Former Bronx Borough President Adolfo Carrion, who has spent the past three years working for the Obama administration, is taking a job in the private sector with CSA Group, which bills itself as the “largest architectural, engineering, environmental services, consulting, and construction and program management company in the United States.”

Carrion, who left the borough president’s office in 2009 to become the federal government’s urban affairs czar and then moved on to take over as the regional director of U.S. Department of Housing and Urban Development (HUD), will be CSA’s senior advisor for corporate development, according to a press release sent out this morning.

“We at CSA Group are very excited and honored that Adolfo has agreed to join our firm”, stated JJ Suarez, Chairman and CEO, CSA Group. “Adolfo’s proven track record in empowering urban communities throughout the United States, coupled with his economic development experience, will be of vital importance as we continue to position CSA Group as a first-in-class, full service project delivery firm in the Infrastructure and Building markets.”

CSA specializes in large municipal projects in the United States and Latin America. The company received billions of dollars in funding from the American Recovery and Reinvestment Act (ARRA, otherwise known as the economic stimulus package) to do several projects in Puerto Rico.