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Accordia Partners has been chosen as preferred developer of the 20-acre former Bayside Expo Center property in Dorchester.

University of Massachusetts officials announced their selection this morning. The winning team’s bid is based on plans for a 3.4-million-square-foot mixed-use development.

Accordia Partners will ground-lease the property for 99 years for $235 million, with $192 million guaranteed, UMass Trustees Chairman Robert Manning said. The team is a partnership between developers Kirk Sykes and Richard Galvin.

Galvin’s CV Properties built the Element and Aloft hotels across from the Boston Convention & Exhibition Center on D Street, which were recognized as a model of minority participation in development and hotel operations. Sykes is an architect, former chairman of the Federal Reserve Bank of Boston and managing director of New Boston Fund’s Urban Strategy America fund. The Accordia partnership also bid on the city of Boston’s Winthrop Square garage redevelopment, which went to Millennium Partners, and Massport’s A-2 office parcel, which went to Boston Global Investors.

The trustees last fall hired Newmark Knight Frank to market the 20-acre former Bayside Expo Center property. UMass bought the parcel from LNR Partners in 2010 for $18.7 million. The request for proposals indicated the site can support 2.5 million square feet of development.

UMass demolished the facility in 2015 and sought informal proposals from real estate developers in 2016. The initial round attracted responses from 16 developers including Beacon Capital Partners, American Campus Communities, Capstone Development Partners LLC, and Samuels & Assoc., according to the Dorchester Reporter.

The RFI cited the property’s proximity to downtown Boston, nearby transit at the MBTA’s JFK-UMass station and potential to partner with the university on a mixed-use development,

UMass has indicated it will use the proceeds from the sale to repair the science building garage.