Diona Pty Ltd

What This Firm Does

SRG Global Utilities is a specialist infrastructure services company operating across Australia's water security and energy transition sectors. The firm delivers end-to-end asset lifecycle solutions spanning program management, design, construction, community engagement, renewals, and maintenance services. Established in 1980 as Diona and joining the SRG Global group in 2024, the practice brings over 45 years of experience to essential infrastructure projects.

Water Infrastructure Services

The firm provides water and wastewater infrastructure solutions across multiple jurisdictions under various state water management frameworks. Services encompass pipeline renewals, trunk main installations, pump station construction, and reservoir development projects. The practice operates within regulatory requirements including state-based water legislation and Australian standards for water infrastructure design and construction.

• Water pipeline design, construction and renewal programs
• Wastewater treatment facility upgrades and pump station installations
• Trunk main replacement and augmentation projects
• Water storage infrastructure including reservoirs and tank remediation

Energy and Gas Network Solutions

SRG Global Utilities specialises in gas distribution networks and electrical infrastructure supporting energy transition initiatives. The firm carries out gas main replacement programs, substation construction, and underground cable installations. Projects align with Australian energy market regulations and safety standards for gas and electrical network operations.

• Gas main renewal and replacement across metropolitan areas
• Electrical substation construction and expansion projects
• Underground power cable installation and maintenance
• Light rail and public transport enabling infrastructure works

Experience and Major Clients

The practice maintains long-term partnerships with major Australian utilities and government agencies across water, gas, and energy sectors. The firm operates as part of the SRG Global group, employing over 4,500 people across maintenance and construction divisions. Client relationships include Urban Utilities, Sydney Water, SA Water, APA Group, and Hunter Water Corporation spanning multiple decades of project delivery.

• Over 45 years of utilities infrastructure experience since 1980
• Major client partnerships with state water authorities and energy distributors
• Part of SRG Global diversified infrastructure services group
• Demonstrated expertise in complex urban infrastructure renewal projects

Service Areas

SRG Global Utilities operates across all Australian states delivering infrastructure projects in metropolitan, regional, and remote locations. The firm serves communities from Brisbane CBD trunk main renewals to regional South Australian water storage facilities. Project locations span New South Wales, Queensland, Victoria, South Australia, and Western Australia council areas.

• New South Wales including Sydney metropolitan area and regional centres
• Queensland covering Brisbane CBD and regional council areas
• Victoria spanning Melbourne and provincial water authorities
• South Australia including Adelaide metropolitan and remote communities