Zach Arnett
| Current position | |
|---|---|
| Title | Defensive Coordinator |
| Team | Mississippi State |
| Biographical details | |
| Born | September 10, 1986 Albuquerque, New Mexico, U.S. |
| Playing career | |
| 2005–2008 | New Mexico |
| Position | Linebacker |
| Coaching career (HC unless noted) | |
| 2011–2013 | San Diego State (GA) |
| 2014–2017 | San Diego State (LB) |
| 2018–2019 | San Diego State (DC/LB) |
| 2020 | Mississippi State (DC/LB) |
| 2021–2022 | Mississippi State (DC/S) |
| 2023 | Mississippi State |
| 2024 | Ole Miss (analyst) |
| 2025 | Florida State (analyst) |
| 2026–present | Mississippi State (DC) |
| Head coaching record | |
| Overall | 5–6 |
| Bowls | 1–0 |
Zachary Arnett (born September 10, 1986) is an American football coach who is the defensive coordinator at Mississippi State. He served as the head coach at Mississippi State in 2023 and previous stint as the defensive coordinator at Mississippi State from 2020 to 2022. He also briefly served as the defensive coordinator at the University of Nevada, Las Vegas (UNLV) from December 2024 until his resignation in April 2025.
Arnett played college football at the University of New Mexico as a linebacker from 2005 to 2008. Prior to his tenure at Mississippi State, he held various assistant coaching positions at San Diego State University from 2011 to 2019.