Application development
Senior COBOL development, maintenance, code review, DB2 and VSAM data work, and system testing.
Mainframe & modernization
Focused recruiting for systems that cannot stand still.
Resourcesys recruits for IBM Z mainframe application development, testing support, L2 production support, and modernization work in production-critical enterprise environments.
20
Recent mainframe placements
Senior mainframe professionals placed in one regulated payments-processing enterprise environment over six months in 2026.
Where the practice fits
Specific experience for production-critical work.
The environment, business domain, release process, and production responsibility all shape the right profile.
Resourcesys focuses each search around the platform, codebase, responsibilities, modernization objective, timeline, and engagement model.
What we recruit for
Core capabilities across IBM Z environments.
Our mainframe and modernization work is grounded in application delivery, support, and controlled change.
Testing and release support
Development and testing environments, deployment readiness, batch processing, and release coordination.
Production operations
Diagnostics, troubleshooting, issue resolution, and L2 production support for high-consequence systems.
Modernization context
Staffing that helps teams maintain core platforms while modernization and integration work progresses.
Representative technical environment
Languages & dataCOBOL · DB2 · VSAM
Execution & schedulingJCL · Batch Processing · CA7
Change & operationsEndevor · Testing Support · L2 Production Support
Representative assignment profiles
Work that calls for context.
Application development
Design, development, maintenance, code review, and testing across COBOL, DB2, VSAM, JCL, and batch applications.
COBOLDB2VSAM
Production support
Environment support, deployment readiness, CA7 scheduling, Endevor change management, troubleshooting, and L2 resolution.
CA7EndevorL2 Support
Transaction processing
Experience aligned to acquiring, settlement, clearing, funding, billing, and dispute workflows.
SettlementClearingDisputes
Start with the environment
