Our Services

SEM Group delivers a full suite of civil construction, utilities, and water infrastructure services across South Australia. With more than 40 years of experience and a proven track record built on quality, safety, and innovation, we provide end-to-end project solutions for government, commercial, and private sector clients.

Our teams combine technical expertise, modern plant resources, and industry best practice to deliver safe, reliable, and cost-effective outcomes, from small works through to major infrastructure programs.

Quality Without Compromise

Industry best-practices, rigorous standards, and attention to detail that ensures long-lasting, high quality performing infrastructure.

Safe, Reliable Delivery

Certified safety systems, trained crews, and disciplined execution that protects people, communities, and assets.

Expert Planning & Execution

Comprehensive pre-construction planning paired with disciplined on-site delivery to keep projects on time and on budget.

Civil Construction

SEM’s civil division has built a strong reputation for delivering high quality civil construction projects across metropolitan and regional South Australia. Our capability spans the full lifecycle of civil works – from early earthworks to final reinstatement.

Major Road Construction, Reconstruction & Upgrades
Urban arterial roads, intersections, roundabouts, pavements, and national highway works.
Concrete & Steel Structures
Retaining walls, culverts, bridge components, footings, reinforced structures, and complex formwork.
Bulk Earthworks
Cut and fill operations, site reshaping, large-scale material movements, pad preparation, stormwater basins, and embankments.
Industrial & Commercial Developments
Civil works for new precincts, subdivisions, commercial facilities, and industrial complexes.
Foundation & Subgrade Works
Stabilisation, compaction, geotechnical treatments, and ground improvement methods.
General Site Works & Landscaping
Footpaths, kerbing, hardstands, verge treatments, and site beautification.
Creek & Environmental Rehabilitation
Erosion control, bank stabilisation, and sediment management.

Our civil team brings strong technical capability, detailed planning, and an uncompromising commitment to quality – ensuring every project is delivered efficiently and built to last.

Utilities Infrastructure

SEM’s utilities division specialises in delivering essential underground infrastructure for water, wastewater, electrical, communications, and drainage networks. Our teams work within live service environments and consistently achieve safe, accurate, and compliant outcomes.

Water & Sewer Reticulation
New mains, renewals, extensions, connections, disconnections, and service relocations.
Pump Station Construction & Upgrades
Civil, mechanical, and electrical components for both water and wastewater systems.
Stormwater Drainage Systems
Pits, culverts, pipe installations, upgrades, and large-diameter drainage infrastructure.
Manhole Construction & Maintenance
Precast, cast-in-situ, rehabilitation, and access infrastructure.
Electrical & Communications Infrastructure
Conduits, pits, underground services, sub-surface cable routes, and associated civil works.
Large Diameter Pipelines
Trench excavation, installation, bedding, backfill, testing, and commissioning.
Emergency Repairs & Asset Response
Rapid mobilisation for break repairs, service reinstatement, and urgent field works.
Waste Water Treatment Plants
Civil and structural works for new and upgraded treatment facilities.
Substation Works
Foundations, equipment pads, conduits, cable routes, and associated infrastructure.

Every project is delivered under strict quality, safety, and environmental controls, supported by specialist crews with extensive experience working in high-risk, service-dense environments.

Water Infrastructure

SEM’s water division manages large-scale water main replacement programs and major water infrastructure upgrades throughout the Adelaide metropolitan area. Our long-standing experience in this sector has seen us deliver complex renewals within both urban and high-traffic environments.

Water Main Renewals
DN100-DN600 and beyond, replacement of aging assets, new alignments, open-cut construction, and trenchless installation support.
Connections, Disconnections & Commissioning
Detailed planning, property coordination, and safe integration into existing networks.
Program Delivery & Long-Term Frameworks
Management of multi-year replacement schedules, strategic planning, and high-volume delivery.
Integrated On-Site Teams
Co-located operational and project management staff supporting streamlined communication and rapid decision making.
Specialist Plant
Modern equipment fleets, accredited field teams, and dedicated water infrastructure crews.

Our water division is experienced in managing high-volume annual outputs, ensuring consistency, quality, and predictable delivery across large-scale programs.