Antal Endrey gained a Doctorate of Philosophy in Law from the Petrus Pázmány University, Budapest in 1944, and a judge's and barrister's diploma in 1947.
Endrey had his own legal practice in Hungary until 1948. In Australia, he held several clerical jobs before enrolling as a law student and graduating with a Bachelor of Laws from the University of Tasmania. Admitted to the Australian Bar in 1957, Endrey practised as a solicitor in Hobart and Melbourne and then as a barrister. He acted as Legal Advisor to the Standing Committee on Statutory Rules and Ordinances of the Australian Senate from 1973 to 1976, was Master of the Supreme Court in 1976 and a Queen's Counsel from 1975.
Endrey wrote not only fiction and drama but also many political, historical and legal studies. He returned to Hungary in 1982, where he published a newspaper.