Marietheres was born and raised in Vienna, Austria. She studied at Vienna University of Economics and Business Administration, graduating in 1981 with a Master's in Social and Economic Sciences (with English and French as her foreign languages and Small and Medium-Sized Businesses as her specialized subject). Her first job was in the finance department of a German steel-construction company. She moved to Portugal in 1983 and dedicated herself to her growing bilingual family while working as a freelance translator of commercial documents from English and later also from Portuguese into German. She founded a youth club, coordinating and running a variety of educational activities. She took a two-year course in philosophy and Catholic theology for laymen and also received training in computer skills and software applications. Since 2004 she has worked for a German-Portuguese power-plant construction company in Lisbon, first as a change manager in the project department, then in the finance department, and lately as a translator working in Portuguese, English and German in the human resources department. She specializes in translations of commercial, legal and financial documents as well as philosophical/religious texts from English and Portuguese into German.