Marianne's research interests have been so far different aspects of environmental hazard and risk assessment of emerging pollutants — metals, ionic liquids, metal nanoparticles, pharmaceuticals, endocrine disrupting chemicals — in soils and aquatic systems. She investigated their impacts on different levels of complexity, i.e. in vitro cytotoxicity studies, single species studies (algae, bacteria, plants and soil invertebrates) up to a community level (soil and freshwater microbial communities).

Further areas focused on are bioavailability of compounds as well as mixture toxicity assessment. Her research career was developed through different academic, NGO and industry funded projects at the Center for Environmental Research and Sustainable Technologies, University of Bremen, Germany, and the Department of Biological and Environmental Sciences, University of Gothenburg, Sweden.

Between 2012 and 2014, the NERC Centre for Ecology & Hydrology, Wallingford, UK hosted her EU-funded Marie Curie Fellowship and then employed her as an Ecotoxicologist. She was mainly working on EU funded projects (e.g. NanoFATE, NanoFASE, ACEnano, NanoCommons, GRACIOUS, calibrate, SAbyNA) studying fate and toxicity of nanomaterials to improve environmental effect and risk assessment schemes. Between March 2021 and September 2024 she has worked as a scientific officer at the European Chemicals Agency in Helsinki mainly in the capacity of Nanomaterials Project manager.