Koch Industries, the privately held conglomerate controlled by Charles and David Koch, has signed on at powerhouse Republican firm Clark Lytle & Geduldig.†

The firm represents Koch Companies Public Sector, which is the D.C. office of Wichita-based Koch, on energy, trade and investment issues.

Roll Call reported in April that revenues at CL&G have soared since the Republican takeover of Congress last year.

Earlier this year, the firm strengthened those GOP ties by recruiting Jay Cranford, a policy aide to House Speaker John Boehner, to boost its energy and technology client roster. CL&G partner Sam Geduldig once worked for Boehner and Congressman Roy Blunt, who is now Missouriís Senator.

Other CL&G staffers working the Koch business are Steve Clark, ex-government affairs VP at Ameritech; Gary Lytle, former senior VP-federal affairs at Qwest; Deborah Pryce, ex-Republican Congresswoman from Ohio, and Amy Wren, finance director to former GOP Majority Leader Tom Delay.