
Additional Ventures’ mission is to cure single ventricle heart disease through transformative research and strategic investments that revolutionize treatment and care.
We spur catalytic collaboration within the single ventricle community, facilitate faster and better science through agile approaches to research funding, and ensure researchers have the resources needed to drive toward a cure.
Meet the Team

Erin Hoffmann
Executive Chairman & Founder

Mike Schroepfer
Founder

Kirstie Keller, PhD
CEO

Dylan Barbera, PhD
Program Officer

Kaitlin Davis, PhD
Senior Program Manager

Ashley Ford
Executive Assistant

Megan N. Freeland, PharmD
Director of Communications

Taylor MacLean
Program Manager

Tiana Medley, PhD, PMP
Program Officer

Diane Pickles
Program Director

Courtney Steger, PhD
Program Manager
Scientific Advisory Board

Deepak Srivastava, MD
President, Gladstone Institutes
Professor, University of California, San Francisco

Daniel Licht, MD
Professor of Neurology
Children’s National Hospital

R. Mark Payne, MD
Professor of Pediatrics
Professor of Medical & Molecular Genetics
Indiana University School of Medicine

Cecelia Lo, PhD, FAHA
Distinguished Professor and F. Sargent Cheever Chair in Developmental Biology
University of Pittsburg

Anthony Philippakis, MD, PhD
Chief Data Officer, Institute Scientist
Broad Institute of MIT and Harvard

Alison Marsden, PhD
Professor of Pediatrics – Cardiology and Bioengineering
Stanford University

Anthony B. Firulli, PhD
Endowed Professor of Pediatrics
Indiana University School of Medicine

Shelley Miyamoto, MD
Jack Cooper Millisor Chair in Pediatric Heart Disease
Professor of Pediatrics
Director, Cardiomyopathy Program
University of Colorado and Children’s Hospital Colorado

Rahul Rathod, MD, MBA
Associate Cardiologist-in-Chief at Boston Children’s Hospital
Associate Professor at Harvard Medical School
Director of the Single Ventricle Program and the Fontan Clinic at Boston Clinic at Boston Children’s Hospital

Mark Skylar Scott, PhD
Assistant Professor of Bioengineering
Stanford University
Patient and Family Advisory Board

Tawanna Williams, CPC
Mother to a Post-Heart Transplant Single Ventricle Daughter
Patient Advocacy and Health Equity Manager, Exact Sciences
Podcast Creator/Host, Broken Open

Bulent Arman Aksoy, PhD
Father to a Single Ventricle Daughter
Computational Biologist

Taylor Houlihan, MD
Pediatric Resident
Single Ventricle Fontan Patient

Jameson Rich
Post-Fontan Single Ventricle, Bi-Ventricular Repair
Writer and Filmmaker
Reports
Additional Ventures is comprised of multiple entities that make grants and/or investments in service of our mission, including Additional Ventures Foundation, a nonprofit 501(c)(3), Additional Ventures LLC, and a donor advised fund of the Silicon Valley Community Foundation. Additional Ventures’ activities do not represent the views or priorities of any other organizations its founders may be connected to.