[1] He held an apprenticeship as an electrical engineer from 1987 to 1991 then from 1992 to 1995 he studied at the University of Applied Sciences of the Grisons in Chur.
[1] From 1996 to 1999 he worked as a service engineer at the Alcatel-Lucent in Zurich, then TeleNet project manager at Telecom Liechtenstein.
Since 2001 he is a self-employed telecommunications consultant and from 2004 to 2017 he was the managing director of the data centre operator ICT-Center AG in Vaduz and Zurich.
[2] In August 2018 Landtag member Erich Hasler was expelled from The Independents under controversial circumstances.
[3] In the 2021 Liechtenstein general election he was re-elected to the Landtag as a member of the party in his own right.