Greg was awarded a Bachelor of Laws and a Bachelor of Arts from the University of New South Wales in 2005. Greg is presently studying a Master of Laws at the University of Sydney.

Prior to joining Harmers in 2011, Greg worked for six years at a major Sydney law firm, working initially in employment and safety law, before moving into Government and administrative law litigation. In his most recent role, Greg specialised in immigration law and advocacy, regularly appearing as solicitor-advocate before the Federal Court of Australia, Federal Magistrates Court and the Administrative Appeals Tribunal. In 2009 Greg instructed the Solicitor-General of the Commonwealth in a matter before the High Court of Australia concerning questions of statutory interpretation.

Since 2008, Greg has given talks on employment law at TAFE, and has been heavily involved in pro bono work and community care initiatives.