Before rejoining UNSW in 2015, Benjamin held academic positions at the University of Montreal (2013-2015), the University of New South Wales (2008-2013), and the University of Lausanne (2005-2008). He was Chairman of the board of a pension fund in Switzerland (with more than 2000 members) from 2006 to 2008. Prior to that, he also worked for companies such as Nestlé (headquarters in Vevey, Switzerland) and La Suisse Insurance Group (Lausanne, Switzerland). Benjamin has a PhD from the Faculty of Business and Administration of the University of Lausanne (Switzerland) in the area of risk theory. He is a member of the Swiss Association of Actuaries since 2006, and is an Affiliate member of the Australian Actuaries Institute since 2008. He is also an academic member of the Casualty Actuarial Society (CAS), and a member of the American Risk and Insurance Association.
Besides carrying out his research agenda, Benjamin is also engaged in teaching development, and has been constantly exploring new pedagogical approaches and strategies to enhance students' learning of technical subjects, in particular with the help of new technologies. He is the inaugural recipient (in 2011) of the Australian School of Business Teaching Excellence Award for "Outstanding Technology-Enabled Teaching Innovation", and was nominated by colleagues and students (in 2012) for a UNSW Vice-Chancellor Award for Teaching Excellence. He recently received a 2015 School of Risk and Actuarial Teaching Innovation Award for his work with Learning Catalytics.