Somsen's current research interests include compositional and conformational characterization of intact biomacromolecules, bioactivity screening of compounds in complex samples, and metabolite analysis with particular attention for compound chirality. His group built an internationally recognized expertise in the hyphenation of capillary electrophoresis with mass spectrometry and optical spectroscopy for the analysis of pharmaceutical proteins. Somsen is (co)author of over 155 peer-reviewed papers and has an H-index of 34 (Nov 2017).

Current:
• Editor of Journal of Chromatography B.
• Chairman of the Dutch CE users group (KNCV).
• Member of the board of the Working Group Separation Science (KNCV).
• Member of the board of the Society of Microscale Separations and Bioanalysis.
• Member of the organizing committee of the 9th International Symposium on the Separation and Characterization of Natural and Synthetic Macromolecules 2019.

Recent:
• Board member of the NWO Study group Analytical Chemistry.
• Member of the scientific committee of Drug Analysis/PBA 2018.
• Co-chair of the global CESI-MS Symposium 2018.
• Guest editor of Journal of Chromatpgraphy A (2017).
• Chairman of the 33rd International Symposium on Microscale Separations and Bioanalysis (MSB 2017).
• Member of the scientific committee of Recent Developments in Pharmaceutical Analysis 2017.