​The Wisconsin eSupplier Portal for Bidders ( was officially launched on September 12, 2017 by the State of Wisconsin's Department of Administration. Here are a few helpful hints on how to make the system work for you:


Registration in VendorNet vs eSupplier

Even if you were registered in VendorNet, it is still necessary to complete your registration in eSupplier before you will be able to update your eSupplier profile, add or change the NIGP codes associated with your account, or respond to a solicitation.

Locating Registration Instructions

Go to and click on the "Enter Bidder Site" button on the right side of the screen to find the eSupplier Bidder Homepage. Registration instructions can be accessed by clicking the link titled, "Need help registering as a bidder?" located directly under the "Sign In" button. Alternatively, you can look at the box titled FAQs (or Frequently Asked Questions) on the lower, right side of your screen. These FAQs link to a variety of Job Aids that will help you navigate the eSupplier Portal for Bidders.

Transferring NIGP Codes

If you had an active VendorNet account at the time the eSupplier Portal for Bidders was launched and you would like to automatically transfer all of your NIGP codes to the new system, make sure you register in eSupplier using the same email address you had in VendorNet. If you need to update your email address in eSupplier, you will be able to do so after registration. If your VendorNet account was inactive or if you no longer have access to the email address that was registered in VendorNet, you will not be able to automatically transfer your NIGP codes, but you can easily add them to your eSupplier profile.

Bidders Located Outside the U.S.

If you are a bidder located outside the U.S., you may have experienced issues registering for a WAMS account as international addresses are not supported. You may leave the address information empty on the WAMS registration page since these are not required fields (though you will need to click the box for "Mailing Address is the same as Residence Address" to complete your registration). When you complete your registration in eSupplier, you will be able to add your address information directly into your eSupplier account.

Training Materials & Resources

Interactive Training Video

The interactive training video will provide an overview of the Wisconsin eSupplier Portal for Bidders, provide an explanation of WAMS IDs, show you how to navigate the bidder homepage and set up your eSupplier profile, and provide an overview of the resources available to you.

Job Aids

You can access the Job Aids by going to, clicking on the "Enter Bidder Site" button on the right side of the screen to get to the Bidder Homepage. On the lower, right side of the page you'll find the FAQs, which link to a variety of helpful guides answering common questions, such as:

  • How do I use the Bidder Home Page?
  • How do I update my Bidder information?
  • How do I register as a Bidder?
  • How do I search for Solicitations?
  • How do I respond to an Event?

eSupplier Communications

An archive of emails and letters that have been sent to bidders regarding this transition process is available through the link above or by going to and navigating to General Procurement > Strategic Sourcing.

Who to Contact for Support

Technical Questions

Technical questions about the eSupplier site can be addressed by the STAR Support team:

(844) WIS-STAR (947-7827)

General Procurement Questions

General procurement questions should be directed to the State Bureau of Procurement:

(608) 264-7897 or (800) 482-7813 (US only)