Dr Mullins graduated from the University of Sydney in 1982, and trained in clinical immunology and allergy at Royal Prince Alfred Hospital in Sydney. He was admitted to Fellowship of the Royal Australasian College of Physicians and Royal College of Pathologists of Australasia in 1989. He completed a PhD in the immunology of tuberculosis and leprosy of at the Centenary Institute for Cancer Medicine and Cell Biology in Sydney in 1991. He was appointed locum staff specialist in Clinical Immunology at the Royal Newcastle Hospital, prior to moving to London in  1992 to take up a Neil Hamilton Fairley NHMRC Post-Doctoral Research Fellowship. This was undertaken at the Kennedy Institute of Rheumatology & Charing Cross Hospital in London, studying autoimmune thyroid disease. He returned to Sydney in 1994. He worked in private practice in Canberra between 1995 and 202 at John James Medical Centre in Deakin, Canberra. He has studied and published on the epidemiology of food allergy and anaphylaxis in Australia, tracking increasing incidence over the last 29 years.

He has filled various committee roles in the Australasian Society of Clinical Immunology and Allergy (ASCIA) including as Newsletter Editor, Chair of the Clinical and Laboratory Practice Committee, Chair of the Education Committee 2000-2006 charged with developing patient educational material for the ASCIA web site, as President Elect 2007-8, as President 2008-2010 and Immediate Past President 2010-2012. He chaired ASCIA’s Anaphylaxis Committee (2013 to 2015), serves on other ASCIA committees and chaired the Board of the Allergy and Immunology Foundation of Australasia (AIFA 2014-2016), established to promote research into immune and allergic diseases in Australasia. He continues to serve on ASCIA committees.

He serves on the medical advisory board for Anaphylaxis Australia (previously known as FACTS), was series co-editor for the Medical Journal of Australia "Allergy Update" series published 2006 and co-authored the Access Economics-ASCIA Report on the Economics Cost of Allergic Disease in Australia in 2007. He serves as an external peer reviewer for a number of Australian and international medical publications.

He belongs to the following professional societies:

1. •Australian Medical Association (member)
   

2. •Royal Australasian College of Physicians (Fellow)
   

3. •Royal College of Pathologists of Australasia (Fellow)
   

4. •British Society for Allergy and Clinical Immunology (member)
   

5. •Australian Society for Clinical Immunology and Allergy (member)
   

6. •American Academy of Allergy, Asthma and Immunology (International Fellow)
   

7. •American College of Allergy, Asthma and Immunology (member)
   

8. •European Academy of Allergology and Clinical Immunology (member)
   

MAJOR PUBLICATIONS: see Google scholar link

https://scholar.google.com.au/citations?user=d9qoxaQAAAAJ&hl=en