Philomena Mertens plays beach volleyball for SG Erfurt Electronic and competes in the federation “Thüringer Volleyball-Verband”.
Currently listed in TVV Jugend Frauen 2026 (rank 93, 18 points); TVV Erwachsene Frauen 2026 (rank 122, 13 points); TVV Erwachsene Mixed 2026 (rank 206, 5 points).