Zubov, 42, played 16 seasons in the NHL, winning the Stanley Cup with the New York Rangers in 1994 and the Dallas Stars in 1999. He played for the Rangers, Pittsburgh Penguins and Stars, finishing with 771 points in 1,068 regular-season games. He's one of five Russian-born players to skate in 1,000 NHL games, and he's the leading scorer among Russian-born defensemen. He had 117 points in 164 Stanley Cup Playoff games.
He also won an Olympic gold medal with the Unified Team in 1992.
"Sergei was a champion in the NHL and is well respected in our League and also in Europe," Blues general manager Doug Armstrong said. "We will rely heavily on his opinion and expertise as he monitors our European prospects."