Simon was the first person in the Netherlands to develop a management training programme on the use and interpretation of body language. Later on, he became a pioneer in the area of 'connecting communication' (also known as 'nonviolent communication'). He makes this method accessible and usable for managers and professionals.
In his long-standing experience as a presentation coach, Simon increasingly often works with leaders in change trajectories and crisis situations. Since 2012, Simon has been affiliated with 'Speak to Inspire' as a partner. This training agency coaches TED speakers, managers, and entrepreneurs in inspirational speaking.
In addition to this coaching activities, Simon is a comedy writer and TV actor. Under the name 'Groen Brothers', he and his brother David produce comical films and clips. In the Netherlands, for example, he also works for the children's programme 'Het Klokhuis', supported by actors such as Alex Klaassen, Remko Vrijdag, and Ilse Warringa.