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eOffer/eMod
eOffer/eMod is a tool to submit Contract Offers and Contract Modification requests to GSA Federal Acquisition Service online.

Before You Begin - eMod Checklist


  1. Do you know your DUNS number and contract number?
  2. Are you an Authorized Negotiator on the contract?
  3. MAS Modification Guidance

1. Do you know your DUNS number and contract number?

You must know your DUNS number and contract number when you access the system.

2. Are you an Authorized Negotiator on the contract?

You must be listed in the contract as an Authorized Negotiator.

If you are not listed, you may contact your contracting officer or have someone from your company that already has access to eMod add you to the negotiators list.

3. MAS Modification Guidance

Please visit GSA.gov/MASModGuide to download a copy of the MAS Modification Guidance and required templates.