August Mangin enters his second season with the Lions as a defensive assistant in 2026. Prior to joining Detroit, Mangin spent four seasons with the San Francisco 49ers as special teams quality control/game management specialist (2022-24) and special teams quality control (2021).

August Mangin enters his second season with the Lions as a defensive assistant in 2026. Prior to joining Detroit, Mangin spent four seasons with the San Francisco 49ers as special teams quality control/game management specialist (2022-24) and special teams quality control (2021).

Last season, Mangin assisted a linebacker unit that ranked first in sacks (12.5) and run stops (94), tiedfor-second in tackles for loss or no gain (34) and third in pressures (56) among all NFL linebacker groups. The team's 12.5 sacks from linebackers were the most for the Lions since 2019.

Mangin also helped guide LB Jack Campbell to earn 2025 First-Team AP All-Pro and Pro Bowl selections for the first time in his career after he ranked third in the NFL with 166 tackles. Campbell also became the first player in NFL history to produce at least 155 defensive tackles and 10 special teams tackles in a season.

In 2023 with the 49ers, Mangin guided the development of rookie K Jake Moody, who connected on 21- of-25 field goal attempts (84.0%) and 60-of-61 extra point attempts (98.4%). His 60 made extra points led the NFL. In Week 2 at the Los Angeles Rams, Moody recorded the longest field goal (57 yards) by a rookie in franchise history, which was also the second-longest in franchise history.

Throughout his time with the 49ers, Mangin worked with P Mitch Wishnowsky who finished the 2023 season with the second-highest percentage of punts placed inside the 20-yard line (50.0%). The year prior, Wishnowsky led the League with 52.5% of punts landing inside the 20-yard line and earned NFC Special Teams Player of the Month recognition (September) for the second time of his career. In 2022, Mangin tutored WR Ray-Ray McLoud III as he finished the season ranked second in the NFL in punt return yards with 356.

Prior to San Francisco, Mangin served as lead defensive analyst for LSU from 2019-20. In 2019, Mangin assisted the Tigers in securing a 15-0 season and a CFP National Championship. The LSU defensive unit allowed an average of 21.9 points per game and just 222.7 passing yards per game.

Mangin went to LSU following one season (2018) as a special teams analyst at the University of Alabama. The Crimson Tide finished the season with a 14-1 record, which included a trip to the College Football Playoff. Alabama averaged 45.6 points per game and allowed just 18.1 points per game on the year.

From 2014-17, Mangin served as the special teams coordinator and a different position coach each season at Northwestern State University, his second stint with the school, having coached as a graduate assistant special teams/tight ends coach in 2011. Throughout his time with the Demons, Mangin coached special teams players WR Ed Eagan and K Chris Moore. In 2014, Eagan set single-season school records in kickoff returns (45) and kickoff return yardage (1,045) and earned Associated Press Second-Team AllAmerica honors as an all-purpose player and Special Teams Player of the Year honors from the College Sports Network. Eagan also finished his career as Northwestern State's all-time leader in kickoff return yardage (2,125).

As a junior in 2014, Moore set school single-season records for field goal attempts (26), made extra points (42) and extra point attempts (43). He finished his career as Northwestern State's all-time leading scorer (248 points) and set the school record for career field goals (45). Northwestern State's punt coverage unit led the NCAA in punt return defense during Mangin's first season back with the school in 2014, allowing nine punt return yards all season. From 2014-15, the Demons allowed a total of 85 punt return yards.

Prior to joining Northwestern State for the second time, Mangin spent the 2012-13 seasons as a graduate assistant special teams/tight ends coach at LSU under longtime NFL special teams coach Thomas McGaughey. The Tigers saw future NFL Draft choices WR Odell Beckham, Jr. and S Tyrann Mathieu earn AllAmerica honors as returners, with K Drew Alleman being named Second-Team All- SEC in 2012.

A native of Lewisville, Texas, Mangin spent five years (2005-09) at LSU as a walk-on fullback. He graduated from LSU with a degree in education (K-12) with a concentration in kinesiology. He later earned his master's degree in sport administration from Northwestern State in 2012. Mangin and his wife, Lindsay, have one daughter Margot.