Sean Marriott

About Sean

Sean is an ex-engineer and specialises in construction disputes and international arbitration in the oil and gas, mining, power, renewables and public infrastructure sectors, and also in investor-state dispute settlement (ISDS).  He advises contractors on claims and risk management at all stages of the project lifecycle.

He has acted as managing counsel and advocate in construction arbitrations under ICC, LCIA, UNCITRAL, SIAC, ICSID and LMAA rules and in court litigation and has acted in some of the biggest construction disputes in Australia. He also has extensive experience in maritime disputes.

Sean’s expertise in international construction disputes and international arbitration is reflected in his recent appointment by the Attorney-General of Australia as one of Australia’s four appointees to the ICSID Panel of Arbitrators and Conciliators. He was also recently re-appointed as an Australia delegate to the ICC Commission on Arbitration and ADR and is a Fellow of the Chartered Institute of Arbitrators (CIArb) and of the Australian Centre for International Commercial Arbitration (ACICA). Sean lectures and teaches on Construction Law and International Arbitration and is a member of the Thought Leadership Committee of the Society of Construction Law Australia.

He was awarded International Alternative Dispute Resolution Practitioner of the Year at the Australian ADR Awards in 2023 and is ranked in legal directories as one of Australia’s Leading Arbitration Lawyers and as a Construction Law Rising Star.

Sean is admitted in Australia and England & Wales and has practised in London and Perth.