Western Sydney Airport Landside Civil and Buildings Package AeroWest Joint Venture (Seymour Whyte and BMD)
Overview
As part of the AeroWest Joint Venture, Seymour Whyte and BMD delivered the Landside Civil and Building (LCB)Works package for the Western Sydney International Airport (WSI).
Through a disciplined governance approach, the project delivered 33.62% operational energy savings (3,272.77tCO₂‑e), a 33% reduction in embodied carbon (37,110.39 tCO₂‑e), a 79% reduction in total water use (1.29 million kL),and 100% reuse of onsite spoil and topsoil, while enabling six targeted employment, training and educationprograms – leaving a measurable and enduring environmental and social legacy for Western Sydney.
Through a unified sustainability governance framework established at project inception, the senior managementcommittee aligned sustainability objectives with cost, risk and program controls. Sustainability was embedded intoformal design and construction gateways, with specialists ensuring risks and opportunities were actively assessedand optimised.
The project team prioritised the review of bridges, pavements and materials, identifying optimisations to reduceembodied carbon and maximise reuse of site-won resources, while low-carbon construction methodologies wereintegrated via bespoke solutions and early subcontractor collaboration. Governance translated into frontlinedelivery through practical measures including solar-powered site amenities, reduced plant usage, water-efficientlandscaping and non-potable water sourcing, ensuring sustainability performance was actively managed.
Outcomes achieved
The AeroWest Joint Venture’s sustainability governance framework guided the project to achieve sustainabilityoutcomes across priority areas, including a 33.62% reduction in operational energy use (3,272.77 tCO₂‑e).
These outcomes were enabled through governance-driven optimisation of the bridge spans, piers, girders andabutment walls, which reduced the use of materials, plant and equipment. Additionally, the project value engineeredthe depth and extent of pavements and replaced retaining walls with landscaped batters. During construction,sustainable procurement streamlined works and reduced plant and equipment requirements, including theadoption of an innovative landscaping product (Flexterra) that stabilised batters and applied seed in a singleapplication.
Solar power was adopted widely, including solar lighting for car parks, solar‑powered satellite amenities andpermanent photovoltaic installations supplying operational energy for the buildings. Enhanced buildingperformance measures – including improved insulation, sealing, shading and high‑efficiency heating and ventilation– further reduced long‑term energy demand.
Water efficiency was prioritised from the outset, resulting in a 79% reduction in total water use (1,295,469 kL). Thiswas achieved by reducing dust‑suppression areas, selecting drought‑tolerant landscaping species, removingirrigation requirements and installing water‑efficient fixtures. In addition, 34.63% of potable water (116,837 kL) wasreplaced by non‑potable sources, including an onsite detention basin and supplementary supply from a nearbyquarry.
The project’s integrated sustainable procurement strategy embedded circular economy principles (minimising wastevia reuse of materials) across all major materials, delivering a 33% reduction in embodied carbon (37,110.39 tCO₂‑e)while strengthening supply chain resilience and mitigating material shortage risks. Key initiatives included thestabilisation of 85,929.8 m³ of in‑situ material, eliminating the need for virgin imports, and procurement of 593,678tonnes of recycled sandstone, dense graded base, and subbase. In parallel, a targeted low carbon concreteprocurement strategy reduced emissions by 17,418 tCO₂‑e.
Social sustainability was governed through defined targets, formal reporting and weekly executive oversight. As aresult, the AeroWest Joint Venture delivered six structured community programs:
- Innovate STEM Engagement Program: Practical engineering challenges, site tours, career pathways sessions andinvolvement in the CSIRO Generation STEM (science, technology, engineering and mathematics) program.
- Women in Trade Partnership: Empowering young women through career talks and engagement with over 200students at the EmpowerHER Trades Event.
- Schools Engagement and Mentoring Program: Mentoring, mock interviews and site tours delivered in partnershipwith the Australian Business and Community Network, schools and WSI.
- Clontarf Foundation Partnership: Strengthening education‑to‑employment pathways for young Aboriginal andTorres Strait Islander men, resulting in direct employment.
- Police Citizens Youth Club (PCYC) Partnership: Supporting disadvantaged youth through Fit for Work programs,skills development and sponsorship of the PCYC Gala Ball.
