For nearly 100 years, Stevenson has played a major role in developing New Zealand’s roading and infrastructure. We are a major player in the country’s construction industry, supplying aggregates and a very wide range of concrete-based building products. We have strong roots in land-based businesses including mining and quarry management, agriculture and property. We are a trusted provider of engineering and related services among the industries we work in.


Jayden Ellis
Stevenson Laboratory Manager

Jayden has been Laboratory Manager since 2003 after having joined Stevenson in 1992, initially as a trainee laboratory technician. Under his management the laboratory has expanded its work for external clients and gained a reputation for quality and reliable testing and innovative product design solutions.

He is responsible for ensuring the fast turnaround bulk testing of aggregates, concrete, masonry, paving and soils for both external and internal customers and for backing up reports with technical expertise and advice. His other responsibility is to train staff and plan their career development.

Jayden is a registered technical expert for IANZ (International Accreditation New Zealand) in the area of aggregate, soils, concrete and masonry paving.