TN Visa Senior Mainframe Developer Jobs
Senior Mainframe Developer roles qualify for TN visa sponsorship under the USMCA's Computer Systems Analyst category, covering COBOL, JCL, and z/OS architecture work. Canadian citizens can apply at the border with a job offer; Mexican citizens go through consular processing. Both nationalities need an employer willing to document the specialty occupation.
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INTRODUCTION
We’re determined to make a difference and are proud to be an insurance company that goes well beyond coverages and policies. Working here means having every opportunity to achieve your goals – and to help others accomplish theirs, too. Join our team as we help shape the future.
The Hartford’s Mainframe IT team is seeking a highly motivated Senior Engineer for a high profile, complex and critical applications. Looking for team member that has knowledge of Mainframe software and hardware functions, application production release background is plus. Knowledge of Mainframe software IBM / Broadcom / BMC and third party products.
Responsibilities:
- Collaborate with maintenance and project teams to plan, perform, and maintain routine application and product modifications, enhancements, and upgrades.
- Demonstrate environment management expertise to assist teams in environment solutions.
- Troubleshoot, facilitate collaboration, and resolve test environment issues as well as apply learnings in a continuous improvement capacity.
- Assist project or technical lead in new database designs, and complex production support activities.
- Implement solutions based on established reference architecture.
- Enhance existing database designs for improved longevity, reduced maintenance, and improved performance.
- Build, configure, upgrade, and maintain Claim application test environments and deploy and configure claim applications and/or application changes in compliance with software development life cycle (SDLC) procedures.
- Leverage and investigate new tools for automation of deployment, administration and monitoring of test environments.
- Function as a technical generalist having responsibility for the overall health and performance of the mainframe environments.
- Plans and coordinates with on and offshore staff as well as various enterprise operations teams with any upcoming changes in but not limited to software versions, security certificates, interface queues or end points.
- Creates updates and maintains environment and database/environment-related documentation.
- Supports the overall health of the test environments and their interfaces.
- Perform production support activities (e.g. database consolidation) as needed for SRE support.
- Assist with the evaluation and implementation of new product features to tailor solutions for database requirements.
- Automate routine support tasks.
- Enforce database processes, procedures, best practices, standards, and SLAs.
- Maintain awareness of industry best practices.
- Follow applicable processes, procedures, policies, standards, best practices, and SLAs.
- Learn, understand, and champion ITIL frameworks.
- Integrate process improvements into the way we do our work.
KNOWLEDGE:
- Job Control or report generating languages (e.g. JCL)
- JES3 /JES2
- DB2 and/or IMS support and performance utilities (e.g. data base tool, BMC / IBM and Broadcom utilities, BMC for DB2 and/or IMS)
- Services Now
- TSO/ISPF
- Operations
- Project management
SKILLS:
- Systems analysis
- Development to Production release background
- DB2 and/or IMS data base systems design
- Production support / Release and troubleshooting
- Mainframe Modernization knowledge & skills
- User will acquire both sets of skills (DB2 & IMS) and will be a proficient Systems Programmer (in both disciplines) within six (6) months
ABILITIES:
- Use statistical analysis.
- Write policy and procedure documentation.
- Communicate verbally on technical and non-technical matters.
- Define problems, collect data, establish facts, and draw valid conclusions.
- Read, write, and interpret technical documents.
- Gather, collate, and classify information.
Attention to detail is a must and candidate should have the ability to manage multiple priorities in a fast-paced environment. Successful candidates will have a willingness to understand existing processes and systems and possess strong interpersonal and communication skills. They should be able to identify, clearly articulate and work in consultation with team members and subject matter experts to resolve issues quickly. Candidates must be able to build strong relationships, actively participate in teamwork and understand the dynamics and critical nature of the business.
This role will have a Hybrid work schedule, with the expectation of working in an office (Hartford, CT or Charlotte, NC) 3 days a week (Tuesday through Thursday).
REQUIREMENTS:
- Bachelor's degree in computer science or related field
- Experience in mainframe development
- Strong knowledge of COBOL, JCL, CICS, DB2, IMS, REXX and other mainframe technologies
- .NET Knowledge required
- AWS migration process required.
- Excellent problem-solving and troubleshooting
- Experience with mainframe software development tools and platforms (z/OS, z/VM, IBM System z)
- Excellent verbal and written communication skills
- Understanding mainframe network infrastructure (HTTP/S, TCP/IP, TLS, DNS, Load-balancers, firewalls, proxies, B2B links)
Candidate must be authorized to work in the US without company sponsorship. The company will not support the STEM OPT I-983 Training Plan endorsement for this position.
