The Drees & Sommer corporate philosophy consists of eight statements that express how we think, how we work together, and what sets us apart.



Diversity at Drees & Sommer

Right mix. Real value. What’s right for our projects is also right for the people who work on them. Our goal is to fill every position with a person who is qualifed for it through their dedication and ability. This results in teams that are highly diverse. And together, they achieve the best results – they enjoy their work and take pleasure in our clients’ success.

It’s all about the right mix: Click here to download the Drees & Sommer Group Diversity statement.




Drees & Sommer has been certified in accordance with the internationally recognized quality management standard ISO 9001 since 1995.

Our occupational health and safety policy provides the framework for measures to ensure employee safety. We have established an Occupational Health & Safety Management System (OH&SMS) to ensure overall coordination of all relevant elements and measures. The OH&SMS is based on the internationally recognized ISO 45001 standard, but is not currently certified. Certification of the Drees & Sommer system is scheduled for November 2021.