Duffield was the natural choice for the first Director of the Commonwealth Solar Observatory – he had spent almost twenty years lobbying for its existence.
Don Mathewson was Stromlo’s first Australian Director since its founder Walter Geoffrey Duffield. Mathewson began his career in radio astronomy at the CSIRO in 1955, before moving to Manchester to complete his PhD
Mount Stromlo’s fifth Director, Olin Eggen, was a ‘scientific nomad’ who worked in Observatories in the United States, England, South Africa, Australia and Chile over his illustrious career.
Bill Rimmer, ex-engineer and WWI captain, led the Commonwealth Solar Observatory during the 1930s, overseeing the Heliostat's construction amidst financial challenges.