‘We use our knowledge to the maximum for a healthy and sustainable world’

This is the Valstar Simonis mission because we recognize the necessity to make our society sustainable. We are an independent engineering agency, established in 1948, with a proven track record to provide a fitting and complete design for all engineering aspects.

Our enthusiastic team of consultants and engineers operate from five locations in the Netherlands and delivers tailor-made solutions for all services in the field of energy, sustainability and safety in and around buildings. We stimulate integral design (BIM) and sustainable solutions (BREEAM). Our expertise; hospitals, schools, theaters, retail, laboratories, universities, offices, datacenters.

We are happy to assist you with our knowledge and energy!


Valstar Simonis BV
Veraartlaan 4, 2288 GM Rijswijk
The Netherlands
+31 (0)70 307 22 22