WASHINGTON — He may have been the biggest loser in last year’s Democratic congressional primaries when he was beaten by Alexandria Ocasio-Cortez, but Joe Crowley proved he’s still a hot commodity in DC by joining one of the top lobbying firms.

Crowley joined Squire Patton Boggs, along with former Republican Rep. Bill Shuster of Pennsylvania, who retired last year.

“We were honored to hear from many of the great firms in town since leaving Congress, and chose what we think is the very best place to continue our careers,” Crowley said in a statement on Tuesday.

In joining Squire Patton Boggs, Crowley and Shuster join another bipartisan duo, former Sens. John Breaux, a Louisiana Democrat, and Trent Lott, a Mississippi Republican.

“They are a blockbuster addition to our global, bipartisan public policy practice,” Breaux and Lott said in a joint statement.

The firm’s roster also includes former House Speaker John Boehner (R-Ohio), Rep. Jack Kingston (R-Ga.) and Secretary of Transportation Rodney Slater, a Democrat from Arkansas.

Crowley retains a political position in New York, that of chairman of the Queens Democratic Party.

A spokesman for Squire Patton Boggs could not say whether he’ll keep that post. Crowley himself refused to take calls.

He wouldn’t be first party leader in New York City to earn his living as a lobbyist.

Manhattan Democratic leader Keith Wright kept his position after joining Davidoff Hutcher & Citron LLP in January 2017.

Under the law, both Wright and Crowley can keep both jobs.

But Zephyr Teachout, who ran against Gov. Cuomo in 2014, called Crowley’s move to K Street a “shameful choice.”

“Joe Crowley is selling twenty years of the goodwill of his constituents to the wealthy clients of Squire Patton Boggs,” Teachout tweeted Tuesday.