David Oliver Sacks (born 25 May 1972) is an entrepreneur, author, and investor in internet technology firms. He is general partner of Craft Ventures, a venture capital fund he co-founded in late 2017. Previously, Sacks was the founding COO and product leader of PayPal (acquired by eBay in 2002 for $1.5 billion) and founder/CEO of Yammer (acquired by Microsoft in 2012 for $1.2 billion). In 2016, he led the turnaround of Zenefits as interim CEO. In 2017, Sacks co-founded Craft Ventures, an early-stage venture fund. His angel investments include Facebook, Uber, SpaceX, Palantir Technologies and Airbnb. He is a co-host of the podcast All In. Early life and education Sacks was born in Cape Town, South Africa, and immigrated to Tennessee, United States, with his family when he was five. Though Sacks did not know he wanted to be an entrepreneur, he did not want to work a profession like his father, who was an endocrinologist. He took inspiration from his grandfather, who started a candy factory in the 1920s. Sacks attended Memphis University School in Memphis, Tennessee. He earned his B.A. in economics from Stanford University in 1994 and received a J.D. from the University of Chicago Law School in 1998. Career PayPal In 1999, Sacks left his job as a management consultant for McKinsey & Company to join e-commerce service PayPal, which had been co-founded the year before by Max Levchin and Peter Thiel. As PayPal's COO and product leader, he built many of the company's key teams, and was responsible for product management and design, sales and marketing, business development, international, customer service, fraud operations, and human resources functions. During his tenure, PayPal grew payment volume from zero to $3.5 billion per year and revenue from zero to over $100 million in 2001. The company introduced business accounts, and expanded into multiple currencies and over 80 countries. PayPal had their initial public offering in February 2002. It was one of the first IPOs after the September 11 attacks. The stock rose more than 54% on the first day. In October 2002, eBay acquired PayPal for $1.5 billion. Sacks is a member of the so-called "PayPal Mafia", a group of founders and early employees of PayPal who went on to found a series of other successful technology companies. They are often credited with inspiring Web 2.0 and for the re-emergence of consumer-focused Internet companies after the dot com