Hoping everyone will just get along and make a difference……

Rep. Paul Ryan, girding for the challenges of his likely election as Speaker of the House, on Sunday announced he had chosen a conservative with wide experience advising Republican congressional leaders to serve as his chief of staff.

David Hoppe is now a lobbyist but had a long career on Capitol Hill as an aide to former Rep. Jack Kemp — one of Mr. Ryan’s own mentors — as well as to former Sens. Trent Lott and Jon Kyl when they were in the Senate GOP leadership.

As Mr. Ryan, a Wisconsin Republican, prepares to become speaker, one of his biggest challenges will be repairing and maintaining relations between the GOP leadership and the party’s most conservative element, which was largely responsible for driving Speaker John Boehner to announce his retirement.

In a Sunday statement announcing Mr. Hoppe’s selection, Mr. Ryan emphasized his conservative roots, which includes some experience as a vice president of the Heritage Foundation, a conservative think tank whose political affiliate has been a thorn in Mr. Boehner’s side.

“Dave has been a foot soldier in the conservative movement, and he is a good friend,” Mr. Ryan said. “His decades of experience fighting for the cause and his passionate commitment to conservative principles are just what I’m looking for to create a new kind of speakership.”

Messrs. Ryan and Hoppe became close friends when they worked together in the 1990s for Mr. Kemp at Empower America, a conservative think tank. Mr. Hoppe served as a congressional aide for 29 years, but now works at one of Washington’s premier lobbying firms, Squire Patton Boggs.