Senior JDA MMS / AS400 Consultant

About the Role A well-established IT staffing and consulting firm is seeking an experienced Senior JDA MMS / AS400 Consultant to support, enhance, and optimize the JDA Merchandise Management System (MMS) on the IBM i (AS400) platform for a leading retail organization. This is a long-term engagement with a prominent retail client, offering the opportunity to work across merchandising, supply chain, finance, and IT functions in a dynamic, large-scale environment. What You'll Do Provide deep functional and technical expertise in JDA MMS — covering Items, Pricing, Promotions, Markdowns, Inventory, and Sales Audit modules. Support and optimize AS400/IBM i batch processing, troubleshoot system issues, and monitor platform performance. Lead system enhancements, configurations, and integrations with POS, E-commerce, WMS, and Reporting Platforms . Collaborate cross-functionally with Merchandising, Supply Chain, Finance, and IT teams for requirements gathering, testing, and production support. Ensure data integrity, auditability, and accuracy across merchandising and financial transactions. Drive troubleshooting efforts, manage upgrades, and provide ongoing production support in a large retail environment. What We're Looking For Required: 7+ years of hands-on experience with JDA MMS on IBM i (AS400) . 10–20 years of overall IT/system integration experience within retail or similar industries. Strong knowledge of Retail Merchandising processes . Proficiency in RPG/CL, SQL, Batch Jobs , and system integrations on IBM i. Proven ability to lead troubleshooting, upgrades, and production support in large retail environments. Hands-on experience with integrations across POS, E-commerce, WMS, and Reporting platforms. Experience with requirements gathering, testing, and production support in cross-functional team settings (Merchandising, Supply Chain, Finance, IT). Demonstrated commitment to data integrity, auditability, and accurate financial/merchandising transactions. Ability to be onsite in Phoenix, AZ three days per week (Tuesday, Wednesday, and Thursday). Compensation & Benefits Pay Rate: $70–$75 per hour (W2) Engagement through W2 employment arrangement Location Phoenix, AZ — Hybrid on-site (3 days/week: Tuesday, Wednesday & Thursday) This is not a fully remote role; consistent onsite presence at the client location is required.