Specifications include, but are not limited to: Installation, customization, and implementation of IBM’s IMS software and allied system software to bring the z/OS mainframe software versions to the current software levels; ; Examination of the third party software versions on the CITY’s primary mainframe to determine if the versions are compatible with z/OS v2.4, apply fixes or upgrades as needed to bring the software versions to the proper level; and 4. System programmer services in support of the z/OS environment in three (3) phases as listed below. The CONTRACTOR shall also provide knowledge transfer to DIT staff for all relevant changes related to system upgrades and processes. ; 1. Research Preventive Service Planning (PSP) buckets; 2. Review Program Directory, Installation Guide and co-existence maintenance for other sub-systems; 3. Installation and configuration of IMS including the application of any outstanding maintenance; 4. Execute Initial Verification Procedures (IVPs) and conduct user testing of IMS; 5. Document any relevant IMS system and functional changes; 6. Implementation of IMS.