Maier became Wimbledon champion in the mixed doubles in 1932 when, partnered with Elizabeth Ryan, they defeated Harry Hopman and Josane Sigart in straight sets.

In that same year he also reached the quarterfinals of the singles championship, beating Frenchman Jean Borotra along the way, and losing to eventual champion Ellsworth Vines.

In 1935 he competed in the mixed doubles competition at the U.S. National Championships held at the Longwood Cricket Club (Boston, Massachusetts) together with the American Sarah Palfrey.

They won the title by beating the Czechoslovakian-British pair Roderick Menzel / Kay Stammers in three sets.

[2] He was the son of Otto Maier who played for FC Barcelona, and his wife, Anna Elizabeth Müller.