Patrick Kron, chairman and CEO of Alstom, paid tribute to Mellier's achievements at Alstom since he joined in May 2003.
"Philippe Mellier has developed Alstom Transport's positions in a number of markets and product lines," Kron says. "He has notably built a major partnership in Russia [which is] very promising for the future of Alstom Transport."
Kron will act as president of Alstom Transport until a replacement is announced.