Principal Mainframe Network Engineer z/OS VTAM & TCP/IP

UnitedHealth Group

Eden Prairie (MN)

On-site

Confidential

Full time

4 days ago

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Job summary

UnitedHealth Group, via Optum Tech, seeks a Principal Infrastructure & Operations Engineer focused on zSystems mainframe networking to join our enterprise infrastructure team. You will configure, tune, and optimize z/OS Communications Server environments, VTAM, TCP/IP, and file transfer protocols to ensure high availability, performance, and security.

This on-site role is based in Eden Prairie, MN, with on-call rotation and opportunities to leverage AI tooling for automation and operational

Qualifications

4+ years of mainframe network system programming experience.
10+ years of mainframe system programming experience with TSO/ISPF.
10+ years configuring z/OS Communications Server (VTAM, TCP/IP, TN3270).
5+ years of experience using network monitoring tools (e.g., NetView, MainView, OMEGAMON).
3+ years installing, configuring, and supporting Connect Direct / NDM.

Responsibilities

Configure, tune, and troubleshoot z/OS Communications Server components (VTAM, TCP/IP, TN3270, FTP).
Install and maintain Connect:Direct/NDM and native file transfer protocols (FTP, SFTP, FTPS).
Define, implement, and maintain Policy Agent configurations and OSA definitions.
Provide advanced troubleshooting and performance optimization using mainframe network tools.
Serve in an on-call rotation to support maintenance windows and weekend work.
Use enterprise-approved AI tools to streamline workflows and automate tasks.
Evaluate emerging AI trends for mainframe and LinuxOne to inform design.