Location : Phoenix, AZ Salary : Depends on Experience Description :
Position Overview
Our client is seeking an experienced Senior Linux Administrator to support a mission-critical research environment that directly enables world-class research. This is a senior individual-contributor role requiring deep technical expertise in Red Hat Enterprise Linux ecosystems (Rocky Linux, RHEL, CentOS), automation, and operational excellence in a highly collaborative non-profit research setting. This position is located within a group otherwise engaged in management of Windows-based directory services and Nutanix virtual environments, that is transitioning to a more DevSecOps automated operations regime.
Required Qualifications
- Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent professional experience)
- W2 Only
- 7+ years of hands-on Linux systems administration experience in production environments
- Extensive experience with Rocky Linux and other Red Hat-based distributions
Core Technical Competencies
Expert-level administration of Rocky Linux / RHEL including :
Systems service managementPackage management (dnf / yum)Filesystem administration and optimization (ext4, XFS, LVM)Security hardening and compliance (CIS benchmarks, SELinux, firewalld)SSSD and Active Directory realm bindingPatch management strategies and executionKernel, filesystem, and network performance tuningStrong proficiency in core networking concepts and protocols, including :
In-depth understanding of the TCP / IP stack and packet flowIPv4 / IPv6 addressing, subnetting, VLSM, and CIDR notationStatic and dynamic routing principles (OSPF, BGP, EIGRP experience a plus)Configuration and troubleshooting of DHCP, DNS (including BIND and authoritative / resolver roles), and related servicesVLANs, trunking (802.1Q), and Layer 2 / Layer 3 switching fundamentalsCommon network services and protocols (NTP, SNMP, ICMP, ARP, etc.)Packet analysis using tools such as tcpdump and WiresharkMonitoring : Nagios / Core administration, check development, and maintenance
DevOps and automation : Ansible (playbook development, inventory management, large-scale automation)
Container technologies (Docker / Podman) - build, optimization, troubleshooting Kubernetes and Red Hat OpenShift experience
Strong scripting capability : Bash, sed, awk, grep (must be able to develop and debug complex scripts)
Preferred Skills & Experience
Administration of NetBox or similar CMDB / IPAM solutionsGitLab administration and CI / CD pipeline experiencePerl and Python scripting (including REST API integrations)Cohesity backup platformNutanix AHV and VM managementWorking knowledge of Active Directory and Windows Server supportFamiliarity with Atlassian tools (Jira, Jira Service Management, Confluence, JSM Assets)Key Responsibilities
Proactively monitor, maintain, and troubleshoot Linux-based research computing systems serving premier biomedical researchersProvide white-glove, courteous, and clear technical support via ticket system and direct researcher interactionPartner with DevSecOps and InfoSec team members to create, enhance, and harden automation of Linux system managementOwn and continuously improve Standard Operating Procedures (SOPs) in ConfluenceActively participate in weekly Change Control process using Jira Service ManagementMaintain accurate, real-time infrastructure documentation and asset records in NetBox and JSM Assets; coordinate with Finance for federal grant complianceTrack daily tasks, projects, and deliverables in Jira; participate in monthly workload reviewCollaborate closely with DevSecOps, Network, Windows, HPC and Information Security teams to resolve complex incidentsOffer guidance and mentorship to other technical staff to learn Linux system administration and related technologies and skillsetsBy providing your phone number, you consent to : (1) receive automated text messages and calls from the Judge Group, Inc. and its affiliates (collectively "Judge") to such phone number regarding job opportunities, your job application, and for other related purposes. Message & data rates apply and message frequency may vary. Consistent with Judge's Privacy Policy, information obtained from your consent will not be shared with third parties for marketing / promotional purposes. Reply STOP to opt out of receiving telephone calls and text messages from Judge and HELP for help.