Senior Mainframe Systems Engineer | High Availability & DR

Socket.dev; United States; Remote; USD 120,000 - 160,000; Full time

Job summary

Socket.dev is seeking a Senior Systems Engineer to design, implement, and support enterprise mainframe infrastructure. You will lead initiatives across IBM zSystems, z/OS, storage and networking, ensuring high availability, security and performance for mission‑critical operations.

You will mentor engineers, collaborate with cross‑functional teams and partners, plan upgrades, disaster recovery, and modernization projects, and maintain documentation and standards to drive reliable, scalable

Qualifications

• Extensive experience supporting enterprise mainframe environments.
• Strong knowledge of IBM zSystems, z/OS, storage, networking, and related technologies.
• Experience with performance tuning, automation, disaster recovery, and infrastructure modernization initiatives.
• Strong analytical, problem-solving, and communication skills.
• Ability to manage multiple priorities and work effectively in a collaborative environment.

Responsibilities

• Design, implement, and support IBM mainframe and related infrastructure technologies.
• Monitor system performance, availability, capacity, and security to ensure operational excellence.
• Lead technical troubleshooting and resolution of complex system issues.
• Plan and execute infrastructure upgrades, migrations, disaster recovery, and business continuity initiatives.
• Develop and maintain system documentation, standards, and operational procedures.
• Provide technical guidance and mentoring to engineers and support teams.
• Collaborate with stakeholders to evaluate requirements and recommend technology solutions.
• Ensure compliance with organizational policies, regulatory requirements, and industry best practices.
• Participate in project planning, solution architecture, and customer engagements as needed.

Skills

Mainframe experience

IBM zSystems

z/OS

Performance tuning

Disaster recovery

Analytical skills

Communication

Tools

IBM zSystems

z/OS

Storage

Networking

Job description

Socket.dev is seeking a Senior Systems Engineer to design, implement, and support enterprise mainframe infrastructure. You will lead initiatives across IBM zSystems, z/OS, storage and networking, ensuring high availability, security and performance for mission‑critical operations.

You will mentor engineers, collaborate with cross‑functional teams and partners, plan upgrades, disaster recovery, and modernization projects, and maintain documentation and standards to drive reliable, scalable