Reiswerg attended Indiana University where he was a goalkeeper on the Hoosiers soccer team from 1999 to 2002. He was a member of Indiana University's 1999 NCAA National Championship team, as well as a part of three IU squads that advanced to the College Cup Final Four. Additionally, the Hoosiers captured four Big Ten regular season titles and two Big Ten Tournament championships during his playing career. Reiswerg was a 4-time Alpha Beta Academic Award honoree during his career.
Professional
In April 2003, Reiswerg signed a professional contract with the Cincinnati Riverhawks of the USL A-League, the second-highest professional league in the U.S., below MLS. Reiswerg appeared in 6 games that season for the Riverhawks, starting 5. He made his professional debut for Cincinnati on May 2, 2003 when he came on as a substitute in the Riverhawks' 3-0 victory over the Indiana Blast. In his first professional start, Reiswerg recorded 12 saves in a 3-0 shutout victory over the El Paso Patriots on May 10. For his efforts, Reiswerg was named to the USL A-League Team of the Week. Reiswerg would go on to win his second start against the Blast, 2-1, in his home city of Indianapolis, on May 16. Reiswerg also started the Riverhawks 2nd round U.S. Open Cup match against the Minnesota Thunder, a 2-1 overtime defeat. In July 2003, Reiswerg left the Riverhawks and signed with his hometown Indiana Blast. He started 2 matches for the Blast in 2003. In the final game of the 2003 season- which would be the Blast's final match as an A-League professional franchise- Reiswerg started in goal and shutout the defending league champions and 2003 regular season champions, Milwaukee Wave for 45 minutes before being substituted.
International
Reiswerg represented the United States as the starting goalkeeper for three international Maccabiah competitions, culminating in the 2005 Maccabiah Games in Israel. At the 2005 games, Reiswerg recorded shutouts in 3 of his first 4 games, which included a penalty shootout victory over Mexico in the semifinals following a 0-0 draw. After blanking Mexico for 120 minutes, Reiswerg saved a potentially game-winning penalty kick on Mexico's 5th spot-kick. Then in sudden-death penalties, he again made a save and then watched his team convert their attempt to seal the victory. The dramatic win advanced the Americans to the tournament final vs. Israel. The United States team lost 2-0 to Israel's U-20 National Team in the final, and won the Silver Medal.
Coaching and Administration
Reiswerg was an Assistant Coach for the IUPUI Jaguars men's soccer team for five seasons, from 2006-2010. His primary duty was training the goalkeepers. The Jaguars advanced to the Summit League tournament in each of his 5 seasons at IUPUI and were finalists in 2007. The 2009 and 2010 seasons were banner years for IUPUI's goalkeepers. Under Reiswerg's watch in 2009, the team's goalkeepers posted the lowest team goals against average, and highest save percentage since IUPUI's NCAA Tournament team in 2000. And in 2010, the Jaguars keepers bested their 2009 goals against average- recording a combined 1.06 GAA. In 2012 Reiswerg assisted Coach Shek Borkowski on the staff of the Haitian Women's National Team, and oversaw the training for the goalkeepers during their residency in Lafayette, Indiana. He continues to work with the team when they are in the United States, and assist in their efforts to qualify for the 2015 FIFA Women's World Cup. In November 2012, Reiswerg was hired as the Director of Operations and Marketing for the United Soccer Alliance of Indiana- the state's largest youth soccer organization. He served the club in an administrative role and managed all aspects of club operations and marketing. Reiswerg was hired by U.S. Soccer in March, 2015 to join the staff of the U.S. Soccer Development Academy- a program that provides education, resources and support to impact everyday club environments that will develop world-class players. His primary duties include overseeing all aspects of Development Academy league scheduling and operations, as well as collaborating to execute all Development Academy Showcases and Championship events.