Maryland Lt. Gov. Anthony G. Brown. (Photo by Astrid Riecken For The Washington Post)

Maryland Lt. Gov. Anthony G. Brown (D) picked up an endorsement of his gubernatorial bid Monday from a labor organization representing roofers, plumbers, bricklayers and other building trades workers in the region.

The Community Hub for Opportunities in Construction Employment includes 28 unions that are part of the Washington D.C. Building and Construction Trades Council and the Baltimore Building and Construction Trades Council.

Brown’s campaign prematurely announced the organization’s support last week. On Monday, its leaders said they were prepared to go public with the endorsement.

“Anthony Brown has earned our endorsement,” said Mark Coles, executive director of the regional building trades organization. “We are excited for what his leadership will mean for the Maryland economy, its businesses and the construction industry.”

Brown faces Attorney General Douglas F. Gansler (D) and Del. Heather R. Mizeur (D-Montgomery) in the June Democratic primary.