Rutgers coach Chris Ash's defensive staff is coming into focus, as he is set to hire Bill Busch as defensive backs coach, according to a source with knowledge of the situation.

Busch, 50, is in his first season as a defensive quality control coach at Ohio State. He was the secondary coach at Wisconsin from 2013-14.

Rutgers announced Busch's hiring on Tuesday afternoon.

A Pender, Neb., native, Busch has 26 years of experience in coaching. Rutgers will be Busch's fourth Big Ten school. In addition to Ohio State and Wisconsin, Busch has worked at Nebraska as a graduate assistant (1990-93) and special teams coordinator from 2004-07. Busch coached the outside linebackers in 2004 and the safeties from 2005-07 at Nebraska.

Ash, who has been the co-defensive coordinator at Ohio State for the past two years, worked with Busch this season.

Busch was at Utah State from 2009-12 as defensive coordinator, special teams coordinator, associate head coach and safeties coach. He also served as defensive backs coach at Utah from 2001-03. Ohio State coach Urban Meyer was the head coach at Utah from 2003-04.

Busch was named the 2012 Defensive Backs Coach of the Year by footballscoop.com in a vote of his peers.

Busch's hiring comes one day after Ash added Aaron Henry as assistant defensive backs coach. Busch will be in charge of the whole secondary with Henry assisting with a focus on the cornerbacks, according to a person familiar with the situation.

Ash has now filled six of his nine full-time assistant spots. In addition to Busch and Henry, Ash has hired offensive coordinator Drew Mehringer, special teams coordinator Vince Okruch, offensive line coach A.J. Blazek and wide receivers coach Zak Kuhr. Ash is expected to fill the final three staff openings with a defensive coordinator, defensive line coach and running backs coach.

Dan Duggan may be reached at dduggan@njadvancemedia.com. Follow him on Twitter @DDuggan21. Find NJ.com Rutgers Football on Facebook.