eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1laWQiOiI1MTk0ZjZiNi1lNDY4LTRiZTgtOGUxMy1hMTEyNThkMjk5ZTIiLCJyb2xlIjoiQXBpVXNlciIsIm5iZiI6MTc4NTczODU4OCwiZXhwIjoxNzg1NzM5Nzg4LCJpYXQiOjE3ODU3Mzg1ODgsImlzcyI6Imh0dHBzOi8vd3d3Lm1pbnRlcmVsbGlzb24uY29tL3Blb3BsZS9zaWFuLWtlYXN0IiwiYXVkIjoiaHR0cHM6Ly93d3cubWludGVyZWxsaXNvbi5jb20vcGVvcGxlL3NpYW4ta2Vhc3QifQ.sSbX9JHqCtSWBg9cC2hgM8bUNrlMFpzkR8ShfvbTHiw
https://www.minterellison.com/people/sian-keast
CLOSE
CONTACT US Search Minter Ellison
Sian Keast
Partner, Brisbane
I help government and private sector clients deliver exceptional outcomes in infrastructure and service transformation projects, and in innovative contracting arrangements I combine my experience across all aspects of the project planning, procurement and delivery lifecycle with deep industry understanding, particularly in the transport, health and social infrastructure sectors.

I thrive on working collaboratively to provide practical, strategic solutions and to achieve value for money outcomes for my clients. I have particular interest and expertise in solutions development at the intersection of public policy, market trends and law. I have extensive experience working in a range of sectors, but particularly the transport, health and infrastructure are industries. I am part of the leadership team of Infrastructure Association of Queensland (IAQ), sitting on their Board and co-leading the Catalysing Infrastructure Transformation taskforce.

Career highlights

  • Passenger rail projects: Key adviser to government, project owners and to operators on transformative passenger rail projects and initiatives, including Sydney Metro, Brisbane Metro, Cross River Rail, Gold Coast Light Rail and multiple rollingstock procurement projects.
  • Health: Working closely with government and with private sector developers and operators in planning for, procurement and delivery of hospitals and health facilities, both greenfield and brownfield. My work has also included assisting health authorities and operators with a wide range of construction, operational and governance matters.
  • Public transport: Supporting public transport agencies and operators in the planning for, procurement and delivery of public transport services to achieve exceptional public service outcomes and value for money, including through application of new transport technologies.
  • Corrective services: Helping government plan for, procure and deliver best-practice corrective services facilities and operations, including business case development, corrective services PPPs and outsourcing of services.
  • Port and rail access: Working with infrastructure owners, rail operators and with commodity producers on all aspects of contractual arrangements for development of, operation of and access to regulated infrastructure.
  • Major events: Working with clients for the development of infrastructure such as convention centres, as well as associated social and transport infrastructure and planning required for large scale events.

© 2026 MinterEllison