Search Maryland DOT's Directory of Certified Firms by entering search terms and clicking Search. You must select at least one certification type.
NEW You can use the Business Description field to search by Keyword based upon the specific types of work performed.
You can use the "Click to Lookup Commodity Codes" tool to search the NAICS codes and select one or more NAICS codes to search for all firms assigned that NAICS code. After adding one or more NAICS codes you have the option to check the boxes to Match any codes with same number code and/or Include any lower level codes of those selected.
Search results may be downloaded to Excel, by clicking the "Download Results to Excel" button after your search results are displayed. To download the full Certification Directory do not enter search criteria, scroll to the bottom of the page and click the "Download Entire Directory to Excel" button.
Click here for Frequently Asked Questions (FAQ).
Click here to view Fully Graduated Firms.
NOTE: This online directory lists firms certified by the Maryland Department of Transportation. Firms that appear in the directory are currently certified and approved to be utilized toward meeting established contract goals in their displayed certification North American Industry Classification System (NAICS) codes. Firms that are noted as “suspended” cannot be utilized for-credit on new contracts until the suspension is removed. For additional details please reference the US DOT regulations.
Click the certification type for contact information and certification details.