Australian National Chapter

The IAH Australia National Executive (President, Vice-President, Treasurer, and Secretary) is elected annually from IAH members in good standing. The National Executive for the 2019 membership year was elected at the IAH Australia AGM held in Sydney in February 2019, in conjunction with the NSW Branch AGM and technical meeting.

A member sponsorship scheme run by the Australian Chapter pays for a number of hydrogeologists in developing countries of the Asia-Pacific region to become full members of the IAH.


President: Dr. Ian Brandes de Roos

Vice-President: Greg Hoxley

Treasurer: Ron Colman

Secretary: Claire Kent

Past President: Dr. Lange Jorstad


Dr Ian Brandes de Roos (WA)

Dr Ian Brandes de Roos is a Principal Hydrogeologist with Rockwater in Perth.

Ian has over 15 years of experience in the Australian groundwater industry and has developed specialist expertise in water supply projects, environmental impact assessments, and MAR and geothermal projects. Ian has previously been the Vice President, and Chairperson of IAH WA.


Greg Hoxley (VIC)

Greg Hoxley is a Principal Hydrogeologist with Jacobs in Melbourne.


Ron Colman (WA)

Ron is a hydrogeologist with extensive experience in water supply development and water resource management throughout Western Australia and the Northern Territory for mining, municipal, commercial, horticultural and industrial clients. Overseas experience includes groundwater investigation and water supply development work in Peninsula and East Malaysia (Sabah), Kalimantan (BHP Minerals Indonesia) and Orissa, India (Indo-Australian Aid Project).

Ron has been a member of IAH since 1984 and has been a WA Branch committee member for a large portion of that time. He has filled the roles of Branch Chairman, Vice Chairman and meetings organiser.


Claire Kent (QLD)

Claire is a Senior Hydrogeologist with Klohn Crippen Berger in Brisbane. Originally from the UK, Claire has 9 years experience as a consultant hydrogeologist in Australia, Papua New Guinea and the UK, working across a range of projects from water supply, mining, coal seam gas and water resource management.


Dr. Lange Jorstad (NSW)

Lange is a Principal Hydrogeologist with Geosyntec in Sydney, with 20 years’ experience in the fields of physical and contaminant hydrogeology. Lange is originally from California, and migrated to Australia in 2000 as a PhD student at the University of New South Wales. Lange has been involved with IAH Australia in state and national committee positions since 2006, including eight years on the National Committee and two years as President of IAH Australia. Lange has a keen interest in promoting the IAH values of education, advocacy, collaboration, training and profile raising for the groundwater community in Australia. In his spare time he likes to take long walks in the wilderness, and shuttling three kids around their very busy lives!