Domata Peko is in his first season as the Steelers' defensive line coach in 2026. He most recently served as the defensive line coach at Colorado in 2025.

Peko – who served as a defensive assistant for Dallas in 2024 – entered coaching after a 15-year playing career in the NFL. Peko played in 214 career games (194 starts) for Cincinnati (2006-16), Denver (2017-18), Baltimore (2019) and Arizona (2020). His 214 games played are the 10th-most by a defensive tackle in NFL history.

Domata Peko is in his first season as the Steelers' defensive line coach in 2026. He most recently served as the defensive line coach at Colorado in 2025.

Peko – who served as a defensive assistant for Dallas in 2024 – entered coaching after a 15-year playing career in the NFL. Peko played in 214 career games (194 starts) for Cincinnati (2006-16), Denver (2017-18), Baltimore (2019) and Arizona (2020). His 214 games played are the 10th-most by a defensive tackle in NFL history. 

Peko registered 615 tackles (320 solo), 20.0 sacks, 38 TFL, 48 QB hits, 14 passes defensed, five fumble recoveries and two forced fumbles. His 615 tackles are the 11th-most by a defensive tackle in League history.

Peko played two years at Michigan State (2004-05), after spending two years at College of the Canyons (2002-03). He started every game as a senior in 2005 and registered 53 tackles, 1.0 sack, two fumble recoveries and one forced fumble.

He and his wife, Anna, have three sons, Domata Jr., Joseph and Samson.