Sonja Lieveld
Office Manager

Sonja Lieveld has been working as Office Manager at Düsseldorf Competition Economics since August 2026. In this role, she is responsible for the company’s organisational and administrative matters and supports the team in an administrative capacity.
As a graduate in communications (WAK), Sonja has more than 25 years’ professional experience in the planning, coordination and implementation of marketing projects for companies across a wide range of sectors.