South Dakota State co-defensive coordinator and linebackers coach Jay Bubak has resigned after nine seasons to pursue other interests outside of coaching.

Bubak was the longest-tenured assistant on head coach John Stiegelmeier’s staff, joining the Jackrabbits in 2005 as defensive coordinator and linebackers coach. From 2007-10 he coached the defensive backs before returning to coach the linebackers in 2011.

In a SDSU press release, Stiegelmeier said:

It’s a major loss to our coaching staff.

Jay was truly a difference maker for SDSU and Jackrabbit football.

He did a great job in every phase — coaching, recruiting and mentoring.

South Dakota State made the playoffs in two different seasons while Bubak was on the staff, 2009 and last season.

In 2009, SDSU finished fourth in the nation in pass efficiency defense, 14th in rushing defense, 16th in scoring defense, and 17th in total defense.

In 2012, the Jacks were 4th in the FCS pass efficiency defense, 5th in scoring defense, and 8th in total defense.

South Dakota State opens the 2013 season Saturday, August 31st, when they host Butler.