Arkansas says Wisconsin defensive coordinator Chris Ash will join former Badgers coach Bret Bielema with the Razorbacks.
Ash worked under Bielema at Wisconsin for the last three seasons, including the last two as co-defensive coordinator. He'll remain with the Badgers through their Rose Bowl appearance against Stanford.
The hiring is Bielema's first of an assistant coach since being hired last week at Arkansas.
Ash came to Wisconsin from Iowa State, taking over as the Badgers defensive backs coach in 2010. The 38-year-old was elevated to defensive coordinator in 2011, and he helped lead a Wisconsin defense that was 13th in the country - allowing 19 points per game.