Arc Infrastructure has appointed Stephanie Unwin as its new Chief Executive Officer.
She will take over the role from August 4, 2025, replacing Nathan Speed, Arc’s General Manager, Commercial, who has been Acting CEO since Murray Cook stepped down in December 2024.
Unwin has spent the last six years as CEO of Horizon Power, Western Australia’s regional energy provider, which operates across the energy supply chain from retail and transmission to distribution and generation.
In this role, she oversaw the delivery of energy solutions to support regional growth and progressed decarbonisation and digital transformation projects.
Unwin previously held leadership roles at CBH Group, Phylogica International and Synergy (now Verve Energy) as well as a number of directorships at Australian Stock Exchange-listed companies.
Arc Infrastructure Chairman Jonathon Sellar said: “Stephanie has a wealth of experience, a strategic mindset and a deep commitment to innovation and excellence.
“We are excited about the energy and vision she will bring to Arc as we execute on our mission to find new opportunities that will support and strengthen the rail network for the benefit of our customers, partners, communities and Western Australia.
Unwin said she looks forward to working with Arc’s team of nearly 600 employees, to continue delivering for communicities.
“Arc Infrastructure plays a critical role in driving Western Australia’s economic growth,” she said.
“Arc’s responsibility to provide a reliable, safe and sustainable freight rail network is one that the Company honours.
“Furthermore, Arc is committed to supporting the state’s growers, miners, businesses and regions who use its network.”
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