Senior Systems Administrator Jobs in Texas

Primary Responsibilities:

• Manage and administer Linux (RHEL/Rocky) virtual machines across multi-site data center environments

• Operate and maintain OpenShift container platform (user management, workload troubleshooting, cluster health)

• Support AVI Vantage load balancer operations (virtual service configuration, pool management, SSL binding, health monitors)

• Develop and maintain Ansible playbooks for infrastructure automation (user management, security agent deployment, OS patching, SSH hardening)

• Fulfill daily infrastructure requests (VM provisioning, resource augmentation, access provisioning, troubleshooting)

• Manage hardware lifecycle activities (Dell iDRAC, decommission coordination, EOSL tracking)

• Deploy and maintain security agents across all hosts

• Manage SSL certificate lifecycle (renewals, installation, expiration tracking)

• Support FreeIPA and Keycloak identity services (user provisioning, group management, authentication troubleshooting)

• Coordinate with vulnerability management to patch or mitigate findings on data center hosts

• Participate in on-call rotation for production infrastructure incidents

Required Qualifications:

• 5+ years of experience in enterprise Linux systems administration (RHEL 7/8/9, Rocky Linux)

• Strong working knowledge of Ansible for infrastructure automation (playbook development, roles, inventories, vault)

• Experience with container platforms - OpenShift or Kubernetes (cluster operations, user management, pod troubleshooting)

• Experience with application delivery controllers / load balancers (AVI Vantage preferred, F5 BIG-IP acceptable)

• Hands-on experience with Dell PowerEdge server hardware management (iDRAC, OpenManage, BIOS/firmware updates)

• Familiarity with virtualization platforms and VM lifecycle management (ManageIQ, VMware, or similar)

• Experience with identity management systems (FreeIPA, LDAP, Keycloak, or Active Directory)

• Understanding of SSL/TLS certificate management and PKI concepts

• Proficiency with Git for version control - comfortable with branching, merge requests, and collaborative workflows (GitLab preferred)

• Experience working in multi-site data center environments

• Foundational knowledge of cloud platforms (AWS or GCP) - understanding of core services (compute, networking, storage, IAM) and how on-prem infrastructure maps to cloud equivalents

• Strong troubleshooting skills across network, OS, and application layers

• Ability to work independently, manage a queue of requests, and prioritize effectively

Preferred Qualifications:

• Experience with AVI Vantage specifically (virtual services, pools, health monitors)

• Experience with Splunk Forwarder deployment and log pipeline configuration

• Exposure to vulnerability management workflows

• Experience with Jira for work tracking and request management

• Familiarity with hardware lifecycle planning (EOSL tracking, refresh coordination, capacity planning)

• Python scripting for operational automation and reporting

• Understanding of network fundamentals (VLANs, routing, firewall rules, DNS)

• Experience supporting Cisco UCS or Dell EMC Unity storage platforms

• Hands-on experience migrating workloads from on-prem to AWS or GCP (lift-and-shift or re-platform)

• Familiarity with Infrastructure as Code for cloud (Terraform, CloudFormation, or Deployment Manager)

• Experience with cloud-native container orchestration (EKS, GKE) in addition to on-prem OpenShift

• EnableSkinIGERscertifications (Associate level or higher)

The pay range that the employer in good faith reasonably expects to pay for this position is $27.74/hour - $43.34/hour. Our benefits include medical, dental, vision and retirement benefits. Applications will be accepted on an ongoing basis.

Tundra Technical Solutions is among North America’s leading providers of Staffing and Consulting Services. Our success and our clients’ success are built on a foundation of service excellence. We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Unincorporated LA County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: client provided property, including hardware (both of which may include data) entrusted to you from theft, loss or damage; return all portable client computer hardware in your possession (including the data contained therein) upon completion of the assignment, and; maintain the confidentiality of client proprietary, confidential, or non-public information. In addition, job duties require access to secure and protected client information technology systems and related data security obligations.