Simon works with a wide range of musicians, vocalists and other songwriters in collaboration projects. The material is recorded and mixed in his home studio in Wadenswil, Switzerland. Some of the mixed songs are available at SoundCloud:
In order to control the songwriting, recording and mixing process Simon has developed a series of control process checklists. These two song check lists help control every step of the whole process, moving from rough raw material to the final finished product. They use a series of "check-points" as part of the quality control process.