Terry has worked for over 30 years to promote good mental health across the public sector, not-for-profit and non-government sectors as well as in private practice.  He has also worked on a number of programs to promote mental and physical health with a number of remote Aboriginal communities in Arnhem Land N.T. Terry has developed, implemented clinical support programs for firefighters and emergency service personnel in NSW. He also developed and coordinated a number of community based anxiety and depression programs while the Deputy CEO of the NSW Mental Health Association. Terry is currently in a second term appointment by the NSW Minister of Health to the Official Visitor Program under the Mental Health Act (2007). He has supervised student postgraduate research and people working toward professional registration.

Terry has had broad research experience and has participated in a number of projects funded by the Australian Research Council and other independent bodies including adaptive training for emergency service personnel; human behavior in disaster situations as part of the Bushfire CRC; managing the impact of trauma and vicarious trauma on emergency service personnel to promote resilience and better long term outcomes and trials of community based programs for e-mental health.