John O’Brien is a Managing Director at RockCreek. He was previously a Senior Portfolio Manager at AllianceBernstein in London, where he managed portfolio construction and risk management for the firm’s $60 billion Global Growth Equities strategies. Before AllianceBernstein, John was CEO of American Express Asset Management International in London, an institutional asset manager with over $30 billion under management and nine investment and research offices around the world. At American Express, john also served as a senior leader of the firm’s Financial Institution’s Group and a Director on the Board of the American Express global mutual fund family, as well as a Trustee of the company’s

John O'Brien
Managing Director
RockCreek
United States, New York, New York
About Me
Profile Information
Managing Director
RockCreek
Investment Team,Operations Team
Investor
Fund of Funds
New York
New York
United States
Oct 31, 2025
More profiles to browse
Theresa Nardone
Vice President
SK
Sudhir Krishnamurthi
Senior Managing Director
Kevin Kelly
Director
HD
Huaizhang Deng
Managing Director
You Might Like
RM
Robert Miller
Chief Compliance Officer
Oakmont Corporation
PM
Prtima MISHRA1
Software Engineer
PA TEST
ML
Mary Limburg
Trader & Client Service Specialist
Pennsylvania Capital Management
PG
Patricia Gee
Operations
Manhattan Family Office