Mark Goldstein is an angel investor, fundraiser and entrepreneur. He is the founder of Bad Ass Advisors, a matchmaking service for startups and advisors, and also started 12 companies, including back office solutions provider BackOps. Goldstein is best-known for being the private investment manager of Marc Benioff, the billionaire CEO, chairman and founder of Salesforce and owner of Time magazine. With his wife Kristen Koh Goldstein, he operates Marc Benioff's private investment vehicle Efficient Capacity, which invests in two to three early-stage startups a month. He is also an angel investor and participated in a funding round of Diamond Foundry, the first carbon-neutral producer of lab-grown diamonds.