Before joining the bar, Bill worked as an associate to Justice Sloss of the Supreme Court of Victoria, where he assisted in the hearing and conduct of complex commercial disputes. Bill also practised as a solicitor at MolinoCahill Lawyers, a specialist law firm providing legal advice to clients involved in the construction, infrastructure, technology, defence, and energy and resource sectors.

Bill has experience working on large scale Supreme Court and Federal Court litigation, as well mediation, related to the construction of public and private road, rail and pipeline infrastructure, as well as industrial plants. He has particular expertise dealing with complex expert evidence, and has acted in matters involving civil, mechanical, electrical and chemical engineering, as well as traffic modelling.