After his retirement, Munchak continued his association with the Houston franchise by becoming an assistant coach. He joined the staff in 1994 and stayed with the franchise after it moved to Tennessee and became known as the Tennessee Titans, eventually becoming its offensive line coach.
Munchak became Titans head coach in 2011 and was fired after the 2013 season, ending his thirty-one year association with the franchise. He currently serves as offensive line coach for the Pittsburgh Steelers.
Munchak was an offensive lineman for Penn State from 1978-1981. During this time he was a starter for the 1979 and 1981 seasons; however, he missed the 1980 season due to knee injury. During his senior year, he was named a second team All-American and was subsequently drafted 8th overall by the Houston Oilers.
During the 1982 NFL Draft, Munchak was chosen as the Houston Oilers' first round draft pick (8th overall), making him the first offensive lineman drafted that year. In his rookie season, he quickly earned a starting position at the left guard position. He remained in that position for 12 seasons. During that time he garnered nine Pro Bowl nominations, four All-Pro, nine Second Team All-Pro, seven All-AFC, and four second team All-Pro selections. In addition, he was selected for the 1980s All-Decade Team. Munchak's 12-year tenure tied for second most seasons played with the Houston Oilers.
In 1994, only one year after retiring as a player, Munchak joined the Houston Oilers staff as an offensive assistant/quality control coach. In 1997 Munchak was named offensive line coach of the newly relocated Tennessee Oilers, a position he held for the next fourteen seasons. Following Jeff Fisher's departure as head coach, Munchak was named head coach of the Titans on February 7, 2011. The 2011 season marked his 30th season with the organization. The 2013 season, Munchak's third as head coach, yielded a record of 7-9. That offseason, franchise CEO Tommy Smith and general manager Ruston Webster requested that Munchak replace at least six assistant coaches. Munchak disagreed with some of these requests and refused to fully enact those changes in his staff. Munchak was consequently relieved of his position on January 4, 2014. The 2014 season marked the first season since 1982 that Munchak had no involvement (as a player or coach) with the Oilers/Titans franchise. Munchak became the offensive line coach for the Pittsburgh Steelers in 2014. In the 2016 NFL playoffs , Munchak yanked Cincinnati BengalsReggie Nelson's hair. Munchak drew a 15 yard unsportsmanlike conduct penalty and was issued a $10,000 fine by the NFL for the incident with Nelson.