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
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.


  • 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 -   Calculation of a firms volume percentage is based on invoices paid over the last 3 years and incorporated into the selection scoring process through a volume adjustment factor which is added to the proposal score, prior to determining the shortlist of firms. 
  • 5.1.23 Consultant firms volume adjustment factors
    • NOTE: Firms not on this list will be given the maximum adjustment per complexity category (low-15; medium-10; high-5).
    • Volume Adjustment Range Chart

Consultant Selection Process Scoring Revisions Presentation 2.18.22

Solicitation Look Ahead 5.18.23

 Active Solicitations for Consultant Services
  •   CSO #2414 - Task Order Servicing CTDOT Project Management Solution, "COMPASS"
  •   CSO #2417 - New Haven Line Railroad Bridge Inspection - Revised
  •   CSO #2420 - Construction Engineering & Inspection for Project 156-181 - revised
  •   CSO #2422 - Construction Engineering & Inspection for Project 173-497


Annual Consultant Prequalification Information for 2023 is CLOSED - Applications are no longer being accepted - Submittal deadline for the 2023 calendar year was October 17, 2022

SBE Directory of firms.  (use Class 0600)

Affidavits     OPM Website

CSO 255 Submittal Form - June 2022 (word)