Senior Mainframe L3 Support Engineer
7 days ago
Job title: Mainframe Application Developer-L3
Work Location with Zip code: Richardson, TX 75082 OR Baskin Ridge ,NJ ,Tampa FL
Duration of the project: 6 Months
• Education Qualification required: BE
Job Description
Mainframe Application Developer (L3 Support - Tech lead)
Need a highly experienced mainframe developer or solution architect with experience leading a team providing Tier 3 support that includes code enhancements, bug fixes, remediation of vulnerabilities, and platform upgrades (z/OS, DB2, IMS, SAS, and Endevor-related tasks). The developer should be able to support Tier 1 and Tier 2 teams who manage daily operations and ensure the system remains stable, available, and functioning 24/7.
This role supports multiple integrated network planning and work administration systems used to plan, provision, dispatch, inventory, and maintain telecom networks. Knowledge of PL/I or Assembler, JCL, REXX, SAS, DB2, IMS, and mainframe compilation flows is required.
Responsibilities
Provide Tier 3 Support for all mainframe OSS applications, including:
• Provide code fixes across PL/I, Assembler, COBOL, SAS, REXX, CLIST, and JCL modules
• Prepare enhancements and minor functional changes
• Identify and remediate vulnerabilities in mainframe modules or JCL flows
• Perform analysis of production issues impacting dispatch, inventory, or planning systems
• Thoroughly test all software changes using approved test suites
• Successfully build and deploy all software changes through Endevor across multiple regions
• Debug and resolve abends using Abend-Aid, Fault Analyzer, or system dumps
• Support DB2 and IMS precompile, bind, and ACBGEN flows as required for code changes
Assist the Tier 2 Support team as needed including:
• Analyzing and responding to end-user or Tier 1/Tier 2 developer questions and tickets
• Administering user access to specific batch flows or applications (as necessary)
• Providing routine system and job stream maintenance
• Maintaining system interfaces between different subsystems
• Ensuring that nightly and weekly cycles complete successfully
• Remediating system overload issues, long-running jobs, or SQL degradation
Requirements
• Minimum 10-15 years of hands-on experience supporting applications on IBM z/OS and leading a team of developers
• Minimum 5-7 years of experience in PL/I or COBOL development
• Strong experience with JCL, PROCs, REXX, CLIST, ISPF, and SDSF
• Solid understanding of DB2 static SQL, precompile, bind, package/plan management
• Experience with IMS (DB + DC), including PSB/DBD/ACB generation flows
• Prior experience with Endevor or similar mainframe source/version management tools
• Ability to analyze load modules, compare source-to-load behavior, and reverse-engineer logic when source is unavailable
Nice to Have
• Experience with telecom OSS / Telecom systems
• Experience with SAS on z/OS (report generation, batch execution)
• Experience with dump reading tools (Abend-Aid, Fault Analyzer)
• Experience in a high-availability, 24/7 operational environment
• Experience integrating applications across IMS, DB2, and distributed platforms
• Familiarity with NDM/Connect:Direct, MQ, SFTP on mainframe
• Experience with ZLinux or z/OS UNIX System Services
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