Senior IT Systems Manager and Mainframe Specialist

David Fisk, MBA, CCP, CDP, FLMI, HIA 214-***-**** cell • ***********@*****.*** • LinkedIn Profile

Senior IT Systems Manager and Developer

Senior IT systems management and development professional with over 20 years of progressive experience spanning mainframe architecture, CICS/IMS administration, and enterprise application development across financial services, transportation, defense, and retail sectors. Track record of managing production stability across 2,000+ CICS regions while delivering real-time incident resolution and systems optimization at enterprise scale. Proven ability to lead cross-functional technical initiatives, from IMS-to-DB2 conversions to EDI transaction processing and mainframe-to-web migration, consistently aligning technology delivery with business-critical timelines.

Expertise

Systems Administration: CICS Region Management – IMS Database Administration – Mainframe Production Support – Real-Time Incident Resolution – IPL Validation

Application Development: Enterprise Software Engineering – Legacy System Modernization – Database Conversion Strategy – Batch and Online Systems Development – EDI Transaction Processing

Technical Operations: Abend Diagnostics and Resolution – System Performance Monitoring – DASD Rebalancing and Capacity Planning – Dump Analysis – Region Decommissioning

Project Delivery: Cross-Functional Team Collaboration – Stakeholder Communication – Change and Incident Management – Production Deployment Coordination – Technical Documentation

Leadership: Vendor Relationship Management – Mentorship and Knowledge Transfer – Process Improvement – Workflow Analysis – People-Leader Development

Executive Career Progression

Citibank, Irving, Texas 2020 – 2026

Associate Vice President, C013/CICS Administrator

Global financial services institution operating one of the largest mainframe environments in the banking sector.

•Maintained production stability across 2,000+ CICS regions by serving as primary on-call administrator for day, night, and weekend incident response, delivering real-time, hands-on resolution using CICS DD logs, SAR, and general code debugging.

•Served as lead technical authority on the CICM Fundi product, defining groups, connections, transactions, URI maps, files, TS/TD storage, and all CEDA/CEMT functions across 2,000+ regions.

•Drove resolution for IMS abends by collaborating with users to diagnose root causes and determine corrective actions specific to each LPAR/region, while providing SAAS and Snow reporting to upper management on all active Change/Incident tickets for the CICS/MQ team.

•Developed a Rexx script deployed across all regions to validate that IPLs were successful and complete, reducing manual verification effort and improving system reliability.

•Coordinated cross-team production support with MQ, WebSphere, and Automation (STC, tasks, and scheduling) teams on joint projects and incident resolution, while leading Production-down MIM calls with both technical and non-technical stakeholders.

•Developed and migrated new and updated STCs and procs to support CICS upgrades, and decommissioned sunsetted CICS regions to streamline the production environment.

•Leveraged Omegamon and dump analysis tools, including Abend-Aid, for region monitoring, abend resolution, and problem determination, and conducted research to aid in DASD rebalancing efforts.

•Executed region decommissioning using ADRDSSU to back up user-related and region files, recovering disk space while preserving total recovery capability.

•Held special authorized access to IBM, BMC, DADS, and SDS, opening vendor tickets for CICS problem reporting, CAFC, InterTest, and product bug resolution, and served as the primary point of contact for InterTest issues and SSMF report generation.

•Authored technical documentation for colleagues and end users on resolution tools and standardized procedures, and performed research and analysis for management to determine workflow improvements.

BNSF Railway, Inc., Fort Worth, Texas 2012 – 2020

Senior Systems Developer 2/Mainframe Architect, Waybill Systems

One of North America’s largest freight railroad networks, operating across 28 western U.S. states and three Canadian provinces.

•Led design, coding, testing, and implementation of IMS, DB2, Oracle, CICS, and Natural programs supporting BNSF Railway’s core waybill, coal shipment, and billing applications.

•Built new software changes to the waybill system in response to the COVID-19 impact, adapting both incoming and outgoing EDI information to maintain uninterrupted billing and shipment processing.

•Processed EDI transactions across all types, specializing in transportation-related constructs for 404, 417, and 440 formats, and developed XML-to-Natural and COBOL systems that established automated billing for coal shipments.

•Employed ChangeMan, Remedy ticket system, and Kanban methodology to manage code deployments into the production environment, while leveraging MainView tools to monitor and resolve mqueue and IMS production issues.

Textron, Bell Helicopter, Fort Worth, Texas 2010 – 2012

Software Engineer/Senior Programmer Analyst (Contract)

Aerospace and defense manufacturer specializing in military and commercial rotorcraft platforms.

•Contributed to a critical IMS-to-DB2 conversion initiative, writing both conversion-oriented and permanent production software while developing database designs, JCL procedures, and control members for the CO-OP and MOPS systems.

•Designed, coded, tested, and implemented CICS, IMS, DB2, Oracle, and PL/1 programs, and led the conversion of Fortran to PL/1 on legacy systems, providing 24/7 on-call production support.

•Created and implemented new database segments, programs, and PSBs while performing Panvalet APT maintenance for source code and job-control members.

Neiman Marcus Information Services, Irving, Texas 2009

Software Engineer/Senior Programmer Analyst

Luxury retail corporation operating high-end department stores across the United States.

•Delivered IMS-to-DB2 system conversion by writing conversion-oriented and permanent production software, developing database designs, JCL procedures, and performing Panvalet APT maintenance for the MPS system.

•Designed, coded, tested, and implemented IMS, DB2, and CICS combination programs, including new database segments, programs, and PSBs for the MPS platform.

Army and Air Force Exchange Service, Dallas, Texas 2005 – 2009

Lead Software Engineer/Senior Programmer Analyst

Department of Defense retail and services enterprise serving active military, retirees, and their families worldwide.

•Served as project lead for the WebSphere Conversion application development team, directing the mainframe-to-intranet mqueue migration and earning designation as chief software engineer for the AAI conversion initiative.

•Utilized IMS, DB2, CICS, COBOL, VSAM, TSO, ISPF, JCL, Panvalet, FileAid, Endeavour, Telon, Classic ASP, InterDev, VB6, VBScript, VB.NET (C#), and WebSphere MQ across the full Z/OS 390 suite to support enterprise application modernization.

Education

Master of Business Administration (MBA), Amberton University, Mesquite, Texas

Bachelor of Arts, Professional Business Development, Amberton University, Mesquite, Texas

Certifications

Thompson Diploma in Java

IMS 6.0 Brainbench Certification

Certified Data Processor (CDP)

Certified Computer Processor (CCP

Professional Development

Fellow, Life Management Institute (FLMI)

Health Insurance Association of America (HIAA) Completion

Technical Proficiencies

Hardware: IBM 370, IBM 30XX and 43XX, PC

Languages: COBOL (through Enterprise COBOL 3), PL/1, Natural, ALC, Java, J2EE, C, C#, VB6, VBScript, Classic ASP, Rexx, Easytrieve, Focus, DYL280, S-COBOL, DLT0

Databases and Subsystems: DB2, IMS DB/DC, CICS, MFS, BTS

Mainframe Tools: TSO/ISPF, Roscoe, Panvalet, ChangeMan, Xpediter, InterTest, File-AID, Syncsort, CAPEX Optimizer/Analyzer, Excelerator, MainView, APS, Telon, CEDF

Platforms and Environments: OS/MVS, DOS/VSE, UNIX, LU 6.2, InfoMan, Endeavour

Web and Desktop: NetExpress (Object COBOL), InterDev, MS SourceSafe

Methodologies: Agile Methodologies

Affiliation

Institute for the Certification of Computer Professionals

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