5QS is a leading multi-disciplinary consulting engineering firm. Practising since 1984, we have developed a sound reputation for delivering outstanding project focused services providing technically excellent and innovative solutions. We provide civil, structural, geotechnical, environmental, Structural Testing, R&D, and Software engineering services for residential, commercial, institutional, and industrial projects. Our multi-disciplinary team can investigate, design, advise and manage your project from concept to completion. 5QS provides comprehensive services across eastern NSW, ACT and Norfolk Island, including the Hunter Valley, Central Coast, Sydney Metropolitan, South West Slopes, ACT, and Norfolk Island. Our Structural testing facility is located off the M1 Motorway at Cardiff and easily accessible from the Metropolitan and Hunter area.

Barker Harle is a leading multi-disciplinary consulting engineering firm, providing technically excellent and innovative solutions on projects throughout NSW. Established in 1984, Barker Harle has developed a sound reputation for delivering outstanding project focused services. Barker Harle provides civil, structural, geotechnical and environmental engineering services for residential, commercial, institutional, industrial and mining projects. Our multi-disciplinary team of engineers can investigate, design, advise and manage your project from concept to completion.

Welcome to RCA Australia. Established in 1994 and based in Newcastle NSW, we provide specialist consultancy services in environmental, geotechnical and groundwater engineering, materials testing, earthworks quality control and environmental monitoring. RCA is an employee owned organisation comprising 60 full-time staff including engineers, scientists, geologists and technicians. Our experienced professionals provide a range of skills to meet your project needs. Through the diversity of services within the RCA business groups we are able to provide integrated solutions that minimise costs whilst producing a high quality solution that meets your needs.

Geotechnical engineering firm