General Partner at Runa Capital ($0.5B+ AUM), who focuses on early-stage OSS investments. Previously co‑founded an endowment which grew from $50K to $600K+ in 12 months. Publishes the ROSS Index, a quarterly data-driven rating of top open source startups.

Head of Open Source at application monitoring platform Sentry (used by 4M+ developers) and the leader of the Open Source Pledge, a cultural initiative to get companies to pay open source maintainers. Founded OSS funding pioneer Gratipay (2012–2018).

Co-founder and ex VP Engineering at Nginx, the world's leading web server, used by 400M+ websites, acquired for ~$0.7B in 2019. Former VP Engineering at F5. Seasoned supporter of FreeBSD.

Program Manager at NumFOCUS, a nonprofit foundation supporting scientific OSS such as Pandas. Co-Founder of SciOS and the The Institute of Open Science Practices, focusing on sustainable open science.

Chief Fundraising Officer at the OpenSSL Foundation and former Director of the Wikipedia Endowment. Served as Director of Individual Giving at the Smithsonian and the New York Public Library

Maintainer of the Open Source Pledge. Core developer of OSS funding service thanks.dev. Helped build software used by the Gates Foundation to allocate $1B in healthcare funding.