Introducing TED: Our new Transportation Enterprise Data program. This is a self-service resource for all things CTDOT. In a couple of clicks you’ll be able to get data and maps of Connecticut’s roadways, traffic volumes, crash data, and more. It’s a one stop shop for geospatial data. Visit us today!

Consultant Selection Office
The Consultant Selection Office (CSO), in coordination with the Commissioner, manages and directs all activities regarding the solicitation and selection of consultant firms for all Department Bureaus.  The CSO also coordinates the annual consultant prequalification process.
Consultant Selection Office 
Office of the Commissioner
Connecticut Department of Transportation
Telephone: (860)594-3017
Fax: (860)594-3491
or email to:
The Consultant Selection Office is now using electronic (email) notifications.  Please ensure emails from & are not automatically marked as spam by your email system.

Bipartisan Infrastructure Bill Implementation Overview Presentation


RECENT SELECTION REVISION !!! -    Beginning May 1, 2021, the consideration of Recent Selection criteria changed to the following:

  • The ‘look back’ window is 12 months.
  • A firm may be selected for 2 assignments within a 12 month rolling period.
  • A firm may only be selected for one assignment in the same prequalification category in a 6 month period.
  • Recent Selection is waived for the following conditions:
    1. Assignments which fall under the Construction Engineering and Inspection (Rails) or Construction Engineering and Inspection (Facilities) prequalification categories
    2. Assignments advertised via legal notice
    3. If less than the minimum number of firms statutorily required to be interviewed submit proposals in response to a solicitation.
VOLUME DETERMINATION REVISIONS -   Beginning October 1, 2021 the volume calculation was changed to the following:
  • Calculation of a firms volume percentage is based on paid invoices over the last 3 years.
  • Solicitations advertised via legal notice will not be held to the 5% volume capacity.  A firms volume will be a consideration during the final selection process



Active Solicitations for Consultant Services


  •    CSO #2378 - Task Order Historic and Archaeological Support Services
  •   CSO #2379Consultant Liaison Services for the Transportation Alternatives, Surface Transportation Block Grant and Other Programs
  • CSO #2380 - Task Order Engineering Services - Project Development Unit
  •   CSO #2383 - Construction Engineering and Inspection Services for Project No. 0173-0511
  •   CSO #2387 - Consultant Liaison Engineering Services for Traffic Engineering - revised due date


Past Consultant Selections - 1.10.22

Annual Consultant Prequalification Information for 2022  Closed - Applications are no longer accepted - Submittal deadline for the 2022 calendar year was October 15, 2021


SBE Directory of firms.  (use Class 0600)

Affidavits     OPM Website

CSO 255 Submittal Form - Jan 2016 (word)