The US weekly magazine Engineering News-Record (ENR) is generally recognized as the leading trade journal for the construction industry and regularly publishes industry-relevant data, analyses, and opinions from all over the world. The ENR selects the largest construction companies and planning offices in the USA and worldwide to feature in its famous annual lists.

The lists are based on the annual domestic and international turnover of the companies and are divided into specific market categories. The ENR Sourcebook also provides an in-depth and detailed overview based on a ranking of the submarket leaders. 

Drees & Sommer has featured in these prestigious lists since 2021.