- Refugee and Migrant Employment Support: Delivering site tours, skills workshops and job‑readiness sessions inpartnership with WSI.
Outcomes were shared through design and construction workshops, project‑wide Toolbox Talks, quarterlycontractor sustainability forums, Seymour Whyte and BMD internal communications, the WSI Airport AnnualSustainability Report, the Seymour Whyte Environment and Sustainability Conference, and quarterlyknowledge‑share sessions – ensuring learnings were extended beyond the project to drive sector‑wideimprovement.
Beneficiaries from the project
The people and communities in Western Sydney were the primary beneficiaries of this work package. Through aunified sustainability governance framework, the project delivered significant emissions and resource reductions(materials, water, spoil and topsoil), which lowered landfill demand and reduced long-term operational impacts inone of Australia’s fastest growing regions.
Local communities also benefited from upskilling and employment opportunities that will contribute to the long-term economy. Six structured employment, training and education programs embedded within project deliveryprovided students, graduates and job seekers with direct exposure to live construction environments, mentoringsupport, and clear education-to-employment pathways.
Underrepresented and disadvantaged groups also experienced targeted benefits. Young Aboriginal and Torres StraitIslander men (via Clontarf), disadvantaged youth (via PCYC), refugee and migrant job seekers, and female studentsconsidering trade careers, received mentoring, site access and employment pathway support. The partnershipmodel delivered tangible outcomes, including direct employment and career progression.
The future construction workforce benefited through STEM engagement, mock interviews, placements and industry-led workshops, helping address sector-wide skills shortages and increasing diversity in trades and engineering roles.
The client and broader infrastructure sector benefitted from a replicable governance model that demonstrates howstrong sustainability integration can deliver measurable environmental and social outcomes in complex, multi-contractor environments. Through structured workshops and formal gateway reviews, sustainability capability wasembedded across designers, engineers and supervisors, ensuring sustainability informed decision-making fromconcept to commissioning. This capability uplift drove measurable carbon, water and material efficiencies.
Leaving a legacy
The AeroWest Joint Venture delivered a lasting legacy through measurable environmental performance,strengthened community capability, and establishment of a replicable sustainability governance model for complexinfrastructure delivery.
Environmental legacy
The project achieved a 33.62% reduction in operational emissions (3,272.77 tCO₂-e), a 33% reduction in embodiedcarbon (37,110.39 tCO₂-e), a 79% reduction in total water use (1,295,469 kL), replacement of 34.63% of potable waterwith non-potable sources, and 100% reuse of topsoil.
These outcomes embed long-term efficiency into the WSI asset, reducing operational impacts over its lifecycle andminimising resource depletion in a high-growth region. The integration of circular economy principles, includingstabilisation of in-situ materials, procurement of 593,678 tonnes of recycled materials, and implementation of a low-carbon concrete strategy, resulted in a permanent reduction in embodied carbon within the asset.
This contributes to:
- SDG 6 – Clean Water and Sanitation (water efficiency and non-potable reuse)
- SDG 7 – Affordable and Clean Energy (solar PV integration and energy efficiency)
- SDG 9 – Industry, Innovation and Infrastructure (sustainable infrastructure delivery)
- SDG 12 – Responsible Consumption and Production (circular economy integration)
- SDG 13 – Climate Action (substantial emissions reduction)
Social and workforce legacy
A deliberately governed employment, training and education strategy delivered six structured community programstargeting students, First Nations participants, women in trades, disadvantaged youth and refugee job seekers.
Through partnerships with Clontarf, PCYC, local schools, WSI and industry networks, participants gained direct siteexposure, mentoring, training, and defined employment pathways. The partnership model achieved tangibleemployment outcomes and strengthened long-term workforce participation in Western Sydney.
This contributes to:
- SDG 4 – Quality Education (mentoring, STEM engagement, structured career pathways)
- SDG 5 – Gender Equality (Women in Trade initiatives)
- SDG 8 – Decent Work and Economic Growth (employment pathways and workforce capability)
- SDG 10 – Reduced Inequalities (targeted support for First Nations, refugee and disadvantaged youth)
The project institutionalised a governance model in which sustainability performance was subject to the sameexecutive oversight, reporting and assurance as cost and program, demonstrating how complex, multi-contractorinfrastructure can deliver measurable environmental and social value without compromising commercial outcomes.