COMPENSATION
The listed annualized base pay range is primarily based on analysis of similar positions in the external market. Actual base pay could vary and may be above or below the listed range based on factors including but not limited to performance, proficiency and demonstration of competencies required for the role. The base pay is just one component of The Hartford’s total compensation package for employees. Other rewards may include short-term or annual bonuses, long-term incentives, and on-the-spot recognition. The annualized base pay range for this role is:
$116,800 - $175,200
Equal Opportunity Employer/Sex/Race/Color/Veterans/Disability/Sexual Orientation/Gender Identity or Expression/Religion/Age

INTRODUCTION
We’re determined to make a difference and are proud to be an insurance company that goes well beyond coverages and policies. Working here means having every opportunity to achieve your goals – and to help others accomplish theirs, too. Join our team as we help shape the future.
The Hartford’s Mainframe IT team is seeking a highly motivated Senior Engineer for a high profile, complex and critical applications. Looking for team member that has knowledge of Mainframe software and hardware functions, application production release background is plus. Knowledge of Mainframe software IBM / Broadcom / BMC and third party products.
Responsibilities:
- Collaborate with maintenance and project teams to plan, perform, and maintain routine application and product modifications, enhancements, and upgrades.
- Demonstrate environment management expertise to assist teams in environment solutions.
- Troubleshoot, facilitate collaboration, and resolve test environment issues as well as apply learnings in a continuous improvement capacity.
- Assist project or technical lead in new database designs, and complex production support activities.
- Implement solutions based on established reference architecture.
- Enhance existing database designs for improved longevity, reduced maintenance, and improved performance.
- Build, configure, upgrade, and maintain Claim application test environments and deploy and configure claim applications and/or application changes in compliance with software development life cycle (SDLC) procedures.
- Leverage and investigate new tools for automation of deployment, administration and monitoring of test environments.
- Function as a technical generalist having responsibility for the overall health and performance of the mainframe environments.
- Plans and coordinates with on and offshore staff as well as various enterprise operations teams with any upcoming changes in but not limited to software versions, security certificates, interface queues or end points.
- Creates updates and maintains environment and database/environment-related documentation.
- Supports the overall health of the test environments and their interfaces.
- Perform production support activities (e.g. database consolidation) as needed for SRE support.
- Assist with the evaluation and implementation of new product features to tailor solutions for database requirements.
- Automate routine support tasks.
- Enforce database processes, procedures, best practices, standards, and SLAs.
- Maintain awareness of industry best practices.
- Follow applicable processes, procedures, policies, standards, best practices, and SLAs.
- Learn, understand, and champion ITIL frameworks.
- Integrate process improvements into the way we do our work.
KNOWLEDGE:
- Job Control or report generating languages (e.g. JCL)
- JES3 /JES2
- DB2 and/or IMS support and performance utilities (e.g. data base tool, BMC / IBM and Broadcom utilities, BMC for DB2 and/or IMS)
- Services Now
- TSO/ISPF
- Operations
- Project management
SKILLS:
- Systems analysis
- Development to Production release background
- DB2 and/or IMS data base systems design
- Production support / Release and troubleshooting
- Mainframe Modernization knowledge & skills
- User will acquire both sets of skills (DB2 & IMS) and will be a proficient Systems Programmer (in both disciplines) within six (6) months
ABILITIES:
- Use statistical analysis.
- Write policy and procedure documentation.
- Communicate verbally on technical and non-technical matters.
- Define problems, collect data, establish facts, and draw valid conclusions.
- Read, write, and interpret technical documents.
- Gather, collate, and classify information.
Attention to detail is a must and candidate should have the ability to manage multiple priorities in a fast-paced environment. Successful candidates will have a willingness to understand existing processes and systems and possess strong interpersonal and communication skills. They should be able to identify, clearly articulate and work in consultation with team members and subject matter experts to resolve issues quickly. Candidates must be able to build strong relationships, actively participate in teamwork and understand the dynamics and critical nature of the business.
This role will have a Hybrid work schedule, with the expectation of working in an office (Hartford, CT or Charlotte, NC) 3 days a week (Tuesday through Thursday).
REQUIREMENTS:
- Bachelor's degree in computer science or related field
- Experience in mainframe development
- Strong knowledge of COBOL, JCL, CICS, DB2, IMS, REXX and other mainframe technologies
- .NET Knowledge required
- AWS migration process required.
- Excellent problem-solving and troubleshooting
- Experience with mainframe software development tools and platforms (z/OS, z/VM, IBM System z)
- Excellent verbal and written communication skills
- Understanding mainframe network infrastructure (HTTP/S, TCP/IP, TLS, DNS, Load-balancers, firewalls, proxies, B2B links)
Candidate must be authorized to work in the US without company sponsorship. The company will not support the STEM OPT I-983 Training Plan endorsement for this position.
