John was Editor-in-Chief of the Journal of Bone and Mineral Research, is a past member of the Board of the International Bone and Mineral Society and of the Council of the American Society for Bone and Mineral Research. He is a co-founder and past President of the Australia and New Zealand Bone and Mineral Society.

John chaired the inaugural Australian National Health Priority Action Council’s National Arthritis and Musculoskeletal Conditions Advisory Group and co-chaired its successor, the Australian Better Arthritis and Osteoporosis Expert Advisory Committee. He is currently co-chair of the NSW Health Agency for Clinical Innovation in Musculoskeletal conditions and chair of the American Society for Bone and Mineral Research (ASBMR) International Task Force on Osteoporotic Fracture.

The focus of John’s research is the epidemiology and genetics of osteoporosis, encompassing population, family and twin studies as well as molecular and cellular mechanisms for gene effects. His major commitment and focus is translating osteoporosis research findings to real improvements in health care delivery to the general community through the education of patients and their doctors.