Overall record: 143-169-28 (through 2012)
Hadzic has helmed the Mount Mercy men's soccer program for 18 seasons and is the program's all-time leader in coaching victories. He reached the 100-win plateau in 2009 and was the 1999 Midwest Classic Conference Coach of the Year after the Mustangs won 14 games and advanced to the NAIA Region VII Final Four. In the fall of 2010, he picked up his second MCC Coach of the Year award after the Mustangs set a school record with 15 wins. Hadzic made it back-to-back honors when he was again named MCC Coach of the Year in 2011 after Mount Mercy claimed the regular season and MCC Tournament titles and reached the NAIA national tournament for the first time in school history.
In addition to his duties as Mount Mercy's head coach, Hadzic is head boys' soccer coach at Cedar Rapids Xavier High School, where he led the Saints to the 2010, 2011 and 2013 Iowa Class 2A state championships. He is a five-time Metro Coach of the Year (2000 and 2003 at C.R. Prairie; 2007, 2010 and 2011 at C.R. Xavier) and the 2010 and 2011 Mississippi Valley Conference Coach of the Year. Hadzic was also awarded the 2010, 2011 and 2013 Iowa High School Athletic Association's Coach's Achievement Award. In the summer of 2010, he was also named the National Soccer Coaches Association of America (NSCAA) Iowa High School Coach of the Year. In 2011, Hadzic earned the National Federation of State High School Associations Coach of the Year for the State of Iowa. In 2013, he was selected to coach the east all-stars at the annual Iowa High School Coaches Association All-Star Game.
Hadzic has also contributed greatly to the growth of soccer in eastern Iowa through the support and development of several soccer programs. Hadzic's ability to mentor and engage his student-athletes has led many to contribute their skills within their communities. Seventeen of Hadzic's Mount Mercy players have become head coaches throughout the country, including seven in the Cedar Rapids and Iowa City area.