Hansen was an assistant coach under his father at Palo Alto High for four seasons (2004–07), working primarily with tight ends and defensive ends. He also served as the team's defensive coordinator during the 2006 and 2007 seasons.[1]
in 2008, Hansen was a strength-and-conditioning intern for the Stanford Cardinal football team. He was promoted to defensive assistant at Stanford in 2009. When Stanford defensive coordinator Vic Fangio moved to the San Francisco 49ers with head coach Jim Harbaugh, Hansen was hired as defensive assistant/quality control coach for the 49ers.[1] Hansen worked with film breakdown, scouting reports and practice preparation.[1]
In January 2014, Hansen returned to Stanford as inside linebackers coach.[2]
On January 21, 2020, Hansen was announced as the new defensive coordinator on Marcus Arroyo's inaugural staff at UNLV.[3] Following two seasons at UNLV, Hansen was hired as the linebackers coach for the Denver Broncos in 2022.[4] Hansen was not retained by the Broncos for 2023 after Sean Payton was hired as head coach.[5]
On February 8, 2023, the Carolina Panthers hired Hansen as their linebackers coach.[6]