About Diona

Diona Pty Ltd was established by John and Margaret O’Connor in 1980 and since then has grown to become one of Sydney’s most respected excavation and services firms. In 1989 Diona branched out to all aspects of civil engineering.

As one of Sydney’s most respected excavation, cable installation and infrastructure civil engineering companies, Diona Pty Ltd have been undertaking projects for clients in the utility industry for the past 24 years. Diona Pty Ltd is a successful construction organisation whose focus is on meeting our clients needs and improving processes to meet these needs better than our competitors.

Accredited service providers to Sydney Water, AGL,Transgrid, Telstra and Energy Australia and having worked on various projects for council authorities in the greater Sydney region, Diona Pty Ltd have become specialised in all aspects of trenching, boring/drilling and pipeline installation ranging from water, drainage and sewer installations to gas and electricity infrastructure.

Diona Pty Ltd skills in project management and project delivery are outstanding. Diona Pty Ltd require employees to be proactive in improving the organisation and assist them in this drive. Diona Pty Ltd personnel have all the necessary qualifications which comply with Work Cover regulations governing specialised activities such as working in confined spaces, welding, and plant operation. Diona Pty Ltd’s workforce is well trained in occupational health safety and environmental management, evidenced by our track record of successfully completed projects.