David Stewart, former House Speaker John Boehner's policy director, will reunite with the Republican leader at Squire Patton Boggs later this month.

Stewart worked for Boehner from 2008 to 2014. As staff director for the House Ways and Means Committee's GOP majority under Texas Rep. Kevin Brady since 2015, he was part of the group that helped to shepherd Republicans' tax reform legislation through Congress last year.

Squire announced Monday that Stewart, who is not a lawyer, will work as principal in the firm's public policy practice.

“From the U.S. trade agreements with Korea, Colombia, and Panama implemented during the first year of my speakership to the final budget deal I negotiated with President Obama, David was the steady hand who mastered the political and policy dynamics and guided these projects to successful completion,” Boehner said in a statement, “just as he did last year for Chairman Brady and Speaker Ryan on tax reform.”

Boehner, who joined Squire in 2016 as a senior strategic adviser, praised Stewart as widely known throughout the executive and legislative branches of the federal government, adding that he would be an “enormous asset” for Squire's clients.

Stewart has worked on presidential campaigns in addition to his work in government, including a stint as 2012 GOP presidential nominee Mitt Romney's economic policy director. His start date at Squire remains to be determined, according to the firm.

Stewart's departure from Congress comes amid an exodus of leading GOP congressmen ahead of the 2018 midterm elections and ongoing investigations of President Donald Trump. Twenty-seven House Republicans are retiring outright or have already resigned before the 2018 elections, according to The Atlantic, including high-profile politicians such as House Speaker Paul Ryan, South Carolina Congressman Trey Gowdy, and House Judiciary Committee chairman Bob Goodlatte of Virginia.

Stewart's new firm has also been making headlines lately. After the FBI raided the home and offices of Trump lawyer Michael Cohen last week, Squire said it had severed a strategic alliance it inked with Cohen after the election, and would cooperate with the FBI. The scope of Cohen's work at Squire remains unclear.

Stewart's new gig appears much more defined than Cohen's, as Boehner noted Stewart would counsel clients on how to understand the changes to U.S. economic policy in the Trump era and anticipate what is coming next.