Sebastian accepts briefs in all areas of law, but the focus of his practice is commercial, corporations, and equity matters. He appears both led and unled in trials and appeals in courts and tribunals throughout Australia, as well as in arbitrations seated domestically and overseas. The 2021 Chambers Guide to Dispute Resolution Counsel describes Sebastian as "one of the rising stars of the Bar," while also remarking on his "exceptional" advocacy and "good strategic thought."
Prior to coming to the Bar, Sebastian was Associate to the Hon Justice Robert French, then Chief Justice of the High Court of Australia, and spent a number of years working in the commercial litigation practice at Piper Alderman. He has an extensive academic background, having been awarded a BA and LLB (University Medallist) from Macquarie University, a BCL (Distinction) (Oxon), and a Doctor of Philosophy (Oxon), and his academic writing has been cited by the High Court of Australia and the NSW Court of Appeal.
Chambers Guide - 2021 (Australia wide) - Band 4 Dispute Resolution Junior Counsel - "enjoys an 'excellent reputation as an up-and-coming junior on complex cases.' One source calls him 'one of the rising stars of the Bar,' while another observes that he is frequently 'selected by top silks to ride shotgun.' He is characterised not only as a 'commercial, hands-on practitioner with a lot of energy' who 'works well in a team,' but also as 'an exceptional advocate' and source of 'good strategic thought' in his own right."
Doyles Guide - 2021 (NSW) - Recommended commercial litigation and dispute resolution junior counsel
Doyles Guide - 2019 & 2020 (Australia wide) – Leading arbitration junior counsel