Tree Wise Men


Tree Wise Men® Australia Pty Ltd has two Directors and a staff of Consulting Arborists and Landscape Architects.  The team is tertiary qualified and highly experienced in their particular fields.

Peter Castor

Peter has over 30 years professional experience as a Consulting Arborist. Peter was educated in Australia with a BSc (Forestry) from ANU, Canberra and a Certificate in Horticulture from Ryde College of TAFE.

Peter is a Director of Tree Wise Men® Australia Pty Ltd. He has experience in both public and private sector projects, preparing comprehensive analysis of amenity tree problems. Peter has the role of senior Arborist on all projects and is also involved in mentoring junior, arboricultural staff.

For the past two decades Peter Castor has successfully provided Expert Witness testimony in the NSW Land and Environment Court, Supreme and Local Courts as well as having been retained as an Expert in the Court of Arbitration, Hong Kong. Peter has been admitted to the prestigious UK based, Academy of Experts as an Expert Witness for international projects.

More recently Peter has attained Quantified Tree Risk Assessment (QTRA) and Tree Risk Assessment Qualification (TRAQ) accreditation.

Peter is a member of the Planning Institute of Australia (Environmental Chapter) and is vice president of the Institute of Australian Consulting Arboriculturists (IACA). Peter has been a participant in Planning Institute of Australia study tours of Scandinavia and China, as an Environmental Chapter representative and has recently undertaken arboricultural study in Chile and the United Kingdom.

Bronwen Castor

Bronwen has over 30 years experience as a social and marketing researcher. Bronwen was educated in Australia and holds a BA from ANU, Canberra, a Certificate of Commercial Mediation and a Certificate in TESOL from the Institute of Languages (UNSW). She has worked in both the public and private sectors providing informed advice on issues and their social impact. Bronwen has also undertaken monitoring and evaluation programs for commercial and not for profit sectors and is particularly interested in social and planning issues in south east Asia and the Pacific.

As a Director of Tree Wise Men® Australia Pty Ltd, Bronwen brings a pragmatic, insightful approach to all arboricultural and social impact projects undertaken by the company. Bronwen is the Principal of Bronwen Castor & Associates, a division of Tree Wise Men® Australia Pty Ltd.

Bronwen is a member of the Australian Market and Social Research Association, Planning Institute of Australia (Social Planning Chapter), Institute of Company Directors, Australian Dispute Resolution Association and more recently the Australasian Evaluation Society Inc.

Bronwen has been a participant in Planning Institute of Australia study tours of Scandinavia and China as a Social Planning Chapter representative. On declaration of independence, Bronwen was also involved in the PIA Working Group to East Timor.

The Directors and staff at Tree Wise Men® Australia Pty Ltd are committed to on-going professional development as well as collegiate exchange of ideas.  This is demonstrated in the extent to which membership of key professional organisations is held.

Professional Memberships

  • Institute of Australian Consulting Arboriculturists (IACA)
  • Arboriculture Australia (AA)
  • Planning Institute of Australia (PIA)
  • Australian Market and Social Research Society (AMSRS)
  • Urban Design Institute of Australia (UDIA)
  • Academy of Experts UK (AE)
  • Australian Disputes Resolution Association (ADRA)
  • Australasian Evaluation Society Inc
  • ‪International Society of Arboriculture (ISA)‬
  • Institute of Company Directors