Washington-based Prism Public Affairs is merging with D.C- and Boston-based Rasky Baerlein Strategic Communications to form a 55-person public affairs outfit, the firms announced Thursday.

The move is the latest in an ongoing consolidation effort in the communications and public relations industry.

The firm will be called Rasky Baerlein Strategic Communications with a combined revenue of $15 million, which makes it one of the top 25 independent public relations firms in the United States.

Prior to the merger, Rasky Baerlein had 38 professionals and Prism had 17 firmwide. The combination will boost Rasky Baerlein’s Washington presence from nine to 25 people. Prism partners Dale Leibach, Amanda Deaver and Rex Granum will join the Rasky Baerlein partnership.

Rasky and Prism’s Leibach have previously worked together on presidential and congressional campaigns.

“While this is not the first time we have talked about getting together, it is definitely the right time,” said Baerlein chairman Larry Rasky.