Consultant Services

The South Dakota Department of Transportation uses the services of consulting engineers, architects, surveyors, and other specialists to perform work supplementing department forces or to provide services that the department is not staffed or equipped to do. Use of consultants allows the Department to accomplish our mission in an effective and timely way. Included on this page, you will find a variety of information including forms, guidelines, and other resources to help you provide transportation and consulting-related services which meet the guidelines of the SDDOT.

SDDOT maintains a consultant prequalification process in accordance with the Code of Federal Regulations 23 CFR Part 172. Every three years, SDDOT solicits interest from consultants for the prequalification process and addition to the retainer. Services are grouped into specific categories of work.

For specific projects, SDDOT requires consultants to be pre-qualified. For work not covered under any prequalification work type, consultants may utilize sub-consultants, at their discretion, with approval from SDDOT. PreQualification is not a guarantee of work. SDDOT is not obligated to award a contract or complete a project under this program.

Information for 2026-2028 Consultant Retainer Period

Program work types
- Categories Defined
Retainer list application resources - Step 1
Retainer list selection resources - Step 2

GENERAL TIMELINE OF RETAINER PROCESS

Year 1

Interim Years 2 and 3

CURRENT LIST OF CONSULTANTS

By Consultant
By Category
- Local
- State

Note: If the information listed for the specific Pre-Qualification Program work type is incorrect, please send an email to: tiffany.hanisch@state.sd.us

Disclaimer: Any outside entity relying on SDDOT’s Pre-Qualification Program lists to determine whether a firm is ‘qualified’ to perform that entity’s work should perform its own due diligence to determine and confirm the qualifications of any listed firm.