The Department of Health and Human Services, specifically the Indian Health Service (IHS), intends to modify an existing contract with Guidehouse, Inc. to provide additional change management resources for G-Invoicing and Audit Work Support. This procurement aims to enhance support for G-Invoicing activities within the Division of Systems, Review Procedures, which includes managing standard operating procedures, facilitating training, and addressing walkthrough requests. The urgency of this requirement is underscored by the Treasury's mandated go-live date of September 2025, making the specialized knowledge of Guidehouse critical to avoid delays and additional costs associated with onboarding a new contractor. Interested firms may submit capability statements with pricing information by January 2, 2025, at 3:00 PM Eastern Time to Christopher McGucken at christopher.mcgucken@ihs.gov, with the total estimated cost for this service being $249,000.00.