Tech Lead - Infrastructure Services N 4C

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System Engineer – AS400 is responsible for the day-to-day administration, availability and performance of THE CLIENT's IBM i (AS400) platform, which hosts business-critical JD Edwards and Lawson workloads. The role covers operating system and DB2 administration, LPAR management, and the supporting Brocade SAN fabric. This position is being established in India as a designated back-up to the single AS400 resource THE CLIENT retains in the United States, providing continuity of coverage for the platform through its remaining lifecycle. Management of the AS400 operating system and DB2 database environment. Support and administration of three production instances of JD Edwards running on AS400. Support and administration of multiple JD Edwards development environments. Management of LPARs (logical partitions) across the IBM Power estate. Management of the Brocade switches and SAN fabric supporting the AS400 stack. Support and administration of the Lawson application, which is also hosted on AS400. Act as back-up to the US-based AS400 resource, ensuring continuity of platform coverage. The successful candidate will operate within the following THE CLIENT infrastructure landscape: Compute & virtualisation: VMware vCenter, Nutanix, hyperconverged compute (Dell VxRail), Dell PowerEdge, IBM Power / IBM i (LPARs). Total server estate of approximately 371 servers. Storage & backup: IBM storage array, Amazon S3 / Wasabi, Veeam, IBM SAN fabric (Brocade on the AS400 stack), and KeepIt for Microsoft 365 backup. Database: Microsoft SQL Server and AS400 DB2, including one production MS SQL Always On cluster across three nodes, generating approximately 10 incidents per month. Cloud: AWS (Redshift) and Azure (Azure SQL Server). Service management: ServiceNow Zurich release, with limited CMDB and CI maturity at present. Documentation: Knowledge management and standard operating procedures are currently very limited on the infrastructure side. Engagement Context & Platform Roadmap Candidates should be aware that the AS400 platform is on a defined decommissioning path: THE CLIENT retains one AS400 resource in the US and has requested a back-up resource be hired in India — this role. By end of 2027, two of the three JD Edwards instances will be migrated to Oracle Cloud Infrastructure (OCI) and managed by Oracle. The remaining instance is the Protein instance, located in Alabama. Lawson will be migrated to Microsoft Dynamics. Given the limited existing knowledge management and SOP coverage on the infrastructure side, a meaningful part of this role will involve documenting the environment to support a clean transition and eventual