Denny Doombos begins his third season as the Cowboys' defensive coordinator.

Doornbos was previously at Bryant University coaching fullbacks and defensive ends under Marty Fine.

Doornbos spent four seasons at The Citadel starting out as the assistant defensive coordinator/defensive line coach. In 2012, he was named the defensive coordinator/assistant head coach/defensive line coach. He coached three All-Conference defensive linemen in the four years he was there. 

In 2009, Doornbos spent a season at St. Norbert College as defensive coordinator, where they had a 9-1 record. 

Doornbos in 2003 was at Northern Illinois University coaching linebackers. This was the first team in MAC history to beat three BCS schools in the same year (beat Alabama, Maryland and Iowa State). The Huskies finished the year with a 10-2 record. 

From 2004-07, he was promoted to defensive coordinator at NIU and continued coaching the linebackers. He had four all-conference linebackers in five seasons. In 2005, their defense was No. 1 in the Mid-American Conference for scoring defense.

Prior to arriving at Northern Illinois University, Doornbos spent 14 years at the United States Military Academy (Army), including 10 years as the defensive coordinator. In 1996, when Army went 10-2 and lost a berth to the Independence Bowl against Auburn University, the unit was ranked No. 6 nationally in rushing defense (89.0 ypg), No. 9 in total defense (256.3 ypg) and No. 18 in scoring defense (17.5 ppg). In addition to his role as defensive coordinator, he coached the defensive ends from 1988-99 after spending his first two seasons (1986-87) as the tight ends coach. That year, his tight end, Rob Dickerson, was named All-East. In the 14 years Doornbos coached at Army, they beat archrival Navy nine times. 

From 1983-85, Doornbos was the defensive coordinator and inside linebacker coach at the UTEP. 

In 1982, Doornbos worked with the inside linebackers under legendary coach Bo Schembechler at the University of Michigan when the Wolverines won the Big Ten Conference title and played UCLA in the Rose Bowl.

In 1981, Doornbos coached the defensive line at Kent State University, and in 1980, coached the outside linebackers at Boston College. 

From 1978-79, Doornbos was at the University of Illinois as the head JV coach and assisted with the defensive line. 

His coaching career began at Western Michigan University after an injury ended his playing career. As an undergraduate, Doornbos assisted with the secondary, inside linebackers, and offensive line. 

In 1978, Doornbos graduated with a Bachelor of Science degree in Industrial Education from Western Michigan University.

As four-sport letterman in football (3), basketball (3), baseball (2), and track (1) at Jenison High School (Michigan), Doornbos was an honorable mention all-state linebacker and tight end as a senior. 

Doornbos is from Jenison, Michigan and is married to the former Helen Sandford of Winchester, MA. They have two sons, Blaik and Darik.

Post Season Experience:
2006 Poinsettia Bowl (Northern Illinois)
2005 MAC Championship Game (Northern Illinois)
2004 Silicone Valley Bowl (Northern Illinois)
1996 Independence Bowl (Army)
1988 Sun Bowl (Army)
1982 Rose Bowl (Michigan)

Doornbos Coaching History:
1974 - Starting safety at Western Michigan University
1975-77 - Student Assistant Football Coach at Western Michigan University
1978-79 - University of Illinois Head JV Coach; assisted with Defensive Line
1980 - Boston College Outside Linebackers (1 All-East Linebacker)
1981 - Kent State University Defensive Line/Special Teams Coordinator
1982 - University of Michigan Linebackers
1983-87 - United States Military Academy (Army) Tight Ends (1 All-East Tight End)
1988-90 - United States Military Academy (Army) Defensive Ends
1990-99 - United States Military Academy (Army) Defensive Coordinator/Defensive Ends
2003 - Northern Illinois University Linebackers 
2004-07 - Northern Illinois University Defensive Coordinator/Linebackers (4 All-Conference Linebackers in 5 years)
2009 - St. Norbert College Defensive Coordinator
2010-11 - The Citadel Assistant Defensive Coordinator/Defensive Line
2012-13 - The Citadel Assistant Head Coach/Defensive Coordinator/Defensive Line (3 All-Conference Def. Linemen in 4 years)
2015 - Bryant University Fullbacks
2016 - Bryant University Defensive Ends
2017 - present - New Mexico Highlands Defensive Coordinator