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Keep production stable while you modernize (no big‑bang rewrite)
Modernize legacy COBOL/C systems with minimal risk — and measurable results.
NLTC helps banks, card issuers, and fintechs upgrade legacy platforms (OpenVMS / mainframe heritage) to modern Linux stacks while protecting uptime, data integrity, and decades of business rules.
COBOL • C • Pro*COBOL
Linux (RHEL) upgrades
Oracle Tuxedo & batch scheduling
ActiveMQ, data files, Oracle DB
Outcomes
Clear business value—delivered in production‑friendly steps.
Modern platform, same trusted logic
Keep the COBOL core you trust while upgrading the platform around it for supportability and speed.
Production stability & reliability
Stop “slow-burn” incidents (leaks, timeouts, runaway threads) before they become outages.
Safer upgrades, faster change
Upgrade RHEL / compilers / middleware with a risk matrix, rehearsals, and acceptance evidence.
Data integrity under concurrency
Migration-safe transaction semantics and validation—so correctness survives platform change.
Services
Hands-on help where legacy stacks break: runtimes, file handlers, transactions, queues, and TP monitors, plus IDE tools that make modern and legacy development smoother.
Free Bidi VS Code Extension
Bidirectional text support in Visual Studio Code for Arabic and Hebrew editing with reliable cursor behavior.
Arabic
Hebrew
VS Code
Migration & upgrade delivery
OpenVMS → Linux, RHEL upgrades, compiler/runtime modernization—delivered with conservative change control.
OpenVMS → Linux
RHEL 7 → 9
Compatibility layers
Online + batch integration
Stabilize end-to-end flows across Tuxedo, schedulers, queues, and Oracle DB—without guesswork.
Oracle Tuxedo
BMC Control‑M
ActiveMQ
Performance & incident response
Root-cause production issues fast (leaks, timeouts, contention) with minimal, safe code changes.
Valgrind
Profiling
Runbooks
Engagement options
Short, focused engagements with clear deliverables and outcomes.
Tuxedo / COBOL / MQ Health Check (2–4 weeks)
Assess stability and operational risk across domains, ULOGs, queue configs, and failover design—then deliver quick wins.
RCA playbooks
Monitoring targets
HA + failover review
Upgrade Readiness (4–8 weeks)
RHEL / compiler / middleware readiness plan with a dependency risk matrix and a non‑disruptive rollout path.
Risk matrix
Test strategy
Cutover plan
Performance & contention tuning
Deep dives on file I/O, DB locking, queue latency, MSSQ scaling, and long-running calls—with before/after metrics.
Throughput
Latency
Capacity
Vendor SR bridge
We build minimal repros, translate symptoms into evidence, push SRs to real fixes, and validate patches in your environment.
Repro harnesses
Evidence packs
Patch validation
Proof from real work
Examples of the kinds of problems we solve in production and in migrations.
Stopped gradual memory growth in long-running Tuxedo services
Turned a PROD symptom into a deterministic test loop and fixed the root cause (missing DB cursor close) to keep memory stable.
Restored safe optimized builds after a production-impacting issue
Proved the issue was a C optimization / type mismatch (not COBOL) and applied a minimal, low-risk correction.
Protected data integrity during Oracle Rdb → Oracle DB migration
Reworked the DB access layer to preserve repeatable-read behavior without overusing SERIALIZABLE, avoiding contention and silent corruption.
Completed a full OpenVMS → Linux migration without losing behavior
Modern Linux platform + better observability while preserving legacy file semantics and operational continuity.
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Oren Nissan — President
Phone: 516‑262‑1701
Address: 2505 Haff Ave, N Bellmore, NY 11710
LinkedIn: www.linkedin.com/in/oren-n-0a233539
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Technologies & Platforms
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