The Department of Administrative and Financial Services (Department) is seeking Independent Verification and Validation services for the Medicaid Enterprise System (MES) Health PAS (HPAS) Modernization Process on behalf of the Maine Department of Health and Human Services (DHHS) as defined in this Request for Proposals (RFP) document. This document provides instructions for submitting proposals, the procedure and criteria by which the awarded Bidder will be selected, and the contractual terms which will govern the relationship between the State of Maine (State) and the awarded Bidder. In support of its significant MES modernization effort, the State of Maine DHHS Office of MaineCare Services (OMS) is seeking Independent Verification and Validation (IV&V) services to review and monitor the system design, development, and implementation work to be completed by the implementing vendor, Gainwell Technologies, and to make recommendations for project improvement opportunities as appropriate. OMS has developed a modernization roadmap for the existing Medicaid claims system known as the Maine Integrated Health Management Solution (“MIHMS”). The roadmap includes a comprehensive, significant modernization of the existing legacy MIHMS platform. The upgrade includes data architecture impacts (tables and entities), version upgrades (impacting system functional attributes) to account for the fact that Maine’s current 4.8 version is many versions behind the version to which we are upgrading, remediation of Maine custom code in the target new version 5.x and impacts to surrounding MIHMS ecosystem system components. The modernization upgrade is projected to be a 24-month effort from initiation through production implementation. The core business objectives associated with this upgrade are: Confidence in the stability, security, and sustainability of MIHMS to meet mission-critical business needs on an ongoing basis; Enhanced internal OMS staff user experience when interacting with the MIHMS platform; Retain Maine custom functionality, either through core 5.x code or carrying forward customization into 5.x; and Address existing security risks and ADA accessibility compliance gaps existing in the current version.