Rutgers coach Chris Ash is shaking up his coaching staff.

On the heels of a 1-11 campaign, Ash is expected to hire former Maryland defensive coordinator Andy Buh to the same post, a person with knowledge of the decision told NJ Advance Media.

Buh will replace Jay Niemann, the Scarlet Knights' defensive coordinator under Ash for the past three seasons. Niemann’s dismissal ends three months of speculation after Ash decided to take a bigger role in the defensive play-calling duty midway through his third campaign.

Ash is also expected to replace Toby Neinas, who coached Rutgers' outside linebackers and specialists this past season.

The person spoke to NJ Advance Media on the condition of anonymity because Ash has not yet announced the hiring officially. ScarletNation.com was the first to report Buh’s appointment.

Over the past three seasons with Niemann as defensive coordinator, Rutgers ranked 116th (37.5 points-allowed-per-game), 76th (28.3) and 90th nationally in scoring defense.

The Scarlet Knights ranked 23rd nationally in pass defense, 108th nationally in rush defense and 70th nationally in total defense in 2018.

Like many of his previous coaching hires, Buh (pronounced "boo'') has a connection with the Rutgers head coach. Ash and Buh coached at Wisconsin in 2012, when Ash served as the co-defensive coordinator/defensive backs coach and Buh handled the linebacker coaching duty.

A native of Escondido, Calif., who played linebacker at both Palomar College and Nevada in the early 1990s, Buh brings 21 years of coaching experience, including the last three seasons at Maryland.

Prior to his stint working at Maryland, Buh served as the outside linebackers coach and special teams coordinator at Kentucky in 2015. Before that, Buh held the the defensive-coordinator gig at Stanford, Nevada and Cal.

Niemann, who earned a base salary of $477,405 this past season, has a contract that expires at the end of June 2019.

According to The Washington Post, Buh signed a three-year contract worth $1.88 million in April 2016 when he was hired by then-Terps coach D.J. Durkin.

Rutgers previously announced the addition of Henry Baker as cornerbacks coach and passing-game coordinator. Baker previously served as the Rutgers cornerbacks coach in 2017 before spending this past season at North Carolina.

NJ Advance Media’s James Kratch contributed to this report.

Keith Sargeant may be reached at ksargeant@njadvancemedia.com. Follow him on Twitter @KSargeantNJ. Find NJ.com Rutgers Football on Facebook.