Senior Mainframe Systems Programmer Jobs in Connecticut

Position Title

Senior Systems Engineer – Linux (Project Implementation)

Position Summary

We are seeking a Senior Systems Engineer with deep expertise in UNIX, and Linux platforms to lead and deliver infrastructure and platform implementation projects supporting mission-critical environments.

This role is heavily focused on design, build, migration, modernization, and integration initiatives, rather than day-to-day operations. The ideal candidate will have a strong background in deploying enterprise systems, leading technical implementations, and driving infrastructure transformation efforts, particularly in hybrid UNIX/Linux ecosystems.

Key Responsibilities

• Lead and execute end-to-end infrastructure implementations, including system builds, migrations, upgrades, and decommissioning activities
• Design and deploy UNIX and Linux environments aligned with enterprise architecture standards
• Drive platform modernization initiatives, including OS upgrades, consolidation, and automation adoption
• Implement and integrate application server platforms (e.g., WebSphere, WebLogic) within high-availability architectures
• Perform environment build-outs for new applications, ensuring scalability, resilience, and performance requirements are met
• Collaborate with cross-functional teams (application, network, storage, security) to support project delivery and system integration
• Develop and execute deployment plans, runbooks, and cutover strategies for production releases
• Automate system provisioning and configuration using Ansible, shell scripting, or similar tools
• Conduct performance validation, tuning, and capacity planning during and after implementation
• Implement security controls, system hardening, and compliance requirements as part of build processes
• Support data center migrations, cloud/hybrid transitions, and platform transformations
• Produce and maintain engineering documentation, including build standards, architecture diagrams, and implementation guides
• Provide post-implementation knowledge transfer to operations teams and limited escalation support

You will be successful in this role if you have:

Required Qualifications

• BA/BS degree and 6-8 years’ relevant experience OR equivalent combination of education and experience
• Extensive hands-on experience with UNIX environments, with a strong focus on system build and deployment activities
• Proven experience delivering infrastructure or platform implementation projects in enterprise environments
• Strong expertise in Linux (RHEL, CentOS, or equivalent) in build, migration, and integration scenarios
• Experience with application server deployment and configuration (e.g., WebSphere, WebLogic)
• Demonstrated ability to execute system migrations, upgrades, and large-scale rollouts
• Experience with automation and Infrastructure as Code practices (Ansible, shell scripting, or similar)
• Solid understanding of system performance tuning, validation, and troubleshooting during project delivery
• Familiarity with enterprise security standards and implementation of hardened builds
• Experience working in regulated or highly controlled enterprise environments
• Knowledge of virtualization platforms (e.g., VMware) and enterprise storage solutions

Preferred Qualifications

• Experience with IBM Power Systems and AIX-specific project implementations
• Exposure to cloud or hybrid infrastructure deployments (Azure, AWS)
• Familiarity with CI/CD pipelines and DevOps practices
• Experience in data center migrations or workload relocations
• Knowledge of ITIL change and release management processes

Key Competencies

• Strong project execution and delivery mindset
• Ability to translate requirements into technical designs and implementation plans
• Excellent troubleshooting and problem-solving during high-impact deployments
• Effective collaboration with multiple engineering and application teams
• Proactive approach to automation and continuous improvement

Benefit Highlights:

Unisys offers an outstanding benefits package, featuring unlimited paid time off, a 401(k) match, comprehensive healthcare, HSA matching, ongoing learning opportunities, and more! We’re committed to supporting work-life balance and investing in your future success.

Video Interview Notice:

At Unisys, we incorporate video interviews as a key part of our hiring process. This allows us to get to know you better and provide a more engaging and convenient interview experience. We appreciate your understanding and look forward to connecting with you virtually!

This role may require access to export-controlled commodities and technology. Therefore, to conform to U.S. export control regulations, applicant should be eligible for any required authorizations from the U.S. Government.

Unisys is proud to be an equal opportunity employer that considers all qualified applicants without regard to age, caste, citizenship, color, disability, family medical history, family status, ethnicity, gender, gender expression, gender identity, genetic information, marital status, national origin, parental status, pregnancy, race, religion, sex, sexual orientation, transgender status, veteran status or any other category protected by law.

This commitment includes our efforts to provide for all those who seek to express interest in employment the opportunity to participate without barriers. If you are a US job seeker unable to review the job opportunities herein, or cannot otherwise complete your expression of interest, without additional assistance and would like to discuss a request for reasonable accommodation, please contact our Global Recruiting organization at GlobalRecruiting@unisys.com or alternatively Toll Free: 888-560-1782 (Prompt 4). US job seekers can find more information about Unisys’ EEO commitment here.