 He served as linebackers coach in 2004 and 2005 for the Kansas State Wildcats under head coach Bill Snyder, before returning to Maryland as their defensive coordinator and linebackers coach with head coach Ralph Friedgen.While at Maryland, Cosh was frequently criticized by fans for the inconsistent performance by Maryland's defense, which was described as "poor to occasionally impressive".Friedgen praised Cosh's recruiting but showed public frustration with Cosh's in-game coaching.