Belfast | Society of Jesus | Royal Society | history | National Geographic Society | National Trust for Places of Historic Interest or Natural Beauty | American Museum of Natural History | Natural History Museum | History | American Cancer Society | History (U.S. TV channel) | natural history | Royal Television Society | Field Museum of Natural History | American Physical Society | natural gas | Natural environment | American Chemical Society | International Society for Krishna Consciousness | History of China | American Society of Civil Engineers | Royal Society of Canada | National Museum of Natural History | Royal Geographical Society | American Philosophical Society | Theosophical Society | Royal Society of Edinburgh | Society of Antiquaries of London | The History Channel | Society of the Cincinnati |
Workman was, as well as being actively involved in the civic administration of Belfast, the Honorary Librarian of the Belfast Natural History and Philosophical Society becoming president in 1898.