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 JobsWho We Are
At Kyndryl, we design, build, manage and modernize the mission-critical technology systems that the world depends on every day. So why work at Kyndryl? We are always moving forward – always pushing ourselves to go further in our efforts to build a more equitable, inclusive world for our employees, our customers and our communities.
The Role
About the Role:
The Mainframe Network Engineer is responsible for the design, configuration, implementation, and support of network connectivity for IBM mainframe environments. This role ensures reliable, secure, and high-performing communication between mainframe systems, distributed platforms, external partners, and enterprise applications. The engineer will work on key technologies such as TCP/IP, VTAM, SNA, Enterprise Extender, TN3270, FTP, and network security controls, supporting critical production workloads in large enterprise environments.
Role Responsibilities:
Mainframe Network Administration:
- Install, configure, and maintain z/OS Communications Server components
- Support and manage TCP/IP configuration on z/OS systems
- Maintain and troubleshoot VTAM definitions and network resources
- Configure and support Enterprise Extender (EE) and SNA connectivity where applicable
- Maintain TN3270 access and session-related connectivity for end users and applications.
Network Connectivity & Support:
- Ensure stable communication between mainframe systems and:
- Distributed servers
- External vendors/partners
- Internal enterprise applications
- Middleware platforms
- Diagnose and resolve connectivity issues involving:
- IP routing
- Port communication
- Session failures
- DNS resolution
- Firewall-related blocks
- Support file transfer protocols such as FTP, SFTP, and other secure data exchange solutions.
Security & Compliance:
- Work closely with network security teams to enforce secure communication protocols.
- Ensure compliance with enterprise security controls and audit requirements.
- Support SSL/TLS certificate implementation and secure transmission standards.
- Assist with firewall rule validation, port usage reviews, and vulnerability remediation.
Disaster Recovery & Resiliency:
- Support network design and recovery procedures for Disaster Recovery (DR) environments.
- Validate communication paths for failover systems and backup data centers.
- Participate in DR tests and business continuity exercises.
Required Qualifications:
Minimum 5+ years of experience in:
- Mainframe networking or z/OS communications support
- Familiarity with JCL, TSO/ISPF, SDSF
- Ability to analyze logs, traces, and dump information relevant to communications issues
- Solid knowledge and experience on TCP/IP on z/OS, VTAM, SNA / Enterprise Extender, TN3270, FTP / SFTP and TLS.
Preferred Experience:
- Experience in supporting transmission products, such as Connect Direct.
- The ability to work independently as well as part of a team
- Excellent troubleshooting and customer service skills
- Participate in on-call rotation with the engineering teams
- The ability to follow a project through to completion, and/or to work as part of a larger team to complete the components of a complex project
- IBM mainframe or networking certifications are a plus
Kyndryl currently does not require employees to be fully vaccinated against COVID-19, however, if you are hired to work at a client, customer, or partner location, you may be required to show proof of vaccination to align with their respective COVID-19 vaccination policies. Those who believe they are eligible may apply for a medical or religious accommodation prior to the start of employment.
Who You Are
Required Qualifications: Minimum 5+ years of experience in:
- Typically in mainframe networking or z/OS communications support
- Familiarity with JCL, TSO/ISPF, SDSF
- Ability to analyze logs, traces, and dump information relevant to communications issues
- Solid knowledge and experience on TCP/IP on z/OS, VTAM, SNA / Enterprise Extender, TN3270, FTP / SFTP and TLS.
Preferred Experience:
- Experience in supporting transmission products such as Connect Direct.
- The ability to work independently as well as part of a team
- Excellent troubleshooting and customer service skills
- Participate in on-call rotation with the engineering teams.
- The ability to follow a project through to completion, and/or to work as part of a larger team to complete the components of a complex project
- IBM mainframe or networking certifications are a plus
Being You
Diversity is a whole lot more than what we look like or where we come from, it’s how we think and who we are. We welcome people of all cultures, backgrounds, and experiences. But we’re not doing it single-handedly: Our Kyndryl Inclusion Networks are only one of many ways we create a workplace where all Kyndryls can find and provide support and advice. This dedication to welcoming everyone into our company means that Kyndryl gives you – and everyone next to you – the ability to bring your whole self to work, individually and collectively, and support the activation of our equitable culture. That’s the Kyndryl Way.
What You Can Expect
With state-of-the-art resources and Fortune 100 clients, every day is an opportunity to innovate, build new capabilities, new relationships, new processes, and new value. Kyndryl cares about your well-being and prides itself on offering benefits that give you choice, reflect the diversity of our employees and support you and your family through the moments that matter – wherever you are in your life journey. Our employee learning programs give you access to the best learning in the industry to receive certifications, including Microsoft, Google, Amazon, Skillsoft, and many more. Through our company-wide volunteering and giving platform, you can donate, start fundraisers, volunteer, and search over 2 million non-profit organizations. At Kyndryl, we invest heavily in you, we want you to succeed so that together, we will all succeed.
Get Referred!
If you know someone that works at Kyndryl, when asked ‘How Did You Hear About Us’ during the application process, select ‘Employee Referral’ and enter your contact's Kyndryl email address.
