Marlies Amann-Marxer went to St. Elizabeth Business School in Schaan, where, in 1969, she earned a trade-diploma.

After that she travelled to Neuchâtel, Geneva and Torquay to learn the languages and for business trips.

Additionally she worked from 1970 on in various commercial jobs at the National bank of Liechtenstein, the international steeltrading institute and the Pattchom Int.

From 1989 to 1995 she was employed in her husband's company, the Amann Architektur AG where she was working on human resources, accounting and finances.

Amann-Marxer's first political office was the membership in various community-commissions as well as the election as a member of the local council of Eschen in 2000, where she was holding the portfolio for schools.