Company Overview

Seymour Whyte is a leading Australian infrastructure contractor known for delivering innovative and sustainable construction solutions. As part of the global Vinci Group, we leverage international expertise to execute complex projects across various sectors, including transport, utilities, and defence.

Established in 1987, Seymour Whyte has built a strong reputation for quality, safety, and environmental stewardship. Our diverse portfolio includes major road and bridge constructions, water infrastructure, and urban development projects. We specialise in various contract types such as design and construct, early contractor involvement, managing contractor, and public-private partnerships (PPP).

Our team of skilled professionals collaborates with clients, stakeholders, and communities to deliver projects that exceed expectations. We are committed to fostering innovation, embracing new technologies, and driving continuous improvement.

Products and Services

Seymour Whyte provides specialised construction services for defence projects, focusing on six core capabilities:

  • Airports (landside and airside): Construction and upgrades of runways, taxiways, terminals, and support facilities.
  • Civil infrastructure: Building and upgrading roads, bridges, and drainage systems.
  • Functional buildings: Designing and constructing offices, barracks, training facilities, and maintenance depots.
  • Ports and marine: Developing and enhancing wharves, jetties, and marine infrastructure.
  • Guided Weapons and Explosive Ordnance (GWEO): Constructing facilities for the safe storage and maintenance of ordnance.
  • Utilities: Constructing and maintaining water, wastewater, electrical, and communications infrastructure.

Our dedication to excellence, safety, and innovation ensures high-quality construction projects for the defence sector.


Full accreditation for building, civil and infrastructure works in South Australia and throughout Australia.



  • Architectural, Engineering and Technical Services
  • Building Construction
  • Construction
  • Construction Services
  • Heavy and Civil Engineering Construction
  • Management and Related Consulting Services
  • Other Construction