About Rosannah Healy
Rosannah is competition and consumer law specialist, advising on complex ACCC investigations, merger clearances and ACCC authorisations.
She is a trusted adviser to leading Australian companies across sectors including grocery, retail, energy, telecommunications, financial services, healthcare, oil and gas and industrials.
In the energy sector, Rosannah advises clients on competition and consumer matters, as well as regulatory matters involving the Australian Energy Regulator and the Essential Services Commission. She also has significant experience conducting compliance audits, developing compliance programs and supporting large consumer-facing businesses in navigating regulatory risks.
Rosannah's expertise is recognised by Legal 500 Asia Pacific 2025, where she is named a Next General Partner, and by Chambers Asia-Pacific 2025, where she is ranked as a Band 4 practitioner and is noted as being 'a very safe pair of hands' with 'a calm, considered style, even when unexpected or challenging issues arise'.
She is also an active member of the Competition and Consumer Committee of the Business Law Section of the Business Council of Australia, and regularly contributes to law reform and policy.
Recent relevant experience
Merger clearances
- Experian: on securing ACCC clearance in respect of Experian's acquisition of illion
- Zodiac Group: on securing ACCC clearance in respect of the global merger of major pool equipment manufacturers Zodiac and Fluidra
- Vocus: on obtaining ACCC clearance for Vocus' acquisition of Nextgen Networks
- Vocus: on obtaining ACCC clearance for the merger of Vocus and M2
- Royal Dutch Shell plc: on obtaining ACCC clearance for the $98bn takeover of BG Group plc
- Federation Centres: on obtaining ACCC clearance for the merger of property groups Federation Centres and Novion via schemes of arrangement.
Enforcement
- Coles: on the ACCC's investigation and subsequent court proceedings in which the ACCC alleges misleading representations concerning aspects of Coles' Down Down Program
- Coles: on an ACCC investigation into claims made by Coles regarding rebates to be paid to dairy farmers. The matter was resolved administratively
- Origin Energy: on investigations by the Essential Services Commission and subsequent court proceedings regarding alleged breaches of the hardship, life support and billing protections under the Electricity Retail Code of Practice
- Origin Energy: on an investigation and subsequent court proceeding by the Australian Energy Regulator on alleged breaches of the hardship protections
- Origin Energy: on an investigation and subsequent court proceeding by the Australian Energy Regulator on alleged breaches of the life support provisions.
- Alinta: on an enforceable undertaking with the Australian Energy Regulator to resolve an investigation into breaches of the life support provisions of the National Energy Retail Rules
- Coles: on an ACCC investigation and subsequent court proceedings concerning alleged unconscionable conduct in respect of dealings with certain suppliers
- Vocus: on ACCC court proceedings regarding broadband speed claims
- Vocus: on an ACCC investigation into a claim made by Vocus that its NBN plans were 'perfect for streaming'. The ACCC agreed to settle the matter by way of enforceable undertaking
- Sensis: on an ACCC investigation into automatic contract renewal and cancellation processes. The ACCC agreed to settle the matter by way of enforceable undertaking
- Steamships Trading Company Ltd: on successfully resolving the first competition law proceedings brought by the PNG Competition regulator.
Market inquiries
- Acting for Coles in the ACCC's Supermarkets Inquiry, Perishable Goods Inquiry and Dairy Inquiry
- Acting for a major bank in the ACCC's Home Loans Inquiries and Foreign Exchange Inquiry
- Acting for a major oil and gas company in the ACCC's Upstream Gas Inquiry
- Acting for an energy company in the ACCC's retail electricity Inquiry.
ACCC authorisations
- The Australian Banking Association: to facilitate cooperation among major banks, supermarkets and other retailers to support access to cash
- Coles: with various authorisations, including to facilitate industry cooperation during the COVID pandemic and following the collapse of the REDcycle soft plastics recycling program
- Australian Energy Council: to facilitate industry cooperation in respect of financial assistance and other relief to customers during the COVID pandemic
- AEMO: with various urgent authorisations, including to facilitate industry cooperation to support electricity reliability and stability during the COVID pandemic and as part of the energy transition
- Water Services Association of Australia: to support cooperation among water authorities to improve the resilience of the gaseous chlorine supply chain in Australia, a critical input to Australia's water system
- Major hospital group: to facilitate collaboration between private and public hospitals during the COVID pandemic.