BGR Government Affairs is working for Greg Kelly, who was arrested in Japan in November for allegedly helping former Nissan CEO now fugitive Carlos Ghosn hide compensation.
Ghosn, who was charged with corruption, jumped bail and escaped to Lebanon in January.
Kelly, who was Ghosn's chief of staff and head of internal auditing, has been locked up in Japan as he awaits trial. He maintains his innocence.
BGR founding chairman Haley Barbour, former Republican National Committee chair and Mississippi governor, and chairman Lanny Griffith, aide to president Bush I, are leading the justice for Kelly effort.
The New York Times has profiled Kelly as the "man left behind" in the Ghosn mess.
Republican Senators Lamar Alexander (TN), Marsha Blackburn (TN) and Roger Wicker (MS) penned an op-ed piece in Real Clear Politics in which they said Kelly is "a victim of Japanese hostage justice."
Franklin (TN) is the site of Nissan's US headquarters.