Business Center

Supplier Information

Suppliers wanting to business with CDOT can review each tab below to understand how CDOT buys goods and services, and learn about various resources available.

Looking for bridge and highway construction bids?
Visit the Bid Express website.

Needing help registering on the SuSS Portal?
Contact the Help Desk at 303-757-9848 or

How We Buy

Purchases of goods and personal services (janitorial and office supplies, heavy tow service, variable message signs, parts, and maintenance, etc.) must comply with the Procurement Code in the Colorado Revised Statutes (C.R.S.) and Procurement Rules. Certain professional services such as; architecture, engineering, professional land surveying, landscape architecture, industrial hygiene (C.R.S. 24-101-105, C.R.S. 24-30-1402)  are excluded from the Procurement Code.  Some services are procured through both CDOT Procurement and Contracts and Engineering (highway and bridge construction).  Visit Connec2DOT's website to see an example of how certain items are purchased.

CDOT strongly encourages the utilization of small businesses, including businesses owned by minorities, women, and veterans when purchasing goods and services with lower dollar values (discretionary purchases).  Procurement seeks to provide all businesses regardless of size or ownership opportunity to compete for CDOT contracts.  

Disadvantaged Business Enterprise (DBE) and Emerging Small Business (ESB) certifications are recognized in bridge and highway construction and generally are not considered in procurement. Contact the Civil Rights Office for more information on these certifications.

The Procurement Code sets a goal for Colorado-based Service-Disabled Veteran-Owned Small Businesses (SDVOSB) certified through the U.S. Department of Veterans Affairs.   

Review the information in the tabs below to understand how we purchase goods and services.

When goods or services are needed, regardless of dollar amount, CDOT first considers State Price Agreements (managed by the State Purchasing & Contracts Office) and other cooperative agreements (CDOT Cooperative Purchasing Agreements, The Governors' Office of Information Technology Enterprise Agreements , MAPO Cooperative Agreements).  Suppliers may contact the managers of agreements to understand contract terms and future bid opportunities. 

The decision or choice of supplier for discretionary purchases (goods less than $10,000 and services less than $25,000) is primarily through CDOT employees who end users of goods, materials, and equipment, and/or the program managers responsible for the goods or services being purchased.  

It can be challenging to find who these individuals are within CDOT, and a variety of marketing and networking approaches may be needed to make your business known to the right buyers.  Consider attending the Day at the DOT to meet potential customers.    

When no price or cooperative agreements are available, and when the anticipated cost is greater than $10,000 for goods or $25,000 for services, CDOT publishes competitive bids.  All goods and services bids are published on the Supplier Self-Service (SuSS) Portal. View open bid opportunities.  SuSS Portal registration is not required to view this list, but registration is required to respond to bid opportunities.  

Suppliers interested in submitting bid responses must register immediately to ensure a responsive bid, and should validate registration no later than 48 hours before bid closing. 

All suppliers must submit bid responses on the SuSS Portal.  Paper bids are not accepted.

REGISTER on the SuSS Portal —for new suppliers wanting to respond to goods and services solicitations  

VIEW & RESPOND to Open Bids —for registered suppliers on the SuSS Portal

Bid Types
Type Basis for Award
Documented Quote (DQ) Lowest Bid OR Qualifications then Lowest Bid
Information for Bid (IFB) Lowest Bid
2-Step Information for Bid Qualifications then Lowest Bid
Request for Proposal (RFP) Best Solution and Most Advantageous to CDOT
Swipe table to see more content

Pre-Bid Response Steps

  1. Register in the SuSS Portal.
  2. Setup the supplier account.
  3. Validate pre-qualification status.
    This can be confirmed in the pre-qualification tab on the main supplier login screen.  If there is NO current pre-qualification date, a pre-qualification RFx response must be submitted.

Further assistance for suppliers:

  • Connect2DOT is a partnership with CDOT and the Small Business Development Center (SBDC) network. It assists businesses with consulting, training, technical support, outreach and events. See Connect2DOT's event calendar, and subscribe to its newsletter.
  • The SuSS Portal Help Desk assists suppliers with online registration, pre-qualification and responding to open solicitations (technical only - attaching response files, etc.). 

SuSS Portal Help

Open Bid Opportunities / Awards

Supplier Self-Service Portal Help Desk: 303-757-9848,  

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