Launched in 2002, EC&M 's Top 40 Design Firms listing initially tracked the financial data and market information of the biggest players in the field. However, until recently, the list was based on overall design services revenue. In 2012, we fulfilled our long-term mission to showcase the top players in the design field based on electrical design revenue only. As a result, this brought the article more in line with the spirit of our magazine.

We'd like to congratulate the firms that made this elite list in 2013 and show our appreciation for their ongoing commitment to provide an important insider's view of the electrical design business. To read prior Top 40 articles in their entirety, please click on the cover thumbnails below.

If your electrical design division or company is one of the biggest in the nation, we'd like to hear from you. Please email Managing Editor Ellon Parson at ellen.parson@penton.com if you would like to participate in future surveys.