John is a venture partner at Greylock. He is currently on the Board of Directors of Crew, Figma, Latent Space, Caffeine, Clockwise, Code for America, and Nuro. He led Greylock’s investment in Dropbox (Nasdaq:DBX), Ozlo (acquired by Facebook in 2017), Quip (acquired by Salesforce in 2016), Tumblr (acquired by Yahoo in 2013), Verst (acquired by Dropbox in 2017) and Instagram (acquired by Facebook in 2012). John previously served on the Boards of Directors of TripIt (acquired by Concur in 2011), CenterRun (acquired by Sun Microsystems in 2003), and Reactivity (acquired by Cisco Systems in 2007).
Prior to Greylock, John was CEO of Mozilla, the organization behind Firefox, the open source Web browser used by more than 450 million people. He also co-founded Reactivity, an enterprise security infrastructure company acquired by Cisco in 2007, where he served as founding CEO and later CTO. Earlier in his career, John held positions on the executive team at Trilogy Software and as a Senior Scientist in Apple’s research labs.
John holds a BS in Computer Systems Engineering and an MS in Computer Science with a focus on Human Computer Interaction, both from Stanford University. He is currently a Lecturer at Stanford’s Graduate School of Business and was previously a Consulting Assistant Professor at Stanford’s d.school, and an advisor to both the Stanford Technology Ventures Program and StartX, Stanford’s start up accelerator.
He is a co-inventor on seven United States patents.