Tom Landry is the longest tenured coach in NFL history as he coached the Dallas Cowboys from 1960 until 1988. Jeff Fisher is the longest tenured head coach still in the league. He has coached the Tennessee Titans since 1994.
The longest tenured coach in NFL history was Tom Landry, who coached the Cowboys from 1960 to 1988 for a total of 29 years. The second longest tenured coach was Don Shula who coached the Dolphins from 1970 to 1995 for a total of 26 years.
Know someone with in the organization of which you want to coach.
Tom Landry - Dallas 29 Seasons
Jeff fisher of the titans then Andy reid of the eagles
Wade Phillips, currently the coach of the Dallas Cowboys, has lead 4 teams to the NFL playoffs in his 31-year coaching career.
Bill Parcells was an NFL head coach (American football).
Marty Schottenheimer did not coach an NFL team in the 2007 season.