Sean O’Shea is Managing Principal of Sienna Capital Partners with expertise in strategic advisory, capital markets, and direct and indirect real estate investing.

Prior to founding Sienna in 2011, Sean was a Fund Manager within the Global Real Estate Multi‐Manager Group of Aviva Investors with then over $8.7 billion in AUM. He joined Aviva Investors in 2008 as part of its U.S. acquisition of Madison Harbor Capital. Sean was a senior member of Aviva’s Americas investment team based in New York. He was later seconded to London where he served on Aviva’s European investment team.

During his tenure at Aviva and Madison Harbor, Sean managed four co-mingled real estate funds of funds that invested in value-add and opportunistic strategies in developed and emerging markets.  His responsibilities included portfolio management, investment selection, and asset management. He reviewed over 1,700 fund strategies and interviewed over 300 management teams. His investment activity focused on co-mingled funds, secondary interests, and distressed recapitalizations of funds and portfolios.  Prior to joining Madison Harbor in 2006, Sean was a member of the acquisition team of Gould Investors L.P. where he invested in retail, office and multifamily properties.

Sean received his BA from Rutgers University, MBA from Georgia State University and MS in Real Estate from New York University.  He has been a member of the Urban Land Institute, the International Council of Shopping Centers, the Pension Real Estate Association and the Family Office Association.  Sean is an active alumnus of New York University, where he has been a guest lecturer, an Alumni Chapter Board member of the NYU SPS Schack Institute of Real Estate and currently serves as an Alumni Board member of NYU’s School of Professional Studies.