# Symphony Infrastructure Partners

> Symphony Infrastructure Partners is a Sydney-based energy transition infrastructure services platform that develops, delivers, owns and operates high-voltage grid-connection infrastructure for Australia's renewable energy, storage and data-centre projects. Founded in 2022 by Steve Butler, Symphony offers an end-to-end integrated solution - from grid strategy and engineering design through HV construction, commissioning, operations and asset ownership - aiming to eliminate the connection bottlenecks that slow the rollout of wind, solar, battery and digital infrastructure. In 2024 it raised A$488 million in Series A financing led by Blackstone to fund a series of acquisitions and build one of Australia's leading independent connection-infrastructure platforms.

- **Founded:** 2022
- **Headquarters:** Sydney, Australia
- **Founders:** Steve Butler (Founder & Chief Executive Officer)
- **Team size:** 1,300+ in-house national workforce (per company website); ~34 corporate/professional staff (per Apollo)
- **Products:** Concept & Grid Strategy, Engineering & Design, HV Construction, Testing & Commissioning, Operations & Maintenance
- **Notable:** Raised A$488M Series A in 2024, one of the largest energy-transition platform raises in Australia, led by Blackstone, Managed 11.7 GW+ of grid connections, Constructed and commissioned 7.4 GW+ of connection capacity

## Products & services

- **Concept & Grid Strategy** — Grid strategy planning and connection scoping to give projects a clear, de-risked path to the network.
- **Engineering & Design** — High-voltage engineering and design services for switchyards, substations and transmission lines.
- **HV Construction** — Construction of high-voltage switchyards, substations and transmission lines with a 1,300+ in-house national workforce.
- **Testing & Commissioning** — Testing and commissioning of connection assets to bring projects safely online.
- **Operations & Maintenance** — Ongoing operations, maintenance and lifecycle management of connection infrastructure.
- **Asset Ownership** — Long-term ownership and lifecycle management of connection assets, allowing clients to offload capital and risk.

## Achievements

- Raised A$488M Series A in 2024, one of the largest energy-transition platform raises in Australia, led by Blackstone
- Managed 11.7 GW+ of grid connections
- Constructed and commissioned 7.4 GW+ of connection capacity
- Delivered 100+ high-voltage substations
- Constructed 5,000+ km of powerlines
- Built a 1,300+ strong in-house national workforce within a few years of founding
- Completed a series of five acquisitions to assemble an integrated connection-infrastructure platform

## Latest updates

- **2024-08** — Completed A$488M Series A financing led by Blackstone (A$300M) with a A$188M CBA senior debt facility, funding a series of five acquisitions.
- **2024-07** — Blackstone announced its strategic minority investment in Symphony via Blackstone Tactical Opportunities.

## Links

- Website: https://symphonyinfra.com.au
- LinkedIn: https://www.linkedin.com/company/symphonyinfrastructure

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Profile page: https://yespress.io/symphony
Published by YesPress — https://yespress.io
Last updated: 2026-07-25