He was born on November 18, 1982 in San Francisco, the son of a U.S. Postal Service mail carrier and a public school teacher, in an Irish-American Catholic family, and he grew up in Watsonville on the Central Coast. In 2001 he graduated from Bellarmine College Preparatory, a Jesuit high school in San José, on a 200-hour work-study scholarship, which meant he commuted daily over Highway 17 to get there.
In 2005 he graduated magna cum laude from Harvard College with a B.A. in Social Studies, where he had been president of the Harvard Undergraduate Council, and a Michael C. Rockefeller fellowship took him to Bolivia in 2005 and 2006 to work on irrigation and development projects with campesinos, after which, from 2006 to 2008, he taught seventh and eighth grade English and history in San José as a Teach for America corps member.
In 2008 he joined Sean Parker and Joe Green's startup that became Causes, a civic app on Facebook, and he became its CEO in 2013, and in 2014 he co-founded Brigade Media, another civic-tech company built for political mobilization, but in 2019 Brigade did not reach commercial viability, so Pinterest did an acqui-hire of the engineering team and the IP was sold to Countable.
In March 2020 he was elected to the San José City Council for District 10 with 58%, and in November 2022 he won the runoff for Mayor of San José against Cindy Chavez, the Santa Clara County Supervisor, 51.3% to 48.7%, taking office on January 1, 2023 and then winning reelection in the March 2024 election with 86.6%. He announced his run for governor on January 29, 2026, which made him the last entry into the Democratic field.
