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Local Units of Government

Welcome to SIGMA, the State of Michigan’s business operations system. If you are a local municipality or authority, school district, community college, or university, you are in the right place.


SIGMA provides user-friendly experiences for solicitations or SIGMA Vendor Self Service (VSS) when submitting proposals.


To begin posting solicitations, you will first need to register your account information by clicking the MILogin link. 

Please Note

New requests for access take 3-5 business days to process.

State of Michigan IT Access Control policies require any account that is inactive for more than 90 days to be locked. Please contact the SIGMA Helpdesk for assistance in unlocking your account. Assistance may be obtained by calling 888-734-9749 or by email at

System Availability

The system is available from 8 a.m. - 6 p.m. Monday through Saturday. The system closes nightly for batch processing at 6 p.m.
Bids are synced to the public VSS website every 2 hours during the work day starting at 8 a.m.


Government and Local Entity Actions

  • Municipalities, schools, universities and other local entities that would like to submit a response to a state business opportunity should follow the vendor directions located here.

    You will choose the category of directions based on whether you were previously registered on the Contract & Payment Express (C&PE), Buy4Michigan, or not registered at all.

    • Local entities will need to register their account information in SIGMA MiLogin: to post solicitations in SIGMA.
    • New requests take 3-5 business days to process
    • State of Michigan IT Access Control policies require any account that is inactive for more than 90 days to be locked
    • For registration assistance and guidance, please contact the Vendor Customer Support Center (VCSC) at  or by phone at 888-734-9749
    • Online training information is available
    Check back for additional information and frequent updates.