As 24 years old he become a professorship at the University of music in Munich. Now he teaches at the University of music in Basel, Switzerland.
Roman played his solo appearances as well as duos with Anne-Sophie Mutter in Europe, Asia, USA and Canada in concert halls such as Carnegie Hall, Berlin Philharmonic Hall, Kennedy Center, Barbican Center, Smetana Hall, Musikverein Hall in Vienna, etc. With orchestras such as German Symphony Orchestra Berlin, Camerata Moscov, SWR Radio Symphony Orchestra Stuttgart, Virtuosi di Kuhmo, Munich Chamber Orchesra, Boston Symphony Orchestra, Czech Philharmonic Orchestra, London Symphony Orchestra, National Symphony Orchestra of Washington etc…, at the music festivals such as Luzern Festival, Rheingau Festival, Verbier Festival, Mecklenburg Vorpommern Festival, Yehudi Menuhin Festival, Prague Spring etc…
He did appear also in the TV-shows, among others at „Stars von morgen“ or „Sunday nights classics“ in duo with Maxim Vengerov.
By the initiative of Anne-Sophie Mutter, the contemporary composer personalities such as Sir Andre Previn, Wolfgang Rihm, Sebastian Currier and Krzystof Penderecki are composing new duos for violin and double bass. In 2007, Anne-Sophie Mutter and Roman premiered the Sir Andre Previns double concerto for violin and bass in Boston under the condaction of composer himself. In 2011, they premiered the W. Rihm and K. Penderecki duos and in 2013 the S. Currier duo.