Leo was a staff writer and editor of opposition newspapers in the Philippines during the Marcos administration, when press freedom was under fire. He has also been a Red Cross volunteer, an evangelist, a student leader, a union organizer, an organizer of farming cooperatives, an activist for mountain tribes, an environmentalist, and a corporate lobbyist. Leo has been working in technology since 1995. He moved to the Valley in 2000, where he currently lives with his wife and children.
- Wikia Project: Silicon Valley Commons
- Other projects: Craigslist Foundation, Idealist.org, NetSquared, NewsTrust
- Past web projects: Customer Service in Squidoo Customer Service Reader