ZOS Technical DeveloperLocation: Lisle, Illinois (Onsite, no remote)Job Description:5–8+ years of experience in mainframe development.Strong proficiency in COBOL, JCL, CICS, VSAM, DB2, IMS, REXX.Analyze business and technical requirements to create scalable solutions.Perform coding, testing, debugging, and documentation of programsNice to have skills: Optimize application performance and ensure system reliability. Conduct code reviews and ensure adherence to best practices and security standards. Collaborate with QA, business analysts, and project managers for successful delivery.