Client is seeking a Senior Mainframe Developer & Support Specialist with strong IBM z/OS experience to design, develop, enhance, and support mission-critical mainframe applications. This role requires deep hands-on experience with COBOL, DB2, JCL, and CICS, along with production support, incident management, batch scheduling, and troubleshooting in enterprise mainframe environments.
Core Responsibilities
- Design, code, test, and deploy mainframe applications using COBOL, JCL, and DB2.
- Develop and maintain online CICS and batch processing systems.
- Work with VSAM files, DB2 databases, DB2 stored procedures, and SORT utilities.
- Support application modernization and system upgrade initiatives as needed.
- Provide L2/L3 production support for mainframe applications.
- Troubleshoot and resolve batch failures, abends, data inconsistencies, and production issues.
- Support Tivoli Workload Scheduler batch job scheduling and monitoring.
- Perform root cause analysis and implement preventive solutions.
- Handle incident, problem, and change management processes.
- Work with IBM MQ for message-based integrations.
- Support CICS transaction flows and troubleshoot transaction-related issues.
- Collaborate with distributed systems teams for end-to-end interface support.
- Use code management tools such as LCM or equivalent tools for version control, migration, and deployment.
- Manage code promotion across DEV, QA, and PROD environments.
- Maintain documentation and support audit compliance.
- Provide technical guidance and mentoring to junior team members.
- Participate in release planning, code reviews, and design discussions.
Essential Qualifications, Skills, and Technologies
- 8+ years of experience in Mainframe Development & Support.
- Strong hands-on experience with IBM Mainframe z/OS environments.
- COBOL programming experience.
- DB2 and DB2 stored procedure experience.
- JCL experience.
- CICS experience.
- VSAM file handling experience.
- Tivoli Workload Scheduler experience.
- IBM MQ experience.
- SORT utility experience.
- LCM or equivalent code management tool experience.
- Strong production support experience.
- Experience troubleshooting complex system issues.
- Experience supporting incident, problem, and change management processes.
- Bachelor's degree in Computer Science, Information Systems, or related field.
Preferred Skills or Experience
- Experience with Hogan Banking System.
- Exposure to mainframe modernization initiatives.
- Knowledge of Agile/Scrum methodologies.
- Automation or scripting experience for batch or monitoring improvements.
- Experience in a 24/7 production support model.
- Experience with ZWDYL or similar framework/tools.
Work Details
- Remote role.
- On-call rotation required.
- Support required for batch cycles and critical production windows.
Nesco Resource offers a comprehensive benefits package for our associates, which includes a MEC (Minimum Essential Coverage) plan that encompasses Medical, Vision, Dental, 401K, and EAP (Employee Assistance Program) services.
Nesco Resource provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.