Who We Are
At Kyndryl, we design, build, manage and modernize the mission-critical technology systems that the world depends on every day. So why work at Kyndryl? We are always moving forward – always pushing ourselves to go further in our efforts to build a more equitable, inclusive world for our employees, our customers and our communities.
The Role
About the Role:
The Mainframe Network Engineer is responsible for the design, configuration, implementation, and support of network connectivity for IBM mainframe environments. This role ensures reliable, secure, and high-performing communication between mainframe systems, distributed platforms, external partners, and enterprise applications. The engineer will work on key technologies such as TCP/IP, VTAM, SNA, Enterprise Extender, TN3270, FTP, and network security controls, supporting critical production workloads in large enterprise environments.
Role Responsibilities:
Mainframe Network Administration:
- Install, configure, and maintain z/OS Communications Server components
- Support and manage TCP/IP configuration on z/OS systems
- Maintain and troubleshoot VTAM definitions and network resources
- Configure and support Enterprise Extender (EE) and SNA connectivity where applicable
- Maintain TN3270 access and session-related connectivity for end users and applications.
Network Connectivity & Support:
- Ensure stable communication between mainframe systems and:
- Distributed servers
- External vendors/partners
- Internal enterprise applications
- Middleware platforms
- Diagnose and resolve connectivity issues involving:
- IP routing
- Port communication
- Session failures
- DNS resolution
- Firewall-related blocks
- Support file transfer protocols such as FTP, SFTP, and other secure data exchange solutions.
Security & Compliance:
- Work closely with network security teams to enforce secure communication protocols.
- Ensure compliance with enterprise security controls and audit requirements.
- Support SSL/TLS certificate implementation and secure transmission standards.
- Assist with firewall rule validation, port usage reviews, and vulnerability remediation.
Disaster Recovery & Resiliency:
- Support network design and recovery procedures for Disaster Recovery (DR) environments.
- Validate communication paths for failover systems and backup data centers.
- Participate in DR tests and business continuity exercises.
Required Qualifications:
Minimum 5+ years of experience in:
- Mainframe networking or z/OS communications support
- Familiarity with JCL, TSO/ISPF, SDSF
- Ability to analyze logs, traces, and dump information relevant to communications issues
- Solid knowledge and experience on TCP/IP on z/OS, VTAM, SNA / Enterprise Extender, TN3270, FTP / SFTP and TLS.
Preferred Experience:
- Experience in supporting transmission products, such as Connect Direct.
- The ability to work independently as well as part of a team
- Excellent troubleshooting and customer service skills
- Participate in on-call rotation with the engineering teams
- The ability to follow a project through to completion, and/or to work as part of a larger team to complete the components of a complex project
- IBM mainframe or networking certifications are a plus
Kyndryl currently does not require employees to be fully vaccinated against COVID-19, however, if you are hired to work at a client, customer, or partner location, you may be required to show proof of vaccination to align with their respective COVID-19 vaccination policies. Those who believe they are eligible may apply for a medical or religious accommodation prior to the start of employment.
Who You Are
Required Qualifications: Minimum 5+ years of experience in:
- Typically in mainframe networking or z/OS communications support
- Familiarity with JCL, TSO/ISPF, SDSF
- Ability to analyze logs, traces, and dump information relevant to communications issues
- Solid knowledge and experience on TCP/IP on z/OS, VTAM, SNA / Enterprise Extender, TN3270, FTP / SFTP and TLS.
Preferred Experience:
- Experience in supporting transmission products such as Connect Direct.
- The ability to work independently as well as part of a team
- Excellent troubleshooting and customer service skills
- Participate in on-call rotation with the engineering teams.
- The ability to follow a project through to completion, and/or to work as part of a larger team to complete the components of a complex project
- IBM mainframe or networking certifications are a plus
Being You
Diversity is a whole lot more than what we look like or where we come from, it’s how we think and who we are. We welcome people of all cultures, backgrounds, and experiences. But we’re not doing it single-handedly: Our Kyndryl Inclusion Networks are only one of many ways we create a workplace where all Kyndryls can find and provide support and advice. This dedication to welcoming everyone into our company means that Kyndryl gives you – and everyone next to you – the ability to bring your whole self to work, individually and collectively, and support the activation of our equitable culture. That’s the Kyndryl Way.
What You Can Expect
With state-of-the-art resources and Fortune 100 clients, every day is an opportunity to innovate, build new capabilities, new relationships, new processes, and new value. Kyndryl cares about your well-being and prides itself on offering benefits that give you choice, reflect the diversity of our employees and support you and your family through the moments that matter – wherever you are in your life journey. Our employee learning programs give you access to the best learning in the industry to receive certifications, including Microsoft, Google, Amazon, Skillsoft, and many more. Through our company-wide volunteering and giving platform, you can donate, start fundraisers, volunteer, and search over 2 million non-profit organizations. At Kyndryl, we invest heavily in you, we want you to succeed so that together, we will all succeed.
Get Referred!
If you know someone that works at Kyndryl, when asked ‘How Did You Hear About Us’ during the application process, select ‘Employee Referral’ and enter your contact's Kyndryl email address.
See all 69+ Green Card Senior Mainframe Developer Jobs
Sign up for free to unlock all listings, filter by visa type, and get alerts for new Green Card Senior Mainframe Developer Jobs.
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.