In 1896, Grunsky implemented the innovative gravity-based sewer channeling waste rapidly from North Point to Golden Gate or towards Oakland.
He served as member on the Board of Trustees from 1898 to 1904 at the California Academy of Sciences where in 1911 he was promoted to secretary and was elected president in 1912.
After starting his first career as a city engineer of San Francisco, from 1900 to 1904, and gaining recognition, he consequently became a member of the Panama Canal Commission from 1904 to 1905.
Political science, particularly those phases dealing with rates, taxation and forms of money, fascinated him and he published extensively on the subject .
He was always interested in art and during his later years found time to paint some backgrounds of the habitat groups of African animals now being installed by the academy.