Siegfried Hekimi (born 5 September 1956) is a Swiss former professional racing cyclist and a professor in the Biology Department of McGill University, specializing in the study of aging.

He rode in the 1982 Tour de France. After his cycling career, Hekimi obtained a Ph.D. in neurobiology at the University of Geneva.

Hekimi was born in Zürich, on 5 September 1956. He became a full professor in 2004 at McGill University and his research has extended to include mouse models of aging and of age-dependent diseases.