From the 2014–15 season, Kohfeldt worked as assistant manager of Bremen, under head coach Viktor Skrypnyk.

On 2 October 2016, it was announced that Kohfeldt would become head coach of Werder Bremen II, effective as of the following day.

[3][4] Kohfeldt was appointed interim manager of Werder Bremen on 30 October 2017 following Alexander Nouri's dismissal.

[10] On 26 October 2021, Kohfeldt was appointed manager of VfL Wolfsburg, signing a two-year contract.

[13] Kohfeldt has a Master of Arts in public health,[14] and a football instructor license of the DFB.