IWS Group - Stormwater, Wastewater Treatment & Solutions

IWS Team

The IWS team comprises a small group of consultants with engineering and science experience. A technician/electrician provides system support to, and generates monitoring data from, client sites. The team provides a wide skill base in the field of environmental solutions. Together, and with our associates, we offer a wealth of knowledge and experience to all projects we undertake.

Jim Maddock from Integrated Waste Solutions

Jim Maddock

Jim established IWS in 1994. Jim has worked in the waste and chemical industry for 20 years. He is experienced in industrial wastewater treatment and pollution prevention solutions, from investigation and the control concept through to system design and installation. Jim also has experience in wastewater monitoring, consent application, hazardous waste collection and treatment and technical sales.


Prior to this Jim worked for 10 years in the food industry in laboratory and production areas.

Jim holds a New Zealand certificate in Science and a Diploma in Dairy Technology from the Auckland University of Technology and Massey University respectively. Jim is a trained Environmental Auditor.

Mason Brown from Integrated Waste Solutions

Mason Brown

Mason is a mechanical engineer with 30 years experience in process, fabrication, petroleum and manufacturing industries in NZ. He most recently worked with Stainless Engineering Co Ltd on the manufacture of customised plant for food, beverage and waste industry clients.

Mason’s role is the management of IWS design and build projects, and the provision of engineering input to the Group.

Mason holds a New Zealand Certificate in Mechanical Engineering from Manukau Institute of Technology.

Tony Thompson from Integrated Waste Solutions

Tony Thompson

Tony is a scientist with experience in agriculture, ecology and regional government.

Tony’s role includes stormwater monitoring and interpretation, environmental auditing, Environmental Management Plan development and consent writing.

Tony holds a Bachelor of Agricultural Science from Massey University.

Since IWS commenced operations in 1994, cooperative arrangements with a range of specialists has evolved. When IWS does not have the in-house experience, other parties contribute to the project. These specialties include:

  • Structural engineering
  • Civil engineering
  • Air discharge engineering and consents
  • Surveying
  • Chemical and process engineering
  • Geologists and geotechnical engineering

Association Memberships

  • New Zealand Chemical Industry Council and Responsible Care program
  • New Zealand Water and Waste Association
  • Waste Management Institute of New Zealand
  • New Zealand Association of Resource Management (NZARM)

Company mission

To protect New Zealand’s environment by enabling industry to meet or exceed their requirements as governed by environmental legislation. This, in turn, promotes environmental sustainability.

Company values

We undertake our work with enthusiasm, excited by the search for practical and sustainable solutions for our clients. We conduct our business with integrity and honesty, and aspire to excellence in all we do.

Stormwater Solutions

Industrial Trade Waste Solutions

Pollution Prevention Solutions

IWS Group Stormwater & Wastewater Solutions Useful Links