Contractor Services Center
The Contract Services Division administers MDOT's contracting processes, including contractor prequalification, bid letting, contract awards, and contractor payments. Information available here includes prequalification of construction contractors, project advertisements, bid information and results, contractor payment information, and much more. Contact Us
The state of Michigan will begin upgrading its financial and business systems starting June 30. The new SIGMA Vendor Self-Service (VSS) system will replace Contract & Payment Express (C&PE) and Buy4Michigan. SIGMA VSS will improve how we work with vendors, payees, and grantees. Please visit www.michigan.gov/SIGMAVSS for important dates and transition information, including actions you may need to take.