William Marshall



William accepts briefs in all areas of civil and commercial law, with a specialism in major infrastructure and construction disputes.

Prior to being called to the bar, William was a Partner in the Construction Advisory and Disputes team at Pinsent Masons in Sydney.  As a Partner, William regularly provided strategic advice on major infrastructure and construction projects and disputes, and has appeared in NSW courts, in expert determinations, arbitrations, mediations and before Dispute Advisory Boards.

William has also worked as a solicitor and advocate in the Middle East and was a registered lawyer with the Dubai Legal Affairs Department.  He has advised on, and appeared in, major international arbitrations in numerous jurisdictions under the ICC Rules, the ADCCAC Rules, the DIAC Rules, and in ad hoc arbitrations under the Singapore Arbitration Act and the UNCITRAL Rules.

William holds a Masters in Construction Law from the University of Melbourne (Hons 1 equivalent), as well as a Bachelor of Laws and Bachelor of Media from Macquarie University.  William earned academic prizes at both undergraduate and postgraduate level.   William has also studied the Harvard model of negotiation at Harvard Law School.

William is currently studying for his LLM at the University of Melbourne.

William was recognised by Doyle’s Guide as a Leading Construction and Infrastructure Litigation Lawyer in 2019 and 2020.

Michael Lyons



While Michael accepts briefs in all areas of commercial litigation, he has developed particular expertise in complex, lengthy and high-value commercial, construction and resource disputes.
Michael has ranked as one of the leading junior counsel in Queensland in both commercial litigation and construction disputes, and as one of the leading junior counsel in Australia in construction disputes.

Michael Wells



Michael practises in commercial law and public law, and has a particular interest in tax law.

Michael is a member of the New South Wales Bar and an interstate member of the Victorian and Queensland Bars. He has appeared led and unled in trials and appeals in a range of courts and tribunals, regularly appears in the Supreme Court of New South Wales and Federal Court of Australia and is entitled to practise in all Australian jurisdictions.

Before coming to the Bar, Michael practised as a litigation solicitor at Allens and Herbert Smith Freehills specialising in class actions, complex contractual and corporate disputes, and tax and financial services regulatory investigations and disputes. Before practising as a solicitor, Michael was Tipstaff and Researcher to the President of the New South Wales Court of Appeal, the Hon Justice Allsop AO.

Michael has postgraduate qualifications in law and tax from the University of Sydney.

Michael is a member of the Law Council of Australia Business Law Section Taxation Committee, Australian Bar Association Taxation Committee, Tax Institute Dispute Resolution Technical Committee, Federal Court of Australia Taxation NPA User Group, Tax Bar Association, International Fiscal Association, and the New South Wales Bar Association Costs and Fees Committee.

Michael is also a reporter for the Commonwealth Law Reports, New South Wales Law Reports and Australian Tax Reports.

Mark Sheldon



Mark specialises in major engineering and construction matters, including infrastructure and mining disputes. He has been consistently recognised in the Doyles Guide as a leading construction barrister in New South Wales and as a Future Leader in Who’s Who Legal: Construction. His broader practice encompasses complex commercial and property disputes.

Mark regularly appears unled in commercial and construction cases at first instance and in arbitrations. He also has experience in the New South Wales Court of Appeal. His client base consists of top-tier Australian and international construction contractors and sub-contractors, multi-national corporations, overseas mining operators, local councils, certifiers, developers and strata owners.

Mark regularly appears in superior courts and tribunals in New South Wales, as well as in other Australian jurisdictions and internationally. He has appeared unled in domestic arbitrations and with highly esteemed Senior Counsel in multi-million-dollar international arbitrations in the Asia-Pacific region, as well as in expert determinations, adjudications and mediations.

Mark provides strategic advice across all aspects of litigation and is commended for his approachability and commitment to achieve the most favourable outcome for his clients. He is also commended for his thorough preparation, strong work ethic and ability to integrate well into a team.

Prior to being called to the Bar in 2015, Mark practised as a solicitor at Corrs Chambers Westgarth and Arnold Bloch Leibler and before that was Tipstaff to the Honourable Justice Einstein in the Supreme Court of New South Wales (Commercial and Technology and Construction Lists). While at Corrs, Mark was seconded to the Australian Centre for International Commercial Arbitration (ACICA) to assist in the drafting of the ACICA Arbitration Rules.

Mark holds a Bachelor of Laws with Honours and a Bachelor of Commerce with Distinction from the University of New South Wales. Previously, he was a headnote author for the New South Wales Law Reports and authored the catchwords for Domestic Commercial Arbitration for the New South Wales Law Reports with John West QC.

Eli Ball



Eli accepts briefs in all areas of civil and commercial law.

Eli regularly advises and appears (both led and unled) in matters before the Supreme Court of NSW and the Federal Court of Australia, as well as lower courts and tribunals. His practice includes general and commercial equity, corporations, class actions, building and construction, insolvency, insurance, professional liability, property, and probate.

Prior to coming to the bar, Eli was a solicitor in the disputes team at Ashurst in Sydney.  He was also previously Tipstaff to the Honourable Justice David Ipp AO at the New South Wales Court of Appeal.

Eli has a Doctorate in Law from the University of Oxford, where he focussed on the laws of restitution, unjust enrichment, equity, trusts, and tracing.  His doctoral thesis, Enrichment at the Claimant’s Expense: Attribution Rules in Unjust Enrichment was published as a book in 2016.  While at Oxford, Eli also completed the Bachelor of Civil Law and Master of Philosophy in Law, and was a college lecturer in contract, equity and trusts, and tort.

Away from the law, Eli is an accomplished marathon butterfly swimmer.  He is the record-holder for butterflying the Rottnest Channel (19.7km) in Western Australia.

Helena Mann



Helena was admitted to the Bar in 2014 after practising as a solicitor at Herbert Smith Freehills and acting as a Tipstaff and Associate to Justice Slattery in the NSW Supreme Court.

She practices mainly in complex commercial and general equity matters (with particular interest in trust and property disputes). More recently she also utilises her extensive commercial experience to assist on complex commercial prosecutions and is part of the 7th Floor’s White Collar Crime Team.

Helena is often able to draw on her legal education and experience in both civil and common law jurisdictions to find unique solutions for complex legal issues requiring a broader perspective.

She was born and raised in Poland where she graduated with a Masters of Law from the University of Warsaw and started her legal career. In 2009 she moved to Australia for love and completed a Bachelor of Law (1st Class Hons) at the University of Sydney. She is fluent in Polish and also knows German and Russian.

Jason Lazarus SC



Jason was called to the Bar in 2004, after spending a year as the associate to the Hon Justice John Lehane of the Federal Court, and then practising as a solicitor for 5 years in a leading law firm.
Jason was appointed Senior Counsel in 2019.

Jason practises in a wide range of jurisdictions and areas of law, ranging from general commercial litigation and equity to planning and environmental law.

Paul Blackburn-Hart SC



Paul has had wide experience over many areas of practice, with particular emphasis in equity and commercial matters, including appellate.
Paul is an experienced mediator, accredited with the NSW Bar Association and the Supreme Court of NSW. He appears in both NSW and interstate cases.
He has also appeared as an expert witness.