CONTACT INFO. Czarnowski GmbH Schanzenstrasse 39 D4-D5 51063 Cologne, Germany +49 (0) 221.922321-0. Czarnowski North America 2287 South Blue Island Ave. Chicago, IL 60608 555 Dongchuan Road, Building #6, Rm 04, 1/F Shanghai, PR China 200241 +86 (0) 21.34713691. CAREERS. You’re one of us if you like to have fun while you’re working hard