Jos Vermunt studied choral conducting at the Utrecht Conservatory with Reinier Wakelkamp, and orchestral conducting at the Royal Conservatoire in The Hague with Lucas Vis. In 1988 and 1989 he was selected to participate in the conducting class of maestro gennady Rozhdestvensky at the Accademia Musicale Chigiana in Siena,  Italy.
 
Jos conducts the Residentie Bach Ensembles (Residentie Kamerkoor, Residentie Bachkoor and Residentie Bachorkest) and the Toonkunstkoor Utrecht. Additionally, he performs as the guest conductor with the Residentie Orkest The Hague and the Brabants Orkest. He conducted premieres of works by Willem Wander van Nieuwkerk, Peter-Jan Wagemans, Christian Ernst Graf, Frans van Doorn and Joost Kleppe.

Jos Vermunt conducted at numerous royal occasions, such as the funeral services of Prince Claus, Queen Juliana and Prince Bernhard, the wedding service of Prince Constantijn and Princess Laurentien, and the christening services of the Princesses Alexia and Ariane. He received a royal decoration from HRH Queen Beatrix in 2006.

Jos Vermunt is a principal subject teacher of choral conducting at the Conservatorium van Amsterdam and the Royal Conservatoire of The Hague.