From a press release issued by KTM:

Thierry van den Bosch is again for KTM
The French Thierry van den Bosch who was active in the World Supersport Championship in 2003 has decided to ride again Supermoto with KTM. Van den Bosch can look back on a successful past as a KTM factory rider: He already won the European and the World Championship on KTM in 2002.

The French is completing the KTM Factory Team with the riders Jürgen Künzel, Boris Chambon, Ivan Lazzerini and Fabrice Lecoanet.

Van den Bosch will ride the complete Supermoto World Championship as well as some selected races in America and France.