COMPENSATION
The listed annualized base pay range is primarily based on analysis of similar positions in the external market. Actual base pay could vary and may be above or below the listed range based on factors including but not limited to performance, proficiency and demonstration of competencies required for the role. The base pay is just one component of The Hartford’s total compensation package for employees. Other rewards may include short-term or annual bonuses, long-term incentives, and on-the-spot recognition. The annualized base pay range for this role is:
$116,800 - $175,200
Equal Opportunity Employer/Sex/Race/Color/Veterans/Disability/Sexual Orientation/Gender Identity or Expression/Religion/Age
See all 17+ Senior Mainframe Developer jobs
Sign up for free to unlock all listings, filter by visa type, and get alerts for new Senior Mainframe Developer roles.
Get Access To All JobsTips for Finding TN Visa Sponsorship as a Senior Mainframe Developer
Align your credentials to Computer Systems Analyst
TN classification for mainframe work falls under Computer Systems Analyst, not a generic IT category. Your resume and degree transcripts must show systems-level work, not just programming tasks, before you approach any employer.
Target employers with active z/OS environments
Banks, insurance carriers, federal contractors, and large utilities run COBOL and IMS workloads that require dedicated mainframe staff. These organizations already understand specialty occupation documentation because they file repeatedly for the same roles.
Clarify Canadian versus Mexican processing before accepting an offer
Canadian citizens can receive TN approval at a port of entry on the day of travel. Mexican citizens need a consular visa appointment, which adds weeks to the timeline. Confirm which process applies before committing to a start date with your employer.
Request a support letter that details mainframe architecture duties
Generic IT offer letters get scrutinized at the border. Ask your employer to specify z/OS, VSAM, DB2, or CICS responsibilities by name. CBP officers confirm the role matches Computer Systems Analyst criteria, so vague language creates unnecessary risk.
Use Migrate Mate to find employers already sponsoring TN roles
Searching broadly wastes time on employers unfamiliar with visa sponsorship. Migrate Mate filters for companies with recent visa filings in technical roles, so your outreach goes to hiring managers already experienced with sponsoring work visas.
Prepare your support letter for the visa offer timeline
Your employer prepares a support letter outlining the role, qualifications, and worksite details. For Canadian applicants, you'll present this letter at the U.S. port of entry; for Mexican applicants, your employer submits it with your consulate application. Build a few days into your timeline for the employer to finalize documentation so the process isn't rushed.
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Find Senior Mainframe Developer JobsSenior Mainframe Developer TN Visa: Frequently Asked Questions
Does Senior Mainframe Developer work qualify for TN visa classification?
Yes, provided the role is framed around systems analysis rather than routine programming. CBP classifies mainframe developers under Computer Systems Analyst when the duties include architecture, integration, or optimization of z/OS environments. If the offer letter describes only code writing with no systems-level responsibility, the classification becomes harder to support. Duties like CICS configuration, DB2 schema design, or JCL workflow optimization strengthen the case significantly.
How does TN compare to H-1B for Senior Mainframe Developer roles?
TN has no lottery, no annual cap for Canadians, and no multi-month USCIS adjudication wait. A Canadian citizen with a qualifying offer letter can gain TN status at the port of entry on travel day. H-1B requires entering a randomized lottery in March for an October start date, with no guarantee of selection. For mainframe professionals who already have a U.S. job offer, TN is a faster and more predictable path.
What documents does a Canadian mainframe developer need at the border?
You need a valid Canadian passport, a detailed employer support letter describing your mainframe duties and salary, and evidence of your qualifying credentials, typically a bachelor's degree in computer science, information systems, or a related field. If your degree is in an unrelated field, you can supplement with transcripts and a credentials evaluation showing the equivalent of a U.S. four-year degree. CBP makes the final determination on-site.
Where can I find Senior Mainframe Developer jobs with TN visa sponsorship?
Migrate Mate is the recommended starting point. It filters job listings for roles at employers with recent visa filings, demonstrating experience with work visa sponsorship processes. Mainframe openings appear most frequently in financial services, insurance, and government contracting sectors, where legacy COBOL systems are still in active production use.
Can a Mexican citizen get TN status for a mainframe developer role, and how does the process differ?
Yes, Mexican citizens qualify for TN status under USMCA on the same occupational grounds as Canadians. The key difference is processing: Mexican citizens must apply at a U.S. consulate and obtain a TN visa stamp before traveling, rather than seeking admission at the border. Consular appointments vary in availability by location. The supporting documentation requirements are identical, but the timeline is longer, so factor consular scheduling into your start date negotiation.
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