dr geoff cashion

Dr Geoff Cashion

Dr Cashion was born in Brisbane and grew up in Rockhampton. After graduating in medicine from the University of Queensland in 2002 he spent many years working in emergency medicine and general practice. He completed training in No scalpel vasectomy under Dr Doug Stein in Florida with further training undertaken in Australia. He performs more than 70 vasectomies a week across Australia.

Dr Cashion is a Fellow of the Australian College of Rural and Remote Medicine (FACRRM) and the Royal College of Emergency Medicine (FRCEM), and is actively involved in teaching general practice registrars in his role as a General Practice Supervisor with James Cook University.

Geoff lives in Sydney with his wife and 2 daughters. Outside of medicine Geoff is a professional recording artist having released 2 albums and toured nationally. For more information visit www.geoffcashion.com.au



1992 Bachelor of Business. Queensland University of Technology​

2002 Bachelor of Medicine and Bachelor of Surgery. University of Queensland

2011 Fellowship – Australian College of Rural and Remote Medicine

2013 Fellowship – The Royal College of Emergency Medicine

2018 Graduate Certificate in Occupational Medicine. Otago University



“What Is The TCI Dose Required When Using Propofol For Conscious Sedation During Dental Procedures? : A Retrospective Study”

G Cashion, G Treston
The Internet Journal of Anesthesiology. 2014 Vol 34 N°1.

“What is the nature of the emergence phenomenon when using intravenous or intramuscular ketamine for paediatric procedural sedation?”

Treston G, Bell A, Carwell R, Fincher G, Chand D, Cashion G
Emergency Medicine Australasia (2009) 21, 315-322

dr Marcel Kalau

Dr Marcel Kalau

Dr Kalau completed his medical degree at the University of Notre Dame in Fremantle in 2011, and spent his first years working in emergency medicine and paediatrics in Western Australia. He completed his General Practice Fellowship in Melbourne in 2017 and his vasectomy training in 2018, which has since been his main focus, having performed over 2000 vasectomies in Melbourne, Canberra and Perth. Dr Kalau prides himself in his meticulous surgical technique and his caring and genuine interactions with his patients.

Dr Kalau also has an interest in global health equality having recently completed a Master of Global Health and Infectious Diseases Intelligence. He has worked in Geneva at the World Health Organisation on HIV prevention strategy, and in Papua New Guinea with the Australasian Society for HIV, Viral Hepatitis and Sexual Health Medicine.

Marcel lives in Melbourne where he also keeps busy renovating his house, hiking on weekends and down at St Kilda beach with his dog.



2004 Bachelor of Law and Bachelor of Science. The University of Western Australia

2011 Bachelor of Medicine and Bachelor of Surgery. The University of Notre Dame

2013 Diploma of Child Health. The University of New South Wales

2017 Fellowship of Royal Australia College of General Practitioners

2021 Master of Global Health and Master of Infectious Diseases Intelligence. The University of New South Wales

Dr Matthew Valentine

Dr Valentine completed his medical degree at the University of Adelaide in 2000.  Following a two year internship and residency at the Royal Adelaide Hospital Dr Valentine spent 5 years working full-time as a Medical Officer in the Royal Australian Air Force.  This included several overseas deployments and the coordination and conduct of aeromedical retrievals both overseas and within Australia.

Dr Valentine is a Fellow of the Royal Australian College of General Practitioners and holds the position of Designated Aviation Medical Examiner with the Civil Aviation Safety Authority.

Dr Valentine has been performing vasectomies in Brisbane since 2008, having initially trained in the traditional technique with Dr Greg Silver.  He has subsequently undergone further training in the USA, specialising in the No Scalpel Vasectomy Technique.  Having performed over 8000 vasectomies, Dr Valentine currently performs vasectomies in metropolitan Brisbane, regional Queensland, Gold Coast and Adelaide.

Dr Valentine is married and lives in Brisbane with his wife and daughter.  In his spare time he enjoys trail running, hiking and mountain biking.



2000 Bachelor of Medicine + Bachelor of Surgery​

2003 Designated Aviation Medical Examiner, CASA

2006 Fellowship of the Royal Australian College of General Practitioners