 In May 2007, Klimowicz moved to fellow league side Borussia Dortmund on a two-year deal.On 25 August, his brace was crucial to the hosts' 3–0 home defeat of FC Energie Cottbus; he added four goals in their runner-up run in the DFB-Pokal, being booked as a second-half substitute in the decisive match, lost 1–2 to FC Bayern Munich after extra time.In the 2008–09 winter transfer window, Klimowicz signed with VfL Bochum.