The San Francisco 49ers reportedly promoted Eric Mangini to defensive coordinator on Thursday.

Mangini, a longtime defensive coach who coached the team’s tight ends in 2014, will switch back to defense under new coach Jim Tomsula, according to reports by ESPN’s Adam Schefter and NFL Media’s Ian Rapoport.

Tomsula, promoted from defensive line coach last week to replace Jim Harbaugh, reportedly also hired Tony Sparano to coach tight ends. Sparano was the Oakland Raiders’ interim head coach in 2014.

Tomsula also is expected to hire Oakland defensive coordinator Jason Tarver as linebackers coach and reportedly wants to talk to former New York Giants defensive coordinator Perry Fewell, too.

The 49ers also still need an offensive coordinator.

Mangini has been with the 49ers since 2013, when he joined Jim Harbaugh’s staff as an offensive consultant.

He previously was the head coach of the New York Jets (2006-08) and Cleveland Browns (2009-10) and spent 2011-12 as a TV analyst.

He started his NFL career under Bill Belichick in New England, working as the Patriots’ secondary coach from 2000 to 2004 and defensive coordinator in 2005.

Mangini had interviewed for the Washington Redskins’ defensive coordinator job and the Raiders’ head coaching job, which went to Jack Del Rio.

In San Francisco, Mangini replaces former defensive coordinator Vic Fangio, who this week joined John Fox’s new staff as DC of the Chicago Bears.