Question: What position does Bob Diaco hold with the football team hat has the most wins and the highest winning percentage of any program over the last 50 years?
Related documents: [0]  [DOC] The Nebraska Cornhuskers football team represents the University of Nebraska–Lincoln. Among the 128 Division I-A teams, Nebraska is one of ten football programs to win 800 or more games. Nebraska has more victories against Power Five opponents than any other program, as well as the third most victories all-time, behind only Michigan and Texas. Nebraska also has the most wins and the highest winning percentage of any program over the last 50 years. Two of Nebraska's national championship-winning teams, the 1971 and 1995 teams, are considered to be among the best college football has ever seen. [END] 
[1]  [DOC] Robert Albert Diaco (born February 19, 1973) is an American football coach and former player. He is currently the defensive coordinator at Nebraska. He previously was the head coach of the Connecticut Huskies football team. Prior to coaching at Connecticut, he has been a coach at Western Illinois, Eastern Michigan, Central Michigan, Virginia, Cincinnati, and Notre Dame. He played college football at Iowa. [END] 
Answer: 
defensive coordinator
defensive coordinator