# Steve Butler

> Steve Butler, also publicly listed as Steven Butler, is the Sydney-based founder and CEO of Symphony Infrastructure Partners. Previously the founder of mobile-tower business Stilmark, he now leads a grid-connection infrastructure platform backed by Blackstone, bringing together construction capability, capital and long-term asset operation.

- **Role:** Founder & Chief Executive Officer at Symphony Infrastructure Partners
- **Organizations:** Symphony Infrastructure Partners, Stilmark Group, South Australian Government Entrepreneurship Advisory Board (founding member)
- **Education:** Bachelor of Finance; Bachelor of Economics, The University of Adelaide, Bachelor of Finance (Int), as listed by Crunchbase, University of California, Irvine
- **Known for:** Founded Stilmark and built its mobile-tower infrastructure business before the OMERS acquisition agreement announced in 2022., Founded Symphony Infrastructure Partners in 2022., Led Symphony through a A$488 million financing package in 2024, comprising A$300 million in Blackstone investment and A$188 million in senior bank debt.

## Career timeline

- **2013** — Founded Stilmark, a developer, owner and operator of mobile-tower infrastructure.
- **2018** — Named as a member of the new South Australian Entrepreneurship Advisory Board.
- **2018** — Won the EY Entrepreneur of the Year award for the Central region, according to his 2020 conference biography.
- **2020** — As Stilmark founder and CEO, announced a telecommunications infrastructure consortium with OMERS Infrastructure and ATN International.
- **2022** — OMERS announced an agreement to acquire Stilmark on 22 June; Butler founded Symphony in 2022.
- **2024** — Blackstone announced an investment in Symphony on 18 July. The A$488 million debt and equity financing supported five acquisitions.
- **2025** — Signed Symphony’s January submission to the Australian Energy Regulator on electricity transmission ring-fencing.

## Achievements

- Founded Stilmark and built its mobile-tower infrastructure business before the OMERS acquisition agreement announced in 2022.
- Founded Symphony Infrastructure Partners in 2022.
- Led Symphony through a A$488 million financing package in 2024, comprising A$300 million in Blackstone investment and A$188 million in senior bank debt.
- 2018 EY Entrepreneur of the Year, Central region, as recorded in his conference biography.
- Founding member of South Australia’s Entrepreneurship Advisory Board.

## Latest updates

- **2025-01** — Signed Symphony’s submission supporting expanded ring-fencing and greater competition in electricity transmission connection services.
- **2024-08** — Allens detailed Symphony’s A$488 million financing and acquisition of five portfolio companies.
- **2024-07** — Blackstone announced its structured equity investment in Symphony.

## Links

- Website: https://symphonyinfra.com.au/
- LinkedIn: https://www.linkedin.com/in/steven-butler-47213321/

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Profile page: https://yespress.io/steve-butler
Published by YesPress — https://yespress.io
Last updated: 2026-10-21