Certification, Compliance and Consulting Engineers

Comprehensive Engineering Solutions in Christchurch, Timaru, Hamilton, Nelson and Dunedin

Our History

Design Engineering was established in 1991 when Managing Director Mr Dean Van Buuren was working in the tertiary sector and was being requested on a regular basis to assist with large projects for drawings, structural steel inspection and welding qualification testing. Realising a need in the industry, Design Engineering was launched and has quickly grown over the past 30 years to be a highly-respected industry leader.
In 2021 a major restructure was implemented due to Covid 19, a few bumps and the huge growth experienced over 29 years so the DE Group was formed, this includes 3 separate limited liability companies trading as the following entities:

DE Consulting Engineers & Inspection

Survey NZ

DE Calibration & Compliance 

The DE Group has a General Manager, Finance & Accounts Manager and a Quality Control Manager.
There are in excess of 35 staff across four branches within the 3 new entities located in: Christchurch, Timaru (Head Office), Te Rapa Hamilton, Nelson and Dunedin. 

Our team have worked on an array of high profile medium and large structural steel projects, including:
  • Sky Stadium Wellington
  • Indoor Stadium Christchurch
  • Remarkables Base Amenities Building Queenstown
  • ASB Don Street, Invercargill
  • 5 Mile Development Queenstown
  • St Albans School Christchurch
  • Holcim Timaru & Holcim Auckland - new cement facilities and loadouts.

We pride ourselves on the results achieved for these and many other projects.

Design Engineering machinery and equipment

There are 4 main areas DE Group specialises in





Equipment Inspections including Non Destructive Testing ensures our work is recognised world wide and our highly trained staff are suitably qualified to international requirements and experience to undertake their respective duties. Regular annual internal & external audits are carried out to ensure the DE Consulting Engineers & Inspection quality management system is maintained and functioning correctly and all staff remain competent in their respective duties.
DE Inspections have Mobile vehicles to enable all your equipment that requires testing and inspection to be completed on or off site with minimal disruption to you and enabling a fast and efficient turn around to get your equipment  back into service quickly. This service extends to out test lab facilities where you can courier or drop off equipment and get it tested then returned within a short period of time.

DE Chartered Professional Engineers, managed by Joe Calleja offer you a professional, efficient service in Timaru, and throughout New Zealand as well as overseas through our international clients. Our team of consulting engineers can undertake a wide range of structural & mechanical design and consent process (PS1) including industrial; residential and commercial buildings; foundations and retaining walls; seismic assessment and strengthening of existing buildings (ISA & DSA); construction monitoring (PS4); and peer reviews (PS2).

Design Engineering Vehicles

If you would like to find out more about our services, or you have an opportunity for Design Engineering to assist with your engineering service requirements on any given project, and/or require a free quotation, please contact us