The largest labor union representing employees from the New York City Housing Authority (NYCHA) and City University of New York (CUNY) are ready to throw their support for Councilman Ritchie Torres in his run for the 15th Congressional District, adding to the number of labor unions already backing Torres.

Teamsters Local 237 will announce its support Tuesday morning for Torres, one of the more highly visible candidates for the South Bronx race that began in March when current seat-holder, Jose Serrano, announced he won’t run for re-election.

“Teamsters Local 237 supports Ritchie Torres in his congressional bid because we know from our experience with him as council member that he is an ardent fighter for working men and women, and has been consistently on the right side of issues that matter to us the most. We look forward to working with him as he brings that same tenacity to Washington,” said Gregory Floyd, president of Teamsters Local 237 and vice president at-large for the general board of the International Brotherhood of Teamsters, the umbrella group of Local 237.

On top of NYCHA and CUNY, Teamsters Local 237 also represents workers in several New York City agencies, NYC Health + Hospitals Corporation, and the Jacob Javits Center.

Torres can expect the endorsement to be tacked with robocalls, letters of endorsement, and an appearance from Torres on the radio show, “Reaching Out With Gregory Floyd.”

The support will mark the sixth endorsement from a labor union. Steamfitters, Ironworkers Local 46, Hotels Trades Council, LiUNA, and Machinists have also thrown their support.

The increased backing will come in handy for Torres, who’s facing fierce competition in other progressive challengers vying for the same seat whilst building a record from social conservative Democrat and fellow Councilman Rev. Ruben Diaz Sr., a well known face within the 15th Congressional District that overlaps with Diaz’s 18th Council District.

His support also comes on the heels of fundraising figures that show Torres leading the way. Totals show Torres’ campaign accrued $855,000 since March.

Torres’ rapport with the union can be chalked up to his days as chair of the New York City Council’s Public Housing Committee, where Torres sounded the alarm on deplorable conditions across the network of NYCHA properties across the city.

“Throughout my time in the City Council, I’ve stood with the Teamsters Local 237 as we fought for NYCHA employees and residents together,” said Torres in a statement. “In Congress, I will continue to fight for public housing agencies and tenants across the country, and with the Teamsters’ support, we will ensure that the voices of NYCHA residents are not forgotten.”

Torres has also landed four endorsements from the New York City Council, who include members Stephen Levin, Brad Lander, Helen Rosenthal, and Antonio Reynoso. His former colleague and council speaker Melissa Mark-Viverito, who secured two endorsements from her successor, Councilwoman Diana Ayala and Councilwoman Margarate Chin.