Senior Linux Infrastructure Engineer – Remote

Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by diversity and inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health equity on a global scale. Join us to start Caring. Connecting. Growing together.

 

Enterprise Technology Infrastructure, Platforms & Services (ETIPS) delivers services and operational support to meet business integration objectives. Architecture leadership to provide scalable, secure, and highly available infrastructure solutions to meet care delivery business needs and enable future business growth.

 

As a Senior Linux Infrastructure Engineer, you will play a critical role in managing and optimizing our High Performance Compute infrastructure environment. You will work with Linux, Kubernetes, and OpenStack environments to ensure the reliability, security, and efficiency of our systems. Your expertise in advanced Linux administration, networking, and automation will be essential in driving our projects forward.

 

You’ll enjoy the flexibility to work remotely * from anywhere within the U.S. as you take on some tough challenges.

 

Primary Responsibilities:

• Deploy and maintain Linux environments on High Performance Compute architecture using KVM hypervisor, Virtual Machines, and Kubernetes
• Automate infrastructure management and deployments using Ansible over hundreds of KVM hosts and thousands of VMs and K8s clusters
• Deploy and maintain Kubernetes clusters (OpenShift)
• Deploy and maintain OpenStack for on-prem VMs
• Monitor system performance and troubleshoot issues to ensure high availability and reliability
• Collaborate with development and application teams
• Ensure security best practices are followed and compliance requirements are met
• Document processes, configurations, and procedures
• Support evolution and enhancement of the overall architecture through future architecture design changes and new platform lifecycle management initiatives
• Troubleshooting and problem-solving skills including recovery of Linux systems and working with RedHat support, e.g. Single User Boot for emergency recovery
• Ability to work independently and as part of a team
• Ability to participate in on-call rotation

 

You’ll be rewarded and recognized for your performance in an environment that will challenge you and give you clear direction on what it takes to succeed in your role as well as provide development for other roles you may be interested in.

Required Qualifications:

• 10+ years of experience in Linux administration / engineering including experience:
  • RedHat Linux administration and the KVM hypervisor including building KVM hypervisors and Linux VMs 
  • RedHat Openshift Kubernetes administration
  • Linux networking concepts such as macvtap and bonding in Linux.
  • Advanced Linux storage and file system concepts like LVM, dmcrypt, LUKS2, and IBM GPFS clustered file systems
• 5+ years of experience with Ansible for automation and configuration management
• 5+ years of experience creating automation scripts 

 

Preferred Qualifications: 

• RedHat Certified Engineer or similar certifications
• Experience with:
  • LinuxONE hardware platform and other High Performance Compute architectures
  • libvirt, qemu, virsh, domain XML for managing VMs on a KVM Linux host
  • OpenStack on-prem cloud for managing Virtual Machines.
  • Linux multipathd and general FCP/SAN zoning concepts 
  • Setting up rpm repos for yum updates/patching
  • centralized log aggregation, rsyslog, fluentd, splunk
  • Prometheus, AlertManager, Node Exporter FreeIPA (RedHat Identity Manager for Linux Single Sign On LDAPS and BIND DNS)
  • Grafana, Loki, HAProxy, and nginx
  • Firewalld, SELinux, fail2ban, LinuxAudit and other Linux security hardening techniques
  • Golang programming
• Understanding of certificates using Venafi, TLS, symmetric, and asymmetric cryptography concepts
• Familiarity with Linux environments in support of AI workloads such as GPU clusters for model fine tuning or model inference hosting of ML/DL models

 

*All employees working remotely will be required to adhere to UnitedHealth Group’s Telecommuter Policy.

 

California, Colorado, Connecticut, Hawaii, Nevada, New Jersey, New York, Rhode Island, Washington, Washington, D.C. Residents Only: The salary range for this role is $104,700 to $190,400 annually. Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. UnitedHealth Group complies with all minimum wage laws as applicable. In addition to your salary, UnitedHealth Group offers benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with UnitedHealth Group, you’ll find a far-reaching choice of benefits and incentives.  

Application Deadline: This will be posted for a minimum of 2 business days or until a sufficient candidate pool has been collected. Job posting may come down early due to volume of applicants. 

 

At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone–of every race, gender, sexuality, age, location and income–deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes — an enterprise priority reflected in our mission.

 

Diversity creates a healthier atmosphere: UnitedHealth Group is an Equal Employment Opportunity/Affirmative Action employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, national origin, protected veteran status, disability status, sexual orientation, gender identity or expression, marital status, genetic information, or any other characteristic protected by law.

 

UnitedHealth Group is a drug – free workplace. Candidates are required to pass a drug test before beginning employment.