Specialist Geotechnical Contractor
Engineering the Underground World.
Established in 2004, we provide industry-leading expertise in grouting, ground treatment, structural waterproofing, and rock breaking across Australia.
Established in 2004, we provide industry-leading expertise in grouting, ground treatment, structural waterproofing, and rock breaking across Australia.
Grouting & Foundation Works Australia (GFWAust) tackles the most complex ground challenges. Whilst located in NSW, we have worked all over Australia, successfully completing jobs in NT, SA, VIC, QLD, and NSW.
In association with David Lees & Associates (DL&A)—formed in 1999—we provide expert engineering consultancy. Our expertise covers Project Management (Tanahu HPP, Rishikesh- Karanprayag Railway, Mahaweli Water Security Investment Program), Design Management (Delhi Metro, Brisbane North South Bypass), Blasting Consultancy (Parramatta Rail Link, North Side Storage Tunnel), Site Supervision (Singapore Deep Tunnel Sewer System), and acting as an Expert Witness in hydrogeological cases, demolition, and rock breaking arbitrations.
Controlling groundwater and strengthening subterranean structures through precision rock grouting.
Improvement of soft ground via permeation grouting and sand stabilization techniques.
Complete waterproofing of structural concrete essential for longevity and safety.
Conventional and non-explosive rock breaking using PCF (Penetrating Cone Fracture) technology.
Expert design management and blasting consultancy for major civil and mining projects.
Site representation, technical supervision, and expert witness services on massive infrastructure systems.
Additional Sectors: Buildings (Maroubra improvement), Mining (Kestrel Mine, West Wyalong Shaft), Pipelines (Kogan North gas), and specialized Blasting (Eastern Creek stabilization).
With over 40 years of global expertise in mining and underground excavation, David is renowned for developing unique, tailored grouting techniques—including compensation grouting, permeation grouting, and soil mixing—for complex projects. He remains actively involved in the industry as the current Editor for the Australasian Tunnelling Society (ATS) Journal.