Our Staff
AVAC staff members work with partners around the world to push for the funding, focus, implementation and research that’s needed to accelerate the ethical development and global delivery of new HIV prevention options as part of a comprehensive response to the pandemic. Meet our staff below!
Our Board
AVAC is led by a diverse and influential Board of Directors who share a deep commitment to HIV prevention and global health equity. Together they draw from decades of experience in research, advocacy and leadership in global health, HIV and grassroots community activism. Meet the AVAC Board!
Access Bridge
Introducing our new partner organization, Access Bridge! Founded in 2025, Access Bridge is an independent, not-for-profit with a global footprint, extensive expertise in product introduction, and strong roots in advancing African leadership. Incubated at AVAC over the course of 10 years, AVAC’s Product Introduction & Access team is now the team at Access Bridge, bringing unparalleled experience in accelerating introduction and scale-up of new prevention products. Find them at healthaccessbridge.org.
AVAC Staff

Estelle Ngaba
Finance Manager

Jessica Salzwedel
Senior Program Manager: Cure Research

Kate Segal
Senior Program Manager: Product Introduction & Access

Nandisile (Luthuli) Sikwana
Regional Stakeholder Engagement Manager

Abigail Smith
Chief Financial Officer

Roberta Sutton
Senior Program Manager & Team Lead: Data, Analytics, and Impact

Grace Tetteh
Program Manager: Data, Analytics & Impact

Mitchell Warren
Executive Director
















