Ross is the firm principal of Colthorpe Lawyers. As a barrister and solicitor he started his own office at Christies Beach in 2003 after working for other reputable criminal law firms in Adelaide. He completed his Bachelor of Laws and Legal Practice at Flinders University, passing with honours and is admitted to practice in the Supreme Court of South Australia, all Federal courts and the High Court of Australia. He is a current member of the Law Society. Colthorpe Lawyers has been the sponsor for the Flinders University Students witness examination competition for the past three years and Ross actively participates in the judging of the competition.
Ross prides himself on fighting for the rights of the defendant. It is easy to see how people become overwhelmed with the criminal justice system, particularly on the first occasion. Helping people through that process and bring the best possible outcome for the client is one of the highest priorities in his business.