All correspondence must be made through the Vendor Portal. Specifications include, but are not limited to: The State of Delaware (State), Department of Health and Social Services (Department or DHSS) wishes to sign a contract for professional services with a primary contractor (Contractor). This is a Request for Proposal (RFP) for maintenance and support services (M&S) for the Delaware Child Support System (DECSS) issued by the Division of Child Support Services (DCSS). The procurement will result in a single source award to a Contractor (who may also be referred to as Vendor) that shall be wholly responsible for maintaining and operating DECSS. The Contractor must demonstrate knowledge and experience providing M&S support for an integrated Social Services system. The Contractor will maintain and enhance the DECSS system to include systems, application, and operations support services in the Department’s IT environments. This includes but is not limited to: responsibility for software development to support operational compliance with State or Federal regulations, defect corrections, feature function enhancements, operational quality enhancements, Commercial Off The Shelf (COTS) product version and patch management and upgrades, incident management, problem management, performance management, capacity management, day to day management of hardware and software configurations, web portal support, system security compliance, job scheduling, output print services provider oversight and integration support, transmission management, and the support and administration of infrastructure third party COTS products supporting DECSS.