Dr Hellmann studied biology at the Technical University in Kaiserslautern, Germany. He started his PhD thesis in the group of Prof. Wolf Bernd Frommer in Berlin, Germany, on sugar and amino acid signal transduction, and received his PhD degree in 1997. He went for two years to the group of Prof. Mark Estelle, University of Texas at Austin, USA, as a postdoctoral researcher to work on auxin and plant E3 ligases. In 2002 he started his own group as an Assistant Professor at the Freie University in Berlin, Germany, with a focus on plant E3 ligases as well as on steps that control vitamin B6 biosynthesis in plants. In 2007 he moved to Washington State University, Pullman, USA, and was promoted to Associate Professor in 2013. He has published more than 45 articles reaching an h-index of 28.