Australia’s energy transition is intended to build a more secure and self-reliant system. But the central challenge in the transition is no longer policy, but delivery – and addressing it will require portfolio-level thinking.
Hamish King and Stuart Cassie, TBH
Australia’s energy transition is unfolding against an increasingly uncertain global backdrop. Recent instability in the Middle East has driven up fuel prices and renewed attention on Australia’s exposure to global energy price shocks, with effects felt across the wider economy. This is precisely what the transition is intended to address: a low emissions energy system less exposed to external shocks and more firmly anchored in domestic renewable energy resources.
Yet the gap between ambition and delivery is widening. The challenge is no longer capital or intent, but the ability to deliver infrastructure at pace and scale. As generation, transmission, storage and grid projects move forward in parallel, drawing on the same limited pools of labour, equipment and approvals, delays in one area are slowing progress elsewhere, amplifying bottlenecks and cost pressures.
What we are now seeing is the consequence of managing a complex, high-risk national build-out as a series of separate projects. Put simply, Australia needs to stop using project-level thinking to solve what is now a portfolio-level problem.
Why project-by-project delivery is no longer enough
From a delivery perspective, this is unsurprising. Having spent more than six decades inside complex infrastructure programmes, TBH is often brought in when large portfolios begin to drift and time, cost and risk start to move out of alignment. Large infrastructure systems behave differently at scale. Risk compounds through shared constraints and sequencing failures and projects become interdependent, competing for the same supply chains, workforce, approvals, access and delivery windows.
Generation projects, transmission infrastructure, storage and grid upgrades all depend on one another, yet many are still delivered individually. That isolation creates a familiar outcome in large programmes, where infrastructure is delivered out of sequence or is constrained to the pace of the slowest component. Renewable generation can be ready before transmission infrastructure is in place, or grid capacity can arrive after projects are built. The current delivery model can also drive duplication, with private developers often required to secure grid connection, access and enabling infrastructure independently, creating overlap and increasing cost and complexity.
When infrastructure is delivered this way, delays compound across the system and risk increases. These are not isolated issues, but symptoms of a national infrastructure programme being managed project by project rather than as a coordinated whole.
What portfolio-level coordination looks like
A national, portfolio-level approach would move beyond individual project delivery toward a coordinated pipeline, giving developers, asset owners and governments a shared view of how projects interact across the transition and enabling more informed decisions about sequencing, timing and shared constraints.
Such coordination would need to operate across all levels of government: at the Commonwealth level, to align long-term system needs through integrated modelling; at the state level, to coordinate sequencing, connection timing and infrastructure readiness; and at the local level, to provide greater clarity on regional delivery, community impacts, workforce mobilisation and enabling infrastructure. Greater alignment between Commonwealth, state and local governments on approvals is essential.
It also means planning beyond near-term milestones. A longer horizon – towards 2050 and beyond – would allow generation, transmission, storage and grid upgrades to be staged against future-proofed whole-of-system needs, while enabling infrastructure such as transmission access to be planned once, at scale, rather than replicated across projects.
Lessons from other markets
Across Asia-Pacific and the Middle East, we are already seeing elements of this approach in practice. In Singapore, the Energy Market Authority plans the energy system as an integrated whole, taking a long-term view to 2050 and coordinating grid capability, domestic supply, storage and low-carbon electricity imports against future demand. A similar approach can be seen in Abu Dhabi, where Emirates Water and Electricity Company links long-term demand forecasts to a published forward capacity plan.
China offers a different but equally instructive example. Its renewable energy rollout has been delivered at unmatched scale and speed, enabled by strong central coordination, infrastructure standardisation and policy settings that direct development towards priority regions and projects. Transmission and generation have been planned in parallel, reducing the risk of misalignment.
The governance model is different, but there are clear lessons: standardisation, coordinated longer-term planning and alignment of policy with delivery priorities can materially reduce friction and duplication in large-scale infrastructure programmes.
Australia already has strong foundations. Through the Integrated System Plan, AEMO has established a national view of the generation, storage and network investment needed over the long-term. As the transition moves into delivery, this provides a platform for stronger national coordination.
The broader implications
How Australia delivers this transition will shape not only the pace of continued decarbonisation, but the country’s resilience, economic strength and capacity to create more value from its own resources. Coordinated delivery would support faster development of renewable generation and transmission, improve reliability, reduce overall cost and accelerate the shift towards domestic energy sources, reducing exposure to external shocks.
Reliable, lower-cost energy would also support growth in data centres, advanced manufacturing and the onshore processing of critical minerals and other resources, where access to power is increasingly the primary constraint on investment.
At this scale, success depends not on individual projects, but by how well they are planned, sequenced and delivered together. If Australia wants to strengthen energy security and realise the broader economic benefits of the transition, it will need to manage it as the national infrastructure portfolio it has become.
