After receiving his guide’s license in 1907, Rudolph Aemmer left Switzerland for Canada in 1909. He enjoyed a long career, retiring in 1949 at the age of 65. Together with Edward Feuz jr., he led the first party to the summit of Mount Sir Sanford.
Aemmer was highly respected. Following his dramatic rescue of Mrs. Stone on Eon Mountain he was awarded a special citation by the American Alpine Club. His response was, “Real guides cannot be heroes. When somebody gets into trouble in the mountains, we go after him, take the necessary risks, and bring him down. Nothing else counts." He remained in Canada until his retirement in 1950 when he returned to Switzerland where he died at the age of ninety.