Adbri Limited announced the appointment of Ms. Cathy Oster as joint company secretary with effect from 1 March 2023. Ms. Oster is a highly regarded executive with over 30 years' experience in the areas of governance, corporate and commercial law, compliance and risk management. Ms. Oster previously held the role of Head of Legal, Governance and Reporting with Duxton Capital (Australia) Pty Ltd, and prior to that General Counsel and Company Secretary with Beach Energy Limited.

She was also a partner in private legal firms Thomson Geer Lawyers and Piper Alderman Lawyers. Marcus Clayton continues as the principal company secretary of the company.