Stuttgart have secured a deal for Thorsten Kirschbaum, who will join them in the summer on a Bosman transfer.
The 25-year-old is to replace veteran Marc Ziegler as back-up goalkeeper at Mercedes-Benz-Arena.
Kirschbaum has signed a three-year-deal at Stuttgart until June 2016.
Stuttgart general manager Fredi Bobic said: "We are happy to have signed Thorsten Kirschbaum for Stuttgart.
"Thorsten Kirschbaum has gone through a great sort of progress at Energie Cottbus. He is the first-team regular there and picked up valuable experiences. We feel he is a talented goalkeeper."