Han Wahjudi is the Principal Ecologist, Urban Planner and Director of Galaxia. He is responsible for the operations of sustainable development consultancies throughout Australia and Asia, delivering a diverse portfolio of 100+ environmental projects, including sustainable infrastructure with a total construction cost exceeding USD180M. He is a PhD candidate at the University of Melbourne and is a regular presenter of freshwater ecology and management case studies at international conferences.

He has been responsible for the total setup, operations and sales of environmental consulting services throughout 6 countries; Australia, Singapore, Indonesia, Malaysia, Vietnam and China. His portfolio includes successful delivery of environmental targets in urban developments ranging up to 500 ha. His international network of developers, consultants and scientists throughout Asia and Australia allows him to service large scale urban development with the most effective teams throughout the region.

With extensive expertise in project management and water resources, including freshwater ecology and water sensitive urban design, some examples of his work can be found on Our Work page.

We Thrive On Challenging Projects.

Meet the teams we work with

Australian National University
ANU is a research-intensive university of global standing specialising in discovery and public policy. It consistently ranks amongst the great universities of the world. Its research priorities address the challenges facing Australia and the world.
Geographical Information Systems 50%
Fieldwork and analysis of data 50%
The University of Melbourne
Established in 1853, the University of Melbourne is a public-spirited institution that makes distinctive contributions to society in research, learning and teaching and engagement. It’s consistently ranked among the leading universities in the world. Geography has been taught at the University for more than 50 years. Areas of world-leading research strength include international development, urbanisation, biogeography and earth surface processes, with an overarching interest in environment and environmental change.
Freshwater Ecology 80%
Technical Review 20%
Monash University
Named after engineer, military leader and public administrator Sir John Monash, Monash University was established by an Act of Parliament in 1958. A global university with a presence on four continents, we have seen the good achieved by Monash people in areas like green chemistry, sustainability, and accident and trauma.
Freshwater Ecology 80%
Technical Review 20%
Dalton Consulting Engineers
Dalton Consulting Engineers (DCE) is a civil engineering consultancy based in Victoria and Queensland, Australia. With three core areas of expertise; urban development, infrastructure and sport, DCE has fast become one of the most recognisable firms in the provision of innovative design and project management.
Sustainable Infrastructure 60%
Project Management 20%
Publications and Presentations 20%
Hainal-Konyi Group
Founded in 1937 by Dr K Hainal-Konyi, an eminent European Engineer and Researcher, Hainal-Konyi & Partners began as pioneers in the use of new materials and techniques and in its 70+ years in existence, the partnership has completed several hundred projects in Europe.
The Asian branch was established in 1981 with the opening of an office in Singapore, regional expansion quickly followed with new offices in the region including Vietnam, Malaysia and China.
Civil Engineering 50%
Structural Engineering 30%
Architecture 20%
Signature Property Group
Signature Property Consulting is the managing body for an outstanding group of professionals specializing in Architecture, Engineering, Environmental Management and Project Management
When you need a property consultancy company with unrivalled experience, a company with over 700 successful projects across Australasia and a company driven by results, Signature Property Consulting is the answer.
Property Development 50%
Asset Management 30%
International Outreach 20%
Kingfisher Consultants
Kingfisher Consultants comprises of the partnership between Dr. Jill Lancaster and Dr. Barbara Downes. With over 50+ years of experience providing practical advice on environmental impacts and environmental monitoring, 120+ publications in the peer-reviewed scientific literature and academic positions held at the University of Melbourne, University of Edinburgh and Monash University, Kingfisher Consultants provides world-class ecological expertise of all freshwater ecosystems.
Ecological Assesment 50%
Environmental Management 50%

We Are Global And Have Helped Clients Worldwide.