Krämer was a rather unknown coach in German regional football, when, at the age of 44, he became the assistant manager of Arminia Bielefeld.

Thus, he had become very popular in Bielefeld and developed a high identification with the club (including a huge tattoo on his chest).

[1] From September 2013 onwards, Arminia played a very weak season, so that Krämer was dismissed in February 2014.

[2] Also in Cottbus he was complimented for his high commitment but had to leave because the weak beginning of his second season there.

[12] In early June 2021, Krämer became the new head coach of Belgian Jupiler Pro League team Eupen.