David Oliver Sacks is a South African-American tech entrepreneur, venture capitalist, investor, author, and podcaster. He is renowned as a key member of the PayPal Mafia, having served as COO and product leader at PayPal, helping drive its growth until its acquisition by eBay in 2002. Born in Cape Town, South Africa, on May 25, 1972, he moved to the United States as a child and settled in Tennessee. He earned a BA in Economics from Stanford University in 1993 and worked as a management consultant at McKinsey & Company before joining PayPal in 1999. Post-PayPal, he founded Gluecode Software (acquired by Software AG) and co-founded Yammer, a business social networking platform acquired by Microsoft for $1.2 billion in 2012. He authored 'The Rise of the Blogosphere' in 2005. In 2016, he served as interim CEO of Zenefits, stabilizing the company amid regulatory challenges, though he faced scrutiny over compliance issues during this tenure with no major legal convictions. In 2017, he co-founded Craft Ventures, a venture capital firm focused on early-stage investments, where he serves as CEO and general partner. His investment portfolio includes Facebook, Uber, SpaceX, Palantir Technologies, and Airbnb. He co-hosts the All-In Podcast, launched in 2020, with Chamath Palihapitiya, Jason Calacanis, and David Friedberg. A close friend of Peter Thiel, Sacks holds libertarian-leaning views and has been vocal on free speech and cryptocurrency. In December 2024, President-elect Donald Trump appointed him as White House AI and Crypto Czar for the incoming administration, marking a shift into public policy.