Who are the longest-tenured head coaches in NFL history? - ESPN
As of the start of the 2025 NFL season, Mike Tomlin, John Harbaugh, and Andy Reid were the longest-tenured active coaches in the league. At the end of the season, Harbaugh was fired from the Baltimore Ravens after 18 years. Tomlin is now the longest-tenured active coach in the league, having led the Pittsburgh Steelers for 19 years. Reid has been at the helm of the Kansas City Chiefs for 13 years. Sean McDermott (Buffalo Bills), Sean McVay (Los Angeles Rams), and Kyle Shanahan (San Francisco 49ers) follow them with 9 years a piece.


