Creospan is a subsidiary of Creospan Inc., our parent company, headquartered in Chicago, IL. From our humble beginnings in 1999 – with just a handful of employees and a mission to help our clients leverage emerging web technologies to build next-generation products – technology has changed dramatically, yet our curiosity has remained constant. Our expertise spans across Telecom, Technology, Manufacturing, Ecommerce, Insurance, Banking, Transportation, and Healthcare domains.
To find out more about us, visit our website: www.creospan.com

We are seeking a Mainframe Infrastructure Integration Architect to lead infrastructure readiness and integration for an ACF2 to RACF migration across production, DR, and test environments. The role will focus on z/OS infrastructure, security integration, IPL/fallback readiness, DR validation, and cross-tower issue resolution.
Key Responsibilities
• Lead infrastructure readiness for RACF activation and ACF2-to-RACF migration.
• Validate z/OS parmlib/proclib, IPL, JES2, sysplex, SMF, WLM, RMF, and system exits.
• Assess RACF impacts across USS, TCP/IP,



AT-TLS, certificates, keyrings, z/OSMF, and automation.
• Coordinate started task, service, batch, operations, and automation IDs with the RACF security model.
• Validate impacts to SMS, HSM, catalogs, GDPS, backup/restore, tape, and DR procedures.
• Troubleshoot authorization and infrastructure issues using RACF messages, SMF, JES/TCP/IP/USS logs, and IPCS.
• Define pre/post-IPL, fallback, DR, and cutover validation procedures.
• Review runbooks, implementation plans, RCAs, recovery procedures, and audit evidence.
• Provide infrastructure risk and readiness input for migration go/no-go decisions.

Must-Have Skills
• 15+ years of IBM Z / z/OS infrastructure or systems programming experience.
• Solid expertise in z/OS, Parallel Sysplex, JES2, USS, TCP/IP, storage, automation, and DR.
• Hands-on experience with RACF, preferably ACF2-to-RACF migration/coexistence.
• Knowledge of STARTED,

📌 MAINFRAME INFRASTRUCTURE INTEGRATION ARCHITECT (India)
🏢 Creospan Private
📍 India