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Legacy COBOL/C modernization
Preserve proven business rules while improving build, runtime, diagnostics, and supportability.
Production-safe modernization for critical legacy systems
Modernizing Legacy Systems With Minimal Risk
NLTC helps enterprises upgrade COBOL/C, middleware, batch, online, database, and Linux environments with minimal risk, practical engineering, and production-safe execution.
COBOL and C
OpenVMS to Linux
Oracle Tuxedo
ActiveMQ
RHEL upgrades
Oracle DB and file migration
What NLTC Does
Practical modernization across legacy application stacks.
NLTC works where enterprise systems often carry the most operational risk: old runtime behavior, middleware boundaries, batch dependencies, data migration, and production troubleshooting.
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OpenVMS and mainframe-style migration
Move legacy platform behavior to Linux without losing file, process, and operational semantics.
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RHEL upgrades
Plan and validate OS, compiler, library, scheduler, and middleware changes before production rollout.
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Oracle Tuxedo support
Improve online transaction stability, domains, queues, service behavior, and operational evidence.
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ActiveMQ and queue integration
Stabilize message flows, failover behavior, duplicate handling, and cross-system delivery paths.
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Batch and online modernization
Modernize processing flows while protecting scheduling, restart, reconciliation, and service continuity.
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Oracle DB and file migration
Validate data correctness, transaction behavior, indexing, file conversion, and repeatable-read assumptions.
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Performance troubleshooting and RCA
Find root causes for memory growth, contention, slow calls, build regressions, and production instability.
Why NLTC
Conservative engineering for systems that must keep running.
Modernization succeeds when it respects the production system. NLTC favors small, testable, explainable changes over broad rewrites that increase operational uncertainty.
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Minimal-risk changes
Scope changes tightly, document behavior, and build acceptance evidence before production exposure.
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Deep hands-on legacy engineering
Work directly with COBOL, C, Pro*COBOL, middleware, batch, Linux, queues, files, and databases.
✓
Strong production troubleshooting
Move from symptom to evidence to root cause across application, OS, database, and middleware layers.
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Practical approach
Use the smallest intervention that improves reliability and maintainability without unnecessary churn.
✓
Financial-sector fit
Comfortable with continuity, correctness, auditability, and operational discipline expected in regulated environments.
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Accountability and maintainability
Leave teams with understandable fixes, diagnostics, runbooks, evidence packs, and supportable decisions.
Services
Focused engagements with clear operational value.
NLTC can support a narrow production issue, a readiness assessment, or a phased modernization program.
Legacy modernization assessment
Inventory platform dependencies, runtime risks, data flows, operational gaps, and quick wins.
Migration and upgrade planning
Create a conservative path for OpenVMS to Linux, RHEL upgrades, runtime changes, and cutover readiness.
Tuxedo / COBOL / MQ health checks
Review domain configuration, queues, service behavior, logs, scaling assumptions, and failover readiness.
Performance and contention tuning
Find slow paths, locking issues, memory growth, queue latency, file I/O pressure, and runtime regressions.
Production incident RCA
Convert ambiguous incidents into evidence, reproducible findings, fixes, and operational prevention steps.
Vendor support / SR evidence
Prepare logs, traces, repro cases, configuration context, and technical narratives for vendor escalation.
Proof / Experience
Examples from real modernization and production work.
Client names are omitted where confidentiality applies. The examples show the kind of results NLTC is built to deliver.
01
OpenVMS to Linux migration
Supported migration of mainframe-style enterprise workloads to Linux while preserving runtime behavior, business rules, and operational continuity.
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COBOL/C runtime modernization
Resolved compiler, ABI, and runtime issues with targeted fixes that avoided broad rewrites and restored safe optimized builds.
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Tuxedo production issue resolution
Investigated long-running services, memory growth, queue behavior, and transaction symptoms to isolate practical root causes.
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Database/file migration correctness
Validated conversion behavior, transaction semantics, repeatable-read assumptions, and data integrity during database and file migration.
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Performance and memory-growth fixes
Used evidence-driven troubleshooting to identify leaks, missing resource cleanup, contention, and production performance regressions.
06
Tooling for legacy development
Published Free Bidi Editor for VS Code to support COBOL files containing RTL text and modernize a practical developer workflow.
Platforms
Representative technologies NLTC supports.
Logos identify technology ecosystems commonly involved in NLTC modernization, integration, and support work.
Logos are trademarks of their respective owners and are used for identification only. No endorsement is implied.
Contact
Start with the system, risk, and timeline.
Send the current platform, target platform, top production risk, and desired timeline. NLTC will reply with practical next steps.
Oren Nissan, President
Direct contact for POCs, readiness checks, production RCA, and modernization support.
Email: contact@nltc-inc.com
Phone: 516-262-1701
Location: N Bellmore, NY 11710
LinkedIn: www.linkedin.com/in/oren-n-0a233539
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