Tony has worked as a hydrologist and engineer specializing in water and sanitation projects, particularly on islands in the Pacific and Indian Ocean over the past 45 years.  Most of his work has been related to groundwater resources assessment and management of small coral sand and limestone islands in Kiribati, Tonga, Cook Islands, Federated States of Micronesia, Nauru, and Maldives. 

He has also worked on water resources management projects involving surface water, rainwater, and desalination in other Pacific Islands countries.