Engineering News-Record (ENR) has published another ranking, this time showing the top design firms: ENR Top 500 Design – 2010 (article publication date 5-July 2010). The listing ranks Design firms by their 2009 revenue. MMSA is proud to have provided structural engineering services for 10% of the top 100 design firms listed. We provided our services in the General Building category in markets for the Government, Education, Commercial, Healthcare, Correctional, Multi-unit Residential, Offices, and Medical.