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Mayor-elect Martin J. Walsh’s transition team will include a campaign adviser and two former rivals whose endorsements helped propel him to victory, sources with knowledge of the transition told the Globe.

The sources, who spoke on condition of anonymity because they were not authorized to publicly discuss the appointments, identified four of the five co-chairs of the transition team. Walsh is expected to announce the appointments Friday.

The transition team leaders include former mayoral candidates John F. Barros and Charlotte Golar Richie, as well as public relations executive Joyce Linehan and Katherine P. Craven, executive director of the University of Massachusetts Building Authority.

None of the four could be reached for comment Thursday night. It was not clear who Walsh will name as the fifth co-chair.

Golar Richie and Barros ran in the primary election, failing to make it into Tuesday’s final vote. But their endorsements in the final round helped Walsh gain traction in communities of color.

Walsh and his general election opponent, Councilor John R. Connolly, worked feverishly to win support in those communities, where neither did especially well in the preliminary election.

Barros, a former School Committee member, is Cape Verdean, and Golar Richie, the city’s former housing chief, is African-American.

Linehan, a veteran public relations strategist who runs a firm in Dorchester, served as a communications adviser to the Walsh campaign.

Craven joined the UMass Building Authority in 2011 and worked previously as first deputy state treasurer and head of the Massachusetts School Building Authority, the university said in a statement at the time of her appointment.