Miguel Diaz
Senior Programmer Analyst – Mainframe | COBOL | DB2 | CICS | JCL | VSAM | Core Banking | Batch & Online | Production Support
- Role
- Software Engineer Lead Mainframe at PNC
- Location
- Springville, AL, US
- LinkedIn followers
- 500 followers
About Miguel Diaz
Senior mainframe programmer analyst with 15+ years supporting and enhancing core banking and financial services systems. Hands-on experience building and maintaining COBOL applications with DB2 and CICS across batch and online processing, plus strong production support discipline (triage, root cause analysis, defect remediation, and release validation). Known for translating business requirements into stable technical solutions, improving the reliability of critical processing, and producing clear technical documentation in regulated environments.Proficient in managing the full transaction lifecycle, from CICS/IMS real-time processing to JCL/DB2 nightly batch settlement and General Ledger integration.Technical Core: COBOL, DB2, CICS, JCL, VSAM, Batch Scheduling/Operations, and end-to-end SDLC.Banking Domain Expertise:Deposits: Checking, Savings, CDs, IRAs, and Money Market Accounts.Lending: Mortgages, Auto Loans, Personal/Installment Loans, and HELOC.Cards & Credit: Credit/Debit Card processing, Overdrafts, and Revolving Lines of Credit.Payments & Operations: ACH, EFT, Wire Transfers (Fedwire/SWIFT), Bill Pay, General Ledger (GL) integration, and Interest Accrual Engines. Supported core banking platforms 24/7.
Experience
Software Engineer Lead Mainframe
Apr 2026 — Present · Birmingham, AL, US
Education
Atlantis University
Bachelor's degree, Computer Science
2017 — 2018
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