[1] He was previously the offensive coordinator of the Jacksonville Sharks (2010) and Kansas City Brigade (2007),[2][3] teams in the Arena Football League, the head coach of the Spokane Shock (2006), the South Georgia Wildcats (2005), and the West Texas Desert Hawks (2024), and the Cape Fear Wildcats (2002–2004) and Arkansas Twisters of the af2.
While at Spokane, he led the first-year expansion team to a 14–2 regular season record and the ArenaCup Championship.
[3] On September 15, 2010,[4] he was named the first head coach of the expansion Pittsburgh Power of the Arena Football League.
The Desert Hawks were among three teams who moved from the NAL to a revival of the Arena Football League for the 2024 season.
Siegfried was fired from his coaching position June 9 without any public announcement, nine days before the Desert Hawks themselves quietly suspended operations.