Optum, part of UnitedHealth Group, is seeking an IO Engineer with deep expertise in Red Hat Enterprise Linux. In this role, you will support the design, implementation, and management of our Linux-based infrastructure, contributing directly to system reliability, performance optimization, and infrastructure modernization.

What You'll Do

Install, configure, and maintain Red Hat Enterprise Linux (RHEL) servers across production and non-production environments
Manage user accounts, access controls, sudo policies, and authentication services like LDAP, AD integration, SSSD, and Kerberos
Perform routine system updates, patching, kernel upgrades, and security hardening
Configure and troubleshoot system services including systemd, SELinux, firewalld, NTP, DNS, and DHCP
Monitor system health, performance, and capacity using enterprise monitoring tools
Manage storage, logical volumes, file systems (ext4, XFS), and network file services (NFS, SMB)
Support network configuration, routing, VLANs, bonding, and firewall rules
Automate operational tasks using Bash, Python, or Ansible
Participate in backup, recovery, and disaster-recovery planning and execution
Provide technical guidance to application teams and collaborate with security, network, and cloud engineering groups
Maintain accurate system documentation and operational procedures
Participate in on-call rotation as needed
Leverage enterprise-approved AI tools to enhance productivity and innovation by streamlining workflows and automating repetitive tasks

What We're Looking For

Strong technical expertise in Red Hat Enterprise Linux (RHEL) administration and enterprise operations
Proven experience with system security, automation, and performance optimization
Practical skills in managing authentication (LDAP, Active Directory, SSSD, Kerberos) and system services (systemd, SELinux, firewalld)
Experience with core infrastructure services like NTP, DNS, and DHCP
Hands-on experience with storage, file systems (ext4, XFS), and network file sharing (NFS, SMB)
Proficiency in scripting and automation with Bash, Python, or Ansible
Ability to monitor system health and capacity using enterprise tools
Strong collaboration skills to work with cross-functional teams
Commitment to maintaining thorough documentation
Willingness to participate in an on-call rotation

Technical Stack

Operating System: Red Hat Enterprise Linux (RHEL)
Scripting/Automation: Bash, Python, Ansible
Authentication/Security: LDAP, Active Directory, SSSD, Kerberos, SELinux, firewalld
Core Services: systemd, NTP, DNS, DHCP
Storage: ext4, XFS, NFS, SMB