When Yesterday’s Trash Becomes Tomorrow’s Crisis

Paul Walker is a Technical Director for Tonkin + Taylor’s Contaminated Land services, based in Christchurch, New Zealand. He has over 27 years’ experience in contaminated land assessment and remediation, 20 years of which have been in Aotearoa, New Zealand.  Over recent years Paul has acted as Project Manager or Project Director for the multi-disciplinary assessment and remediation of numerous coastal landfills, for the development of a national tool to assess landfill vulnerability to climate change related natural hazards, and for the development of a tool to assist in the long-term financial planning of closed landfill management for a major City Council.  Paul is a Certified Environmental Practitioner (CEnvP) as certified by the Environmental Institute of Australia and New Zealand (EIANZ).

Andrew is an experienced environmental scientist with over 17 years of consulting experience, specialising in landfill design, construction, closure, and aftercare. Based in Melbourne, Australia, Andrew has worked extensively across Australia. He has extensive expertise in landfill gas, groundwater, surface water, and contaminated land investigations. He has led multidisciplinary teams, managed complex environmental assessments, and provided expert input on regulatory compliance, risk management, and site remediation.

Andrew is a regular presenter at industry seminars and has served as an expert witness in environmental matters. With a commitment to independent, evidence-based practice, he brings a wealth of practical insight to discussions on sustainable waste management and environmental protection.