providing expert advice on healthy living. Dr. Perez has been a major contributor to advancing health initiatives and legislative changes for critical newborn health screenings in Mexico. As an accomplished author, she has published two books in Spanish titled Take Care of Your Health and In Shape and Without Overweight. Diane earned her medical degree from the National Autonomous University of Mexico (UNAM) and a Master of Healthcare Management from the Harvard School of Public Health.
Clinical Advisory Board
Meet the Team That Leads the Medical Decisions
Mary C. Wright
MSN, RN, CPNP, CDCES
Jeanne Buchanan
MSN, RN, BC-ADM, CDCES
Sabrina Stutz
PhD
Bill Rainusso
T1D Dad
Marinna Basina
MD
Melissa E. Weinberg
MD
Tariq Ahmad
MD
Rashanak Monzavi
MD