Jobs / United States / Ensono INC
Senior Mainframe Systems Programmer - ISV
Ensono INC · 🇺🇸 Remote - United States · Remote
Sponsorship verdict
Sponsorship possible
One solid signal, not two — worth applying, and worth asking about sponsorship early.
- Employer is on a government sponsor recordThe US Department of Labor certified 15 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first. USCIS also records 5 H-1B approvals in FY2023. Source: LCA disclosure data (US Department of Labor (OFLC)).
- The posting doesn’t mention sponsorshipSilence isn’t a refusal — ask the recruiter before investing much time.
- No salary bar for this routeH-1B has no fixed salary bar: the employer must pay at least the prevailing wage for the role and area. Cap-subject employers enter a lottery weighted by wage level. Source: https://www.federalregister.gov/documents/2025/12/29/2025-23853/weighted-selection-process-for-registrants-and-petitioners-seeking-to-file-cap-subject-h-1b, rules effective 2026-02-27.
- What Ensono INC paid sponsored hires in similar roles2 certified filings for “Solution Delivery Architect” (Network and Computer Systems Administrators) in IL: $120k–$135k, median $128k. Most were filed at wage level IV (100%) — 4 lottery entries, ≈61% projected selection odds for cap-subject employers. Source: US Department of Labor LCA disclosure data (Oct 2025 – Jun 2026).
- Confirmed live todayWhen a source last listed this job as open.
US H-1B: cap-subject employers enter a lottery weighted by wage level — Level I gets 1 entry, Level IV gets 4 (DHS projected selection odds ≈15% at Level I to ≈61% at Level IV). Universities and non-profit research employers are cap-exempt. The $100,000 fee for new petitions from abroad is currently blocked by a court order (appeal pending).
A verdict summarises public evidence; it is not legal advice and never a guarantee — the employer and the immigration authority decide. Sign in to factor in where you can already work.
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Sponsor Radar — Ensono INC
The US Department of Labor certified 15 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first. USCIS also records 5 H-1B approvals in FY2023. Source: LCA disclosure data (US Department of Labor (OFLC)).
Past sponsorship or register membership never guarantees sponsorship for this vacancy or for you. Full Sponsor Radar for Ensono INC →
About the role
We are seeking an experienced ISV z/OS Systems Programmer with strong expertise in the installation, maintenance, troubleshooting, and migration of Independent Software Vendor (ISV) products on the IBM z/OS platform. This role will focus heavily on evaluating, replacing, and migrating software on a mainframe environment with alternative solutions while maintaining operational stability and performance. The ideal candidate will possess deep technical knowledge of mainframe systems programming, SMP/E software management, IBM utilities, and ISV product lifecycle management , along with experience performing product migrations and conversions between competing vendor tools. Key Responsibilities • Install, configure, maintain, and upgrade third-party ISV software products in a z/OS environment. • Lead initiatives to replace mainframe products with alternative vendor solutions. • Perform product evaluations, proof-of-concepts, and technical comparisons of replacement tools. • Plan and execute product migration and conversion activities , including configuration changes, data conversions, and operational cutovers. • Maintain and manage software using SMP/E , including RECEIVE, APPLY, ACCEPT, USERMODs, and maintenance management. • Troubleshoot and resolve issues related to ISV software installations, integrations, and runtime problems . • Work with application teams, operations, and vendors to diagnose system or product issues. • Develop and maintain installation documentation, procedures, and migration runbooks . • Assist in capacity planning, performance tuning, and operational support for ISV tools. • Support incident resolution and participate in root cause analysis for production issues involving ISV software. • Evaluate compatibility and impact of new z/OS releases on installed ISV products. Required Skills and Experience • Extensive experience as a z/OS Systems Programmer supporting enterprise mainframe environments. • Strong background in installation and maintenance of ISV mainframe software products . • Hands-on experience with SMP/E software installation and maintenance processes . • Experience performing product migrations or conversions between competing vendor tools . • Strong troubleshooting and diagnostic skills across the z/OS platform. • Experience with IBM utilities and system tools commonly used in z/OS environments. • High-level working knowledge of TSO/ISPF environments and utilities. • Experience supporting multi-vendor ISV ecosystems in production mainframe environments. • Ability to analyze system documentation, vendor materials, and product architectures. Preferred Qualifications • Experience specifically replacing ISV mainframe products with alternative vendor solutions. • Familiarity with common ISV categories such as: • Output management • Security • Scheduling • Storage management • Performance monitoring • Database tools • Automation operations • Experience working with vendor support organizations to resolve complex technical issues. • Knowledge of z/OS system internals, JES, RACF, and subsystem integration . • Experience with automation, scripting, or operational tooling in the z/OS environment. Personal Attributes • Strong analytical and problem-solving skills. • Ability to manage complex migrations and product transitions in production environments. • Excellent documentation and communication skills. • Self-motivated with the ability to work independently or as part of a systems engineering team. • Ability to work on multiple client projects at the same time Typical Deliverables • ISV product installation documentation • Migration and replacement project plans • Troubleshooting guides and operational procedures • Product comparison and evaluation reports •