Green Card Senior Mainframe Developer Jobs
Senior Mainframe Developer roles qualify for EB-2 and EB-3 green card sponsorship through PERM labor certification, where your employer documents that no qualified U.S. worker is available before filing your I-140 petition. Mainframe expertise in COBOL, JCL, and z/OS is classified as a specialty occupation, making sponsorship straightforward for employers in banking, insurance, and federal contracting.
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Get Access To All JobsINTRODUCTION
We are seeking a Senior Mainframe Developer with strong experience in MACSS and IBM z/OS environments to support a mission‑critical platform that is currently single‑threaded across project delivery, operations, and platform modernization work.
This role is being added to free up existing FTE capacity and accelerate delivery for the Giga z/OS Connect platform and service build, ensuring stability, scalability, and modernization of core mainframe services.
ROLE AND RESPONSIBILITIES
- Design, develop, and support MACSS‑based and mainframe applications in a complex enterprise environment
- Support project work, production operations, and platform enhancements, reducing reliance on a single SME
- Contribute to the build and expansion of IBM z/OS Connect services, enabling API and microservices integration with distributed platforms
- Partner with platform, infrastructure, and application teams to modernize and expose mainframe services
- Troubleshoot and resolve complex production issues across batch and online processing
- Participate in platform reliability, performance tuning, and operational readiness
- Document systems, processes, and service integrations to reduce operational risk
- Provide mentoring or informal leadership to junior engineers as needed
BASIC QUALIFICATIONS
- 7+ years of mainframe development experience
- Strong hands‑on experience with MACSS (or closely related mainframe transaction/data systems)
- Expertise in COBOL, JCL, CICS, DB2, VSAM
- Experience supporting both application development and production operations
- Familiarity with IBM z/OS Connect (services, APIs, REST enablement)
- Experience working in high‑availability, regulated, or mission‑critical environments
- Strong problem‑solving skills and ability to work independently in a single‑threaded or high‑ownership model
PREFERRED QUALIFICATIONS
- Direct experience building or scaling z/OS Connect EE services
- Exposure to mainframe modernization initiatives (API enablement, service wrappers, DevOps for zOS)
- Experience integrating mainframe services with distributed or cloud platforms
- Knowledge of Git, CI/CD pipelines, or DevOps practices for zOS
- Experience in financial services, insurance, or large enterprise platforms
COMPENSATION
- The pay range that the employer in good faith reasonably expects to pay for this position is $59.79/hour - $93.43/hour.
Our benefits include medical, dental, vision and retirement benefits. Applications will be accepted on an ongoing basis.
Tundra Technical Solutions is among North America’s leading providers of Staffing and Consulting Services. Our success and our clients’ success are built on a foundation of service excellence.
We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Unincorporated LA County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: client provided property, including hardware (both of which may include data) entrusted to you from theft, loss or damage; return all portable client computer hardware in your possession (including the data contained therein) upon completion of the assignment, and; maintain the confidentiality of client proprietary, confidential, or non‑public information. In addition, job duties require access to secure and protected client information technology systems and related data security obligations.
LOCATION
Nashville, TN, United States (Hybrid)
JOB TYPE
Contract (6 months 6 days)
INTRODUCTION
We are seeking a Senior Mainframe Developer with strong experience in MACSS and IBM z/OS environments to support a mission‑critical platform that is currently single‑threaded across project delivery, operations, and platform modernization work.
This role is being added to free up existing FTE capacity and accelerate delivery for the Giga z/OS Connect platform and service build, ensuring stability, scalability, and modernization of core mainframe services.
ROLE AND RESPONSIBILITIES
- Design, develop, and support MACSS‑based and mainframe applications in a complex enterprise environment
- Support project work, production operations, and platform enhancements, reducing reliance on a single SME
- Contribute to the build and expansion of IBM z/OS Connect services, enabling API and microservices integration with distributed platforms
- Partner with platform, infrastructure, and application teams to modernize and expose mainframe services
- Troubleshoot and resolve complex production issues across batch and online processing
- Participate in platform reliability, performance tuning, and operational readiness
- Document systems, processes, and service integrations to reduce operational risk
- Provide mentoring or informal leadership to junior engineers as needed
BASIC QUALIFICATIONS
- 7+ years of mainframe development experience
- Strong hands‑on experience with MACSS (or closely related mainframe transaction/data systems)
- Expertise in COBOL, JCL, CICS, DB2, VSAM
- Experience supporting both application development and production operations
- Familiarity with IBM z/OS Connect (services, APIs, REST enablement)
- Experience working in high‑availability, regulated, or mission‑critical environments
- Strong problem‑solving skills and ability to work independently in a single‑threaded or high‑ownership model
PREFERRED QUALIFICATIONS
- Direct experience building or scaling z/OS Connect EE services
- Exposure to mainframe modernization initiatives (API enablement, service wrappers, DevOps for zOS)
- Experience integrating mainframe services with distributed or cloud platforms
- Knowledge of Git, CI/CD pipelines, or DevOps practices for zOS
- Experience in financial services, insurance, or large enterprise platforms
COMPENSATION
- The pay range that the employer in good faith reasonably expects to pay for this position is $59.79/hour - $93.43/hour.
Our benefits include medical, dental, vision and retirement benefits. Applications will be accepted on an ongoing basis.
Tundra Technical Solutions is among North America’s leading providers of Staffing and Consulting Services. Our success and our clients’ success are built on a foundation of service excellence.
We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Unincorporated LA County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: client provided property, including hardware (both of which may include data) entrusted to you from theft, loss or damage; return all portable client computer hardware in your possession (including the data contained therein) upon completion of the assignment, and; maintain the confidentiality of client proprietary, confidential, or non‑public information. In addition, job duties require access to secure and protected client information technology systems and related data security obligations.
LOCATION
Nashville, TN, United States (Hybrid)
JOB TYPE
Contract (6 months 6 days)
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Get Access To All JobsTips for Finding Green Card Sponsorship as a Senior Mainframe Developer
Document your COBOL and z/OS credentials early
Gather transcripts, certifications, and employment records that map directly to IBM z/OS, COBOL, JCL, and CICS. PERM audits often target mainframe roles because DOL wants proof your skills match the job description, not just a general CS degree.
Target industries with active PERM filing histories
Banking, insurance, and federal government contractors file the most mainframe PERM applications. These industries run legacy systems that genuinely can't be replaced and sponsor foreign developers at EB-3 and EB-2 levels regularly.
Search verified sponsors using Migrate Mate
Filter by 'Senior Mainframe Developer' and employment-based green card sponsorship on Migrate Mate to surface employers with confirmed PERM filing histories for this specific role, so you're not guessing which companies actually sponsor.
Verify the prevailing wage tier before negotiating
Your employer's PERM application locks in a wage level using the OFLC Wage Search. Wage Level III or IV applies to most senior roles. Accepting a lower title to get hired can trap your case at a wage tier that doesn't reflect your actual experience.
Clarify whether EB-2 or EB-3 fits your credentials
EB-2 requires a master's degree or its equivalent in relevant experience. If you hold a bachelor's plus five years of mainframe experience, your employer can make the EB-2 case. EB-3 is available with a bachelor's degree and avoids that equivalency argument entirely.
Confirm the employer's timeline before accepting an offer
PERM labor certification typically takes six to twelve months before USCIS even receives the I-140. Ask the hiring team directly whether they've completed PERM filings before and whether they have in-house immigration counsel or use outside firms.
Green Card Senior Mainframe Developer: Frequently Asked Questions
Does a Senior Mainframe Developer role qualify for EB-2 or EB-3 sponsorship?
Both categories are available depending on your credentials. EB-3 applies when the position requires at least a bachelor's degree in computer science, information systems, or a related field. EB-2 applies when the role requires an advanced degree, or when your employer argues that a bachelor's plus five or more years of progressive mainframe experience is equivalent to a master's. USCIS evaluates these equivalency arguments on a case-by-case basis.
How does green card sponsorship differ from H-1B sponsorship for this role?
H-1B visa is a temporary status with a three-year initial period and annual cap exposure. Green card sponsorship through PERM and I-140 is permanent and has no annual cap at the EB-3 level for most nationalities. The tradeoff is timeline: PERM labor certification alone takes six to twelve months before your I-140 is filed. For Indian and Chinese nationals, priority date backlogs add years beyond that, so starting early matters significantly.
What does the PERM process actually require from a Senior Mainframe Developer's employer?
The employer must conduct a supervised recruitment campaign, advertise the role publicly, and document that no minimally qualified U.S. worker applied. The job description must match the actual duties and the minimum requirements must reflect what the role genuinely needs. Overstating requirements to narrow the candidate pool is a common PERM audit trigger, especially for highly specific mainframe skill combinations like COBOL, VSAM, and DB2 together.
How can I find employers actively sponsoring Senior Mainframe Developer green cards?
Use Migrate Mate to search specifically for Senior Mainframe Developer positions with employment-based green card sponsorship. The platform surfaces employers with verified PERM filing histories for this role, so you can prioritize outreach to companies that have already navigated the process rather than educating a new employer about it from scratch.
Can I switch employers after my I-140 is approved but before my green card is granted?
Yes, under AC21 portability rules, you can change employers after your I-140 has been approved and your priority date has been pending for more than 180 days, provided the new role is in the same or a substantially similar occupational classification. For mainframe developers, a comparable senior developer role at a different company generally qualifies. Your priority date is preserved, which is the part of your case most worth protecting.