Opus Stewart Weir is an established engineering, environmental & geomatics consultancy. 

We are ISO 9001:2008 registered in the industrial, municipal, transportation, oil & gas, and land development sectors. 

At Opus Stewart Weir we talk a lot about ‘Embracing the globe, igniting our passion’. This strategic vision guides our team of experts as they embrace our clients’ challenges with energy and innovation, and as we continue to grow, incorporate new technologies, expand our services, and move into exciting new areas.


Our delivery model for civil engineering projects and services focuses on transportation infrastructure, geotechnical engineering, civil infrastructure and environmental services.


We are serious about minimising the impacts of our operations on the environment. Our Green Light strategy ensures we incorporate green alternatives in our planning and business processes, and the work we do for our clients. 


Pipelines & Power Infrastructure form the backbone of this discipline. From preliminary design and routing to final construction, these offerings constitute the suite of services in this area. Other offerings include: industrial surveying, GIS, legal land surveying, and mapping & imaging.

ISO certified

Our policy is to always provide top quality services that meet the unique needs of our clients. Our commitment to quality management was formally recognised when we achieved ISO registration.