Brett Diersen
Brett  Diersen

Assistant Coach/Defensive Line/Recruiting Coordinator

Alma Mater, Year:
Huron (S.D.), 1998


Guide to the Huskie Bowl and Block Party

Activities Begin Saturday, April 23 at Noon


Family Atmosphere Breeds Success for NIU Defensive Line

Second Team All-MAC honoree Perez Ford leads the defensive front


Huskies By Position: Vacancies on the Defensive Line Nothing New to NIU

Diersen looks to rebuild defensive line for second straight year


Huskies Open Spring Football Practice Tuesday

Individual development key to team growth


Huskies By Position: Huskie Defensive Line

Younger players ready to step up and show their wares


NIU defeats Northwestern, 23-15

The Huskies played a dominant second-half of football in Evanston to defeat the Wildcats, 23-15.


SIGHTS & SOUNDS: NIU Football Releases New Uniforms

It seemed like just another team meeting in the McCareins Room at the Yordon Center Saturday, August 16. Take a look at behind the scenes footage of the Huskies unveiling of their new uniforms on August 16, pranking the team before revealing them.


Weekly Football Press Conference: Eastern Michigan

Week 9 football press conference with Head coach Rod Carey and players Perez Ford, Matt Krempel and Dechane Durante.


Northern Illinois Dominate Purdue, 55-24

Highlights from the Huskies historic 55-24 win over the Boilermakers at Ross-Ade Stadium.


NIU defeats Iowa, 30-27

NIU rallied for a 30-27 victory over Iowa Saturday.

Brett Diersen, a defensive line coach with extensive Midwest ties, is in his fourth year as Northern Illinois University's defensive line coach in 2016 and also serves as the program's recruiting coordinator.

In his three seasons at NIU, Diersen has coached five All-MAC selections as defensive end Perez Ford collected first team honors in 2015, making him a back-to-back All-MAC choice by league coaches.  In 2014, Ford and fellow end Jason Meehan were both honored, while Ken Bishop and Joe Windsor earned the recognition in 2013.  Since Diersen's arrival, Huskie defensive linemen have been responsible for  83 sacks for losses of 543 yards.  

In 2015, NIU defensive linemen accounted for 17 of NIU's 27 sacks with the team's top four sack totals by linemen.  The Huskies defensive line played a big role in NIU’s Mid-American Conference title in 2014 as the NIU defense amassed 32 sacks, forced 24 fumbles and held opposing rushers to 4.2 yards per carry.

Entering the 2013 campaign, Diersen had to rebuild a defensive line that lost three of four starters from the 2012 MAC Championship team.Under Diersen’s tutelage, senior nose guard Ken Bishop made 70 tackles, including seven tackles for loss, and two interceptions, on the way to becoming a seventh-round draft pick by the Dallas Cowboys in the 2014 NFL Draft.

Diersen spent the 2012 season at Florida Atlantic University where he coached the Owls’ defensive line and served as special teams coordinator. In 2011, he was the defensive ends coach and recruiting coordinator at Indiana after spending the 2008-10 seasons on the University of Nebraska coaching staff, where he assisted in working with special teams and a defensive line that featured Ndamukong Suh, who was named the Associated Press National Player of the Year and won the Bronko Nagurski, Rotary Lombardi, Outland and Chuck Bednarik awards.

 The connec­tion between Carey and Diersen dates back to 2000 when Carey took over as offensive coordinator and offensive line coach at Wisconsin-Stout, where Diersen was a graduate assistant on a Blue Devils team that went into the Division III playoffs undefeated. After coaching the defensive line, outside linebackers and special teams at the University of Dubuque from 2001-03, Diersen returned to UW-Stout as defensive coordinator in 2004. The two remained with the Blue Devils through 2006.

A native of Appleton, Wis., Diersen spent the 2007 campaign as defensive line coach at Minnesota State-Mankato before going to Nebraska the next season.

As a player, Diersen was a three-time all-conference defensive end at Huron (S.D.) University from 1994-98, where he earned his bachelor’s degree in 1998. He added a master’s degree in education from UW-Stout in 2005.

Diersen and his wife, Jenna, have two sons, Brody and Hudson.


2013- NIU (Defensive Line)
2012 Florida Atlantic (DL/Special Teams)
2011 Indiana (Recruiting Coord./DE)
2008-10 Nebraska (Intern/DL & Special Teams) 
2007 Minn. St.-Mankato (Defensive Line)
2004-06 Wisconsin-Stout (Def. Coord./DL/DBs)
2001-03 Dubuque (DL/OLB/Special Teams)
1998-2000  Wisconsin-Stout (Graduate Assistant)


2015  Poinsettia Bowl (NIU)
2014 Boca Raton Bowl (NIU)
2013 Poinsettia Bowl (NIU)
2010 Holiday Bowl (Nebraska)
2009 Holiday Bowl (Nebraska)
2009 Gator Bowl (Nebraska)
2000 Division III Playoffs (Wisconsin-Stout) 


1994-98  Huron (S.D.) (Defensive End) 


College B.S., Huron (S.D.), 1998
M.S., Wisconsin-Stout, 2004 
High School  Fox Valley Lutheran, 1994


Birthdate June 6, 1976
Birthplace Appleton, Wis.
Hometown  Appleton, Wis.
Family Wife, Jenna; sons, Brody (3) and Hudson (1) 
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