Bach won a dozen medals at the ICF Canoe Sprint World Championships with six golds (K-4 500 m: 1998, 1999; K-4 1000 m: 1997, 1998, 2001, 2005), four silvers (K-4 200 m: 2005, K-4 500 m: 1997, K-4 1000 m: 1999, 2002), and two bronzes (K-4 200 m: 1997, K-4 1000 m: 2003).