Rob Vermeulen is teacher choral conducting at ArtEZ in Arnhem and at Utrechts Conservatorium of Utrecht School of the Arts. Also, he is conductor of Musica Vocale in Wageningen and the Eastern Netherlands Chamber Choir in Doetinchem. With these chamber choirs, he performs a capella repertoire but also large works with orchestra such as the Beethoven Missa Solemnis, Les Noces by Stravinsky in cooperation with Introdans and Monteverdi's Maria Vespers.
He also conducts the Bach Choir Nijmegen, with which he performs the main oratorio repertoire, together with the Gelders Orchestra. Moreover, he is conductor and artistic leader of the 20th Century Project Orchestra, with which he performs the main large post-1900 orchestral works, such as works by Shostakovich, Bártok and Stravinsky.
From 1990 until 2008, he was artistic leader of Utrecht Project Choir, with which he performed large a capella works, such as by Rachmaninov, Grechaninov and Schnittke. From 1993-2010 he led the Dutch Concert Choir, with which he worked alongside conductors such as Gergiev, Brüggen, Rosdestvensky, De Waard, Hickox and many others.
Since 2003, he has been the permanent guest at the Al Bustan Festival in Lebanon. There, in 2011, he performed the Concert for Choir by Alfred Schnittke. Since 2006, he has been regularly working with ensemble de Ereprijs, yearly leading the Young Composers Meeting.