Jan is currently on trial as Concertmaster at the Royal Opera House, Covent Garden, where he already holds the position of Section Principal of the second violins. For the 2019/20 season there, Jan will lead productions of  Beethoven’s Fidelio conducted by Music Director Antonio Pappano, as well as Tchaikovsky’s Sleeping Beauty and Swan Lake.

He is also Concertmaster of the Orchestra of St John’s and is often invited to guest-lead other orchestras, including the Scottish Chamber Orchestra, the Paris Chamber Orchestra, Britten Sinfonia, Musikkollegium Winterthur in Switzerland as well as the Academy of St. Martin in the Fields.