Beard studied at the University of Oxford where he completed his doctoral thesis on tropical forestry.
While working with the Forestry Division in Trinidad and Tobago during the 1940s, Beard developed a system of forest classification for Tropical America and described the forests of Trinidad, Tobago, and the Lesser Antilles;[1][2] these descriptions remain standard references on the topics.
After leaving Trinidad, Beard moved to South Africa and then to Australia, where he produced an extensive series of vegetation maps covering much of the country.
His extensive surveys of Western Australia set standards for understanding regional floristic zones and biogeographical areas for the whole state.
He was the main author of the 1964–1981 explanatory notes to the mapping project of the Vegetation Survey of Western Australia, which involved travelling some 150,000 kilometres.