Mario Hegner started his professional life in 1971 with a banking apprenticeship at Schweizerische Kreditanstalt, Zurich. He then worked for this bank on the Zurich Stock Exchange until 1986, also as a Stock Exchange open outcry trader.
From 1987 until 2012, Mario Hegner worked for the Swiss branch of ABN Amro Bank in Zurich in a variety of positions in Stock Exchange trading.
At the end of 2012, Mario Hegner changed his field of activity to Risk and Compliance at High Value Partners AG in Liechtenstein.
Back in Zurich, Mario Hegner has been responsible for the Risk and Controlling division at Holinger Management AG since 2015.