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Donald
J. Donald R. de Raadt is a social scientist who has held academic posts in Australia, the United States, and Sweden, where he served for twelve years as Professor of Informatics and Systems Science at Luleå Technical University. He has also been President of the International Society for the Systems Sciences (USA), President of the Swedish Operational Research Society, and Vice-President of the International Federation for Systems Research in Vienna.
After retiring from university life, he and his wife Veronica founded the Melbourne Centre for Community Development, dedicated to promoting family and community through research, publications, and seminars. All its services are offered without charge. His research has focused on designing university programmes, both undergraduate and postgraduate, that place science in the service of family and community.
The Centre now conducts a doctoral programme in Brazil, where for two decades Donald, with Veronica’s support, has mentored systems scientists of the Brazilian chapter of the International Society for the Systems Sciences. He also guides a Brazilian research group committed to multidisciplinary, systemic, and multimodal research, and serves as Honorary Mentor of the Multimodal Systems Group at the Catholic University of Argentina in Rosario.


Veronica D. de Raadt trained as a social worker in Australia and, after completing a master’s degree in the United States, worked in the fields of domestic violence and mental health. To broaden her expertise in the human services, she pursued doctoral studies in Sweden, focusing on human factors in community development in remote communities. The results of this research were later published in her book Ethics and Sustainable Community Design.
In Sweden she also taught psychology, sociology, and research methods at Luleå Technical University and contributed to EU-funded community development projects. Together with her husband Donald, she founded the Institute for Management and Social Systems in Sweden, which now continues in Australia as the Melbourne Centre for Community Development. Her research has appeared in leading systems journals and has been presented at international conferences across Europe and the United States.

Sue-Lee Seng (Bachelor of Architecture; Graduate Diploma in Community Development) worked as an architect from 2004 to 2011. Since 2007 she has been active as a volunteer in Melbourne, teaching children from inner-city public housing estates, helping them grow in moral principles within a positive and supportive environment. In 2009 she joined a team of volunteers in China assisting local farmers with the potato harvest, and in 2007 she worked with a not-for-profit architectural organisation in the Solomon Islands to construct latrines after the devastation of a tsunami.
In 2011 she founded RIAH, a community-based hairstyling business that both provides income and raises awareness of social needs within her networks. She now serves as a children’s pastor and community developer in Melbourne.


Breno Oliveira Perdigão is a civil engineer with professional experience in industrial planning and renewable energy projects. He received his doctorate from the Melbourne Centre for Community Development, completing his research in the Doctoral Programme in Multimodal Systems Research with a thesis entitled “Community Sustainability: Application of Multimodal Systems Thinking in a Neighbourhood in Brazil.”
He now serves on the Centre’s teaching staff in Brazil, contributing to projects that support local development and apply systemic approaches in community settings. Alongside his family, he is also engaged in family farming, developing research and practices in food and vocational care aimed at strengthening communities and advancing local sustainability.
Ester
Ester Wolff Loitzenbauer is an oceanographer with a PhD in water resources and environmental sanitation. She is a professor at the State University of Rio Grande do Sul (UERGS) in Brazil and is involved in education and research in water management and river basin committees. She is also engaged in in postgraduate studies in multimodal systems research at the Melbourne Centre for Community Development.