Heather Costelloe
About Heather Costelloe
Heather Costelloe is a lawyer based in Sydney, AU and has been recognized in Best Lawyers: Ones to Watch in Australia™ since 2027. Heather Costelloe is recognized in the following practice area:
- Sydney, Australia
- Litigation
Current Firm: A&O Shearman
Location: Sydney, AU
It takes just a few minutes to optimize your profile for clients looking to engage and lawyers who are ready to refer.
Activate your profile and highlight why your peers recognized in Best Lawyers today.
Nearby Lawyers
As Managing Director of Kain Lawyers, Michael is responsible for shaping and advancing the firm’s strategic priorities. Prior to his role as Managing Director, Michael held roles as Head of Growth and Head of Corporate. Michael is an experienced corporate lawyer who has advised some of Australia’s largest corporations and investment funds on their most complex and strategically critical transactions. His practice includes advising on mergers and acquisitions, capital raises, alter...
Tom Brennan SC specialises in conducting major disputes. Recent disputes conducted by him include: concerning claims to foreign state immunity in civil aviation regulatory, commercial, insurance and leasing disputes; disputes with Australian federal government regulatory agencies including the Australian Competition and Consumer Commission, the Australian Securities and Investments Commission, the Australian Communications and Media Authority, the Australian Pesticides and Veterinary Medicine...
Jacquie acts for employers in both the public and private sectors across a wide range of industries and sectors including education, sport, health and aged care, community services, financial services, IT, retail, manufacturing, transport and agribusiness. She acts for organisations of all sizes, from small employers to major institutions. Jacquie advises on individual and collective employment relationships from recruitment through termination and beyond: employment contracts; enterprise agr...
Raina Bernardez is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. Raina, who practices law in Sydney, Australia, has been recognized since 2027. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Raina is held by other top lawyers in the same geographic and legal practice area.
Mary Walker OAM is a top attorney recognized by Best Lawyers in the practice area(s) of Alternative Dispute Resolution and Family Law Mediation. Mary, who practices law in Sydney, Australia, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mary is held by other top lawyers in the same geographic and legal practice area.
Louisa Ryan is a an esteemed Australian lawyer recognized by Best Lawyers in the practice area(s) of Immigration Law. Louisa has been recognized in the 2027 edition of Best Lawyers in Australia. This respected recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Louisa is held by other top lawyers in the same geographic and legal practice area. Louisa is a highly experienced lawyer, practising as a lawyer since 2003. She is the founder and principal of...
Geoff acts for State governments, major construction and infrastructure entities, and international consortia on landmark and multi-billion dollar projects. Geoff advises on all legal aspects of construction, infrastructure, public-private partnerships, alliancing and defence materiel procurement. He is experienced in the negotiation, documentation and administration of major construction, civil engineering, resources, defence and privately funded infrastructure projects, together with allian...
Mark is an experienced and reliable silk practising in tax, equity and trusts, commercial law, public and administrative law, and professional regulation. His clients include individuals, trustees, corporations and government authorities. He is sought out in particular for advice on international, Federal and State taxation and on trusts in tax and non-tax situations. He holds a PhD from Sydney in international tax law and teaches advanced international tax in the Melbourne Law Masters progra...
Consistently ranked by clients and peers as a leading corporate lawyer, Kain Lawyers’ founder has over 30 years’ experience in M&A and equity capital markets law. John’s experience ranges across private equity, capital markets and mergers and acquisitions. His experience in advising public and private companies and investment funds has seen him consistently ranked by Legal 500, the AFR’s ‘Best Lawyers in Australia’ and Doyles Guide as a leading corporat...
Justin Hogan-Doran SC FCIArb FACICA is a Senior Counsel of the Australian Bar and an Arbitrator in international and domestic arbitrations, based at 7 Wentworth Selborne Chambers in Sydney, Australia. He is recognised by his peers as a highly accomplished barrister and arbitrator with expertise in international and cross-border litigation, international commercial arbitration, investor-state disputes and private & public international law. He also has an extensive practice acting and advi...
Explore and Learn
Recognizing Legal Leaders: The 2027 Best Lawyers Awards in Australia, Japan and Singapore
by Jamilla Tabbara
Market drivers, diversity trends and the elite practitioners shaping the legal landscape.
How Far Back Can the IRS Audit You?
by Bryan Driscoll
Clear answers on IRS statutes of limitations, recordkeeping and what to do if you are under review.
Musk v. Altman: The Lawyers Behind the Case
by Jamilla Tabbara
Meet the Trial Lawyers Shaping One of AI's Biggest Legal Disputes.
The Best Lawyers in France 2027: Peer-Reviewed Excellence
by Jamilla Tabbara
Seventeen editions of peer trust, a growing profession and a dynamic legal market.
Announcing the 2027 Best Lawyers Awards: Austria, Germany and Switzerland
by Jamilla Tabbara
Celebrating the legal professionals throughout Central Europe.
The Legal Teams Behind the Blake Lively–Justin Baldoni Settlement
by Grace Greer
A closer look at the legal teams and attorneys involved in the Blake Lively–Justin Baldoni litigation and its resolution.
How AI Is Changing the Way Clients Find Lawyers
by Jamilla Tabbara
Best Lawyers CEO Phil Greer explains how AI-driven search tools are reshaping legal marketing and why credibility markers matter.
When Is It Too Late to Stop Foreclosure?
by Bryan Driscoll
Understanding the foreclosure timeline, critical deadlines and the legal options that may still protect your home.
Can You Go to Jail at an Arraignment?
by Bryan Driscoll
Understanding What Happens at Your First Court Appearance.