David Karkossa plays beach volleyball for SG HeideVolleys and competes in the federation “Nordwestdeutscher Volleyball-Verband”.
Currently listed in NWVV U18 männlich (E) 2026 (rank 127, 48 points); NWVV U19 männlich 2026 (rank 179, 48 points); NWVV Erwachsene Männer 2026 (rank 966, 48 points).