David Geffen is President of Geffen Advisors, a consultancy that provides strategic advice and solutions to established hedge funds in areas including prime brokerage, financing, counterparty and liquidity risk management, and trading documentation negotiation. Geffen Advisors also provides new hedge fund managers advice on foundational aspects of their launches typically including their selection and contract negotiations with prime brokers, administrators and audit firms. Additionally, the firm offers training on hedge fund topics to hedge fund financing and operations professionals. Geffen Advisors is headquartered in San Francisco, California, USA. David was previously Managing Director at BlackRock and Barclays Global Investors where he established and managed the hedge fund treasury function. David is an alumnus of Goldman Sachs, Citibank and Amaranth, and he has been working with hedge funds from the sell-side and buy-side in various capacities for more than 20 years. David earned a BA degree from Brown University and an MBA from Columbia University.