photograph of Firefly members sitting around a table talking


The Firefly Team

Change in healthcare demands vision and persistence. Our leadership infuses the Firefly culture with a balance of focused intensity, genuine caring, and earned wisdom.

Our leadership

Portrait of Nisha Basu
Nisha Basu MD, MPH
Chief Clinical Officer, She/Her/Hers
Portrait of Matt Cook
Matt Cook
Chief Commercial Officer, He/Him/His
Portrait of Andy Ellner
Andy Ellner MD, MSc
Chief Clinical Advisor, He/Him/His
Portrait of Jeff Greenberg
Jeff Greenberg MD, MBA
Chief Network Officer, He/Him/His
Portrait of Liz Kellogg
Liz Kellogg
Chief Marketing Officer, She/Her/Hers
Kara Rios
Kara Rios
Chief Financial Officer, She/Her/Hers
Portrait of Matt Libby
Matt Libby DO, FAAFP
Medical Director, He/Him/His
Portrait of Brian Lynch
Brian Lynch JD
General Counsel, He/Him/His


At Firefly, we have a grand ambition to make care more equitable, affordable, and human. It’s a rare opportunity to make a lasting difference. Join us.

Our board of directors

Portrait of Jonathan Bush
Jonathan Bush
Board of Directors, Founder & Chief Executive officer, Zus Health
Portrait of Nancy Brown
Nancy Brown
Board of Directors, General Partner, OAK HC/FT
Portrait of Carl Byers
Carl Byers
Board of Directors, Partner, F-Prime Capital Partners & Adjunct Lecturer, Harvard University
Portrait of Seth Cohen
Seth Cohen
Board of Directors, Co-founder & CEO, Ooda Health
Portrait of Andy Ellner
Andy Ellner MD, MSc
Chief Clinical Advisor, He/Him/His
Portrait of Fay Rotenberg
Fay Rotenberg
Chief Executive Officer, She/Her/Hers
Portrait of Julie Yoo
Julie Yoo
Board of Directors, General Partner, Andressen Horowitz

Our advisory council

Portrait of Brian Marcotte
Brian Marcotte Advisory Council Chairman
Advisory Council, Former President & CEO, Business Group on Health
Portrait of Karyn Polito
Karyn Polito
Advisory Council, Former Lt. Governor of Massachusetts
Portrait of Manny Menendez
Manny Menendez
Advisory Council, Principal, MJ Advisor Group
Portrait of Erik Sossa
Erik Sossa
Advisory Council, Former VP of Global Benefits & Wellness, Pepsico
Portrait of Matt Manders
Matt Manders
Advisory Council, Former President of Strategy, Solutions, & U.S. Markets, Cigna Corporation
Portrait of Ron Fontanetta
Ron Fontanetta MBA, MPH
Advisory Council, Former North America and Benefits Practice Leader of Strategic Growth, Willis Towers Watson
From our team
“The experience of getting primary care is reorienting around the needs of individuals. Imagine getting primary care from a platform built with your needs in mind, that achieves better health outcomes, and reduces the long-term cost of your care. That’s the advanced virtual care model.”
Andy Ellner, MD, MSc
Chief Clinical Advisor, Firefly Health
Andy Ellner pointing at a wall of sticky notes

Join our team

We’re always on the lookout for big hearts and sharp, creative minds to help us deliver an unforgettable experience to our members.