Social psychologist, games designer, storyteller, filmmaker. Specializes in games about change, sustainability, economy and money. Founder of Sangreal Games.

Expert in wargame design, strategy simulations, civil-military exercises. Stolk, Goldsworthy & Associates.

Change management, social safety, education. Owns the network organisation Toi Toi.

Game designer (GRUNN), and lecturer didactics at Hanze Hogeschool Groningen.

Conflict Simulations, AI and ChatGPT expert.