Real Salt Lake On May 3, 2007, Kreis retired from professional competition and was announced as the new head coach of
Real Salt Lake, retiring as a player and taking over the coaching reins from
John Ellinger. At the time of his hire, Kreis became the youngest active head coach in MLS at 34 years and 127 days. He led Real Salt Lake to its first-post season playoff appearance in 2008 and in 2009 he coached the team to its first
MLS Cup championship. Kreis is the youngest coach in MLS history to win the MLS Cup. Following the
2009 MLS Cup win, Kreis would lead Real Salt Lake to playoff appearances in every subsequent season through 2013, including an appearance in the
2013 MLS Cup, which RSL lost to
Sporting Kansas City in dramatic fashion on penalty kicks. Kreis also guided Real Salt Lake to a very good
CONCACAF Champions League campaign in 2011. Real Salt Lake won Group A and made it all the way to the
2011 CONCACAF Champions League Finals, only to lose to 3–2 on aggregate to
C.F. Monterrey. Real Salt Lake signed Kreis to a contract extension on March 24, 2011, that kept him at the RSL helm through the 2013 season, after which he left RSL to become head coach of
New York City FC. Real Salt Lake originally retired Kreis' number 9 jersey from his playing days, but has since reinstated the number with his permission.
New York City On December 11, 2013, Kreis was announced as the first head coach of
New York City FC, having reached the end of his contract at
Real Salt Lake and declining an extension offer from RSL so he could take the New York City FC position. The move came just four days after he missed out on lifting his second
MLS Cup with the
Utah team, losing on penalty kicks to
Sporting Kansas City. It was revealed in the announcement that his contract, starting on January 1, 2014, would see him begin by traveling to
Manchester in England to familiarize himself with the set-up of franchise-owners
Manchester City.
Orlando City On July 19, 2016, Kreis was hired by
Orlando City to replace outgoing inaugural coach
Adrian Heath. At Orlando City, he reunited with two of his assistant coaches,
Miles Joseph and
C. J. Brown, On June 15, 2018, Kreis was released by Orlando City.
United States U-23 On March 19, 2019, Kreis was named head coach of the
United States men's national under-23 team.
Fort Lauderdale On February 15, 2020, Kreis was hired by
Inter Miami, to coach their
USL League One affiliate
Fort Lauderdale.
Inter Miami On March 1, 2021, Inter Miami announced that Kreis was to become an assistant coach under
Phil Neville. On June 1, 2023, the club announced that it had parted ways with Neville, with Kreis also relieved of his duties. == Front office career ==