System Administrator- Infrastructure & Cyber Operations - Huntsville, AL.

Davidson Technologies, Inc.•Huntsville, AL

8d•Onsite

About The Position

Davidson Technologies is seeking a System Administrator to support enterprise infrastