Dustin Ryan
dustin@ryan.com
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(806) 719-3491
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linkedin.com/in/dustin-ryan
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@dustin.ryan
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github.com/dustinryan
Mainframe Developer
Seasoned Mainframe Developer with 15+ years of expertise in COBOL, JCL, and DB2 optimization. Proficient in modernizing legacy systems and implementing cloud integration strategies, resulting in a 40% improvement in processing efficiency for a Fortune 500 client. Adept at leading cross-functional teams and driving innovation in mainframe environments while ensuring robust cybersecurity measures.
WORK EXPERIENCE
Mainframe Developer
04/2022 – Present
Nebula Systems
Architected and implemented a hybrid cloud integration framework connecting legacy mainframe systems with AWS cloud services, reducing transaction processing time by 62% while maintaining 99.99% uptime
Spearheaded the modernization of 15+ critical COBOL applications using AI-assisted code refactoring tools, eliminating 78,000+ lines of redundant code and decreasing maintenance costs by $1.2M annually
Led a cross-functional team of 8 developers to design and deploy containerized mainframe workloads using zCX, enabling seamless DevOps practices and reducing deployment cycles from weeks to hours
Senior Mainframe Systems Analyst
03/2020 – 03/2022
SpireLake Medical
Engineered a real-time data synchronization solution between DB2 and distributed databases, processing over 3 million daily transactions with zero data loss during the 6-month implementation period
Optimized CICS transaction processing by redesigning JCL workflows and implementing parallel processing techniques, resulting in a 43% reduction in batch processing time
Developed and implemented automated testing frameworks for mainframe applications using Topaz for Total Test, increasing test coverage by 65% while reducing QA cycles by 3 weeks
Junior Mainframe Developer
01/2018 – 02/2020
NovaSpark Healthcare
Diagnosed and resolved 120+ production issues within SLA timeframes, achieving a first-call resolution rate of 87% and earning recognition as top support specialist for Q3
Collaborated with senior developers to refactor legacy COBOL programs, converting 35,000+ lines of monolithic code into modular, reusable components
Created comprehensive documentation for mainframe disaster recovery procedures, which proved instrumental during an unplanned outage, enabling system restoration 40% faster than previous incidents
SKILLS & COMPETENCIES
COBOL and JCL Programming Mastery
z/OS System Architecture and Administration
DB2 Database Management and Optimization
CICS Transaction Processing
Agile Mainframe Development Methodologies
Cloud-Mainframe Integration Strategies
Advanced Problem-Solving and Debugging
Cross-Functional Team Leadership
Legacy System Modernization
DevOps for Mainframe Environments
Effective Technical Communication
AI-Driven Mainframe Performance Tuning
Continuous Integration/Continuous Deployment (CI/CD) for Mainframe
Blockchain Integration with Mainframe Systems
COURSES / CERTIFICATIONS
IBM Certified System Programmer - z/OS
02/2025
IBM