Education
Christensen studied at the University of Western Australia, where he obtained a Bachelor of Laws, a Bachelor of Jurisprudence and a Bachelor of Commerce. The university was established by an act of the Western Australian Parliament in 1911 and became the first university in the state, serving as a central institution for legal and commercial education in Perth.
The Bachelor of Jurisprudence was one of the university's law qualifications, and the combination of law and commerce degrees reflected the practical orientation of the professions that graduates of the period entered, including commercial practice and business law.
Career
Christensen's documented professional career centers on Mallesons Stephen Jaques, where he worked as a partner. The firm traces its origins to nineteenth-century Sydney practices, including a practice founded by Montague Stephen in 1849. Its present name dates from 1987, when Stephen Jaques Stone James merged with Mallesons, and the firm later combined with King & Wood PRC Lawyers in 2012 to form King & Wood Mallesons.
Christensen was admitted to the bar in Australia in 1982. In Australia, admission to legal practice is the formal step that permits a person to practise law, and it preceded his later work as a partner of the firm.