Cain Sibley

Steve advises departments of the Commonwealth Government, most notably the Department of Defence, on procurement, contracting and construction matters. He acts for both government agencies and private sector clients participating in government procurement. Steve advises on all aspects of procurement and construction projects including: strategic advice, acquisition strategies, risk analysis, drafting and negotiating contract and tender documentation, contract administration, IT contracts, ris...

Andrew has extensive experience in representing and providing high level, strategic and complex workplace relations advice to a wide range of Commonwealth departments and agencies over the last 15 years. This includes significant experience in litigating on behalf of the Commonwealth (generally on the instructions of Comcover) in the Fair Work Commission, the Federal Court, the Federal Circuit and Family Court of Australia, the Australian Human Rights Commission and the Administrative Review ...

Shelley acts for local and national corporate clients across strata, development, building and construction sectors. Her clients include owners corporations, property developers, contractors, construction companies and corporate entities engaged in disputes and litigation often arising from real estate and construction activity. Shelley specialises in the resolution of corporate governance disputes, commercial and corporate contractual disputes, and residential and commercial construction dis...

Mark has practised the full spectrum of business and corporate law for more than 34 years. He is one of the firm’s founding name Directors and is a NSW Law Society Accredited Specialist in Business Law. His practice concentrates on the areas of contract and commercial law, contract negotiation and drafting, as well as enforcement and compliance strategies. His practice has involved all manner of business-related matters, ranging from advising on the placement of high-end Cray computers ...

Sarah acts for Commonwealth Government agencies and private sector clients on defence and national security matters, export control and regulation, and government procurement. She is part of the firm’s defence and national security practice. Sarah advises on defence and national security legal frameworks, export control obligations under the Defence Trade Controls Act and associated legislation, and government procurement. Her practice spans the legal architecture governing Australia&rs...

Melanie acts for Commonwealth government agencies, statutory entities and corporate clients. Melanie's clients operate across the full spectrum of Commonwealth activity. Her clients include Comcover, ATO and Departments including Finance, Defence, Home Affairs, Industry, Attorney-General's and Agriculture. Melanie joined Thomsons in July 2025 as part of the transition of the one of Australia’s premier Commonwealth government practices. Melanie’s practice spans litigation, dispute ...

Rebecca has extensive experience in advising the Commonwealth in relation to workers’ compensation matters. She is fully cognisant of the responsibilities of the Commonwealth in adhering to the Model Litigant Policy and the unique challenges that this can bring. In a previous role Rebecca successfully held the position of National Client Service Manager for Comcare, which, as a significant client, brought enormous responsibility from a business perspective. Rebecca is focussed on delive...

Hyans acts for Commonwealth, State and Territory government agencies and commercial clients on procurement, contracts and public law matters. Hyans advises on commercial contracts, corporate governance, statutory interpretation, legislative drafting, regulatory law, administrative law, privacy and FOI matters, and procurement and probity. His practice covers all aspects of government contracting from strategy and tender design through contract award and administration, as well as legal advice...

Paul acts for Commonwealth Government agencies, statutory authorities and private sector employers. Paul joined Thomsons in July 2025, bringing with him deep Commonwealth client relationships built over an extensive career. Paul’s practice spans all aspects of employment and industrial relations, WHS governance, administrative law and government procurement. He advises on enterprise bargaining, individual and collective workplace agreements, discrimination complaints, investigations of ...

Sarah acts for Commonwealth Government departments and agencies on procurement, contracting and governance matters. Her client base is primarily the Commonwealth and Commonwealth entities, with a particular focus on defence procurement and capital equipment acquisition. Sarah advises on procurement activities for aviation, land vehicle and maritime assets, governance matters for statutory corporations, contract negotiations, competitive tendering processes and privatisations. She leads contra...