The Service Employees International Union (SEIU) announced its new secretary-treasurer Wednesday.

Eliseo Medina was elected by the union's executive board to serve the remainder of Anna Burger's term, until 2012.

Earlier this year, Burger resigned her seat as secretary-treasurer after she saw her effort to take the top spot at SEIU fall short. Mary Kay Henry is now president of the politically powerful union — thanks partly to the support of Medina — after she campaigned for the seat when Andy Stern, president for 14 years, retired.

Medina was the leader to unite several unions, including the AFL-CIO, behind a framework for a comprehensive immigration reform bill. SEIU has been one of the most active unions in support of a new reform bill.

Medina will be the first Latino to serve in the secretary-treasurer position for the union.