Early coaching In 2001, Nagy returned to Manheim Central High School as quarterbacks coach. The following year, he was invited to serve the same position at
Cedar Crest High School in
Lebanon, Pennsylvania, where his wife, Stacey, was the girls' track coach. In addition to working with the varsity team, Nagy was also the junior varsity football team's head coach. He worked at Cedar Crest until 2003. After interning with the
Philadelphia Eagles during the 2008 NFL offseason, Nagy joined
Palmyra Area High School in
Palmyra, Pennsylvania as offensive coordinator. The Cougars went 5–5 in his first season. He stayed with the team through 2009, during which they recorded a 4–6 record, before departing for a full-time job in the NFL.
Philadelphia Eagles In 2009, Veach invited Nagy to return to Philadelphia and intern for the Eagles again. Furthermore, teams were not allowed to hide potential players in coaching positions.
Adam DiMichele was eventually signed to fill the open slot. After a
4–12 campaign in 2012, Reid was fired by the Eagles and Nagy was not retained under new head coach
Chip Kelly.
Kansas City Chiefs Following Reid being hired as the head coach for
Kansas City Chiefs, he proceeded to hire Pederson and Nagy as the offensive coordinator and quarterbacks coach, respectively, to his staff. Although Reid called the plays, Nagy directly communicated with the quarterback. Before the 2017 season, the
New York Jets attempted to hire Nagy as offensive coordinator, but the move was blocked by the Chiefs; then-Jets head coach
Todd Bowles is a family friend of the Nagys, having played for Nagy's father in high school as well as working alongside Nagy on the Eagles coaching staff in
2012. When Childress was promoted to assistant head coach, Nagy became the lone offensive coordinator. Under Nagy, the Chiefs finished the regular season 4–1 and averaged 28.6 points during the stretch. Kansas City's offense, which ranked 20th in 2016, was the fifth-best unit in 2017; quarterback
Alex Smith led the NFL in passer rating with 104.7 as he threw for a career-best 26 touchdown passes and 4,042 passing yards. In the Wild Card Round, the Chiefs were defeated by the
Tennessee Titans after the Titans erased a 21–3 deficit in the second half to win 22–21; amid rumors that Reid was calling plays again, Nagy reaffirmed he was doing so and called the game a "failure in my book."
Chicago Bears On January 8, 2018, Nagy was hired by the
Chicago Bears to become the 16th head coach in team history. Reid gave his support for Nagy and called him the "best head-coaching candidate he's ever had." Given Nagy's relatively young age at 39, the fact that he was even given serious consideration for a head coaching position was cited as one of the first examples of the "
Sean McVay effect", or the rising trend of teams hiring younger head coaches that specialized in
offensive strategy. Nagy was the first Delaware alumnus to become an NFL head coach. In assembling his staff, Nagy convinced defensive coordinator
Vic Fangio, who led a top-ten-ranked Bears defense in 2017 and had also interviewed for the team's head coaching job, and his assistants to stay. Quarterbacks coach
Dave Ragone was the lone Fox offensive assistant to remain in Chicago. To fill the other openings, Nagy hired coaches with previous ties to him, including Childress as a senior offensive consultant through the 2018 offseason and training camp, former Chiefs assistant special teams coordinator
Brock Olivo in the same position, Ginn and Eagles colleague
Bill Shuey as quality control coaches, In Nagy's first season as head coach, the Bears won the
NFC North for the first time since 2010. They defeated the
Green Bay Packers on December 16 to improve to 10–4, as Nagy became the second Bears' rookie head coach in team history to win 10 games, joining
George Halas in 1920. Nagy ended the regular season with two more wins, finishing his first year as a head coach with a 12–4 record; he and
Paddy Driscoll (1956) are the only coaches in Bears history to have a winning record and qualify for the playoffs in their debut seasons. However, the Bears were narrowly defeated by Pederson and the Eagles in the Wild Card Round 16–15 after the game-winning field goal
was blocked and hit the crossbar twice. In January 2019, Nagy received Coach of the Year honors from the
Pro Football Writers Association and
Associated Press. He was the first Bears coach to be given the AP award since
Lovie Smith in 2005 and the fifth in team history. Nagy also became the fifth coach in team history to record at least 12 wins in a season, joining George Halas, Mike Ditka, Dick Jauron, and Lovie Smith. After the 2018 season, Fangio departed the Bears to become the
Denver Broncos head coach; to replace him, Nagy hired
Chuck Pagano as defensive coordinator. Nagy also reunited with Childress, who rejoined the Bears as a senior offensive assistant, Despite a 3–1 start to the
2019 season, offensive struggles and a four-game losing streak sank them to 4–6. Although the team won three straight games to remain in playoff contention, a Week 15 loss to the Packers dropped them to 7–7 and ended their postseason hopes. The Bears finished the season 8–8, while Nagy's combined 20 wins in 2018 and 2019 were the most by a Bears head coach in his first two seasons. Chicago continued to experience difficulties through the season, leading to an offense ranked 29th in the league for the 2019 season. Season's end inspired offensive staff changes such as firing offensive coordinator
Mark Helfrich. Among Nagy's new hirings for the
2020 season were offensive line coach
Juan Castillo, who worked with him in Philadelphia, and quarterbacks coach
John DeFilippo, also a former Eagles coach. The team also traded for quarterback
Nick Foles, who worked with Nagy in Philadelphia and Kansas City, to compete with starter
Mitchell Trubisky. The Bears started the season 5–1 but followed with a six-game losing streak. With the offense's struggles persisting through the first nine games of the year and through the stretch, including being ranked 29th in points per game and 31st in yards per play, Nagy relinquished play calling duties to new offensive coordinator
Bill Lazor. Despite losing a Week 17 contest to the
Packers where a win would have guaranteed them a playoff spot, the 8–8 Bears made the postseason for the second time in three years under Nagy due to winning a tiebreaker with the
Arizona Cardinals. They were subsequently eliminated in the Wild Card round with a 21–9 road loss to the
New Orleans Saints. Following Trubisky's departure via free agency, the
2021 season began with
Andy Dalton as the Bears' starting quarterback over first-round rookie
Justin Fields, while Nagy promoted safeties coach
Sean Desai to defensive coordinator after Pagano retired. Fields was named the starter in Week 3 against the
Cleveland Browns after Dalton suffered an injury, but the offense struggled with just 47 net yards as Fields was sacked nine times and recorded only one net passing yard. Nagy surrendered play calling back to Lazor for the next week's game against Detroit. Despite a 3–2 start, the Bears went on a five-game losing streak for the third consecutive year with Fields suffering multiple injuries. On October 25, Nagy tested positive for
COVID-19, resulting in special teams coordinator
Chris Tabor assuming head coaching duties for Week 8 against the
San Francisco 49ers. Chicago finished the season with a 6–11 record, their first losing season since 2017 and Nagy's first as a head coach. In a statement released following his dismissal, Nagy thanked the team "for the opportunity to lead one of the game's most storied franchises" and described his stint as "four years I'll always remember."
Kansas City Chiefs (second stint) Nagy was brought back by the Chiefs on February 25, 2022, as a senior assistant and quarterbacks coach, replacing the outgoing
Mike Kafka. Reid described rehiring Nagy as the "logical answer" as he wanted a coach familiar with the current staff and roster, particularly quarterback
Patrick Mahomes, with whom Nagy worked in 2017. In his first season back with the Chiefs, they won
Super Bowl LVII against the
Philadelphia Eagles, his first Super Bowl victory. Nagy was promoted to offensive coordinator on February 24, 2023, his second time at the position for the Chiefs. Nagy helped the Chiefs win
Super Bowl LVIII after defeating the
San Francisco 49ers 25–22. Following the 6–11
2025 season, Nagy's contract with the Chiefs officially ended. With Nagy choosing to not attempt to negotiate a contract extension and his desire to interview to become a head coach within the NFL, the Chiefs chose to hire
Eric Bieniemy as their new offensive coordinator for the 2026 season.
New York Giants Nagy was hired by the
New York Giants to be their new offensive coordinator on February 3, 2026 under newly hired head coach
John Harbaugh. ==Coaching style==