After his Master Business/Managerial Econometrics at the Vrije Universiteit (Free University of Amsterdam), he started working in business.

Spee has worked as a manager at companies such as Procter & Gamble, Philips, Rothmans and Alvarez & Marsal.

In 2012 Spee became CEO of Endemol, the biggest independent TV producer in the world.

Just Spee is a member of the Supervisory Boards of various companies and civil society organizations such as the OLVG hospital (Amsterdam) and UNICEF Netherlands.

Spee had already come into contact with football during his career in business as a member of the Supervisory Board of the Eredivisie Media & Marketing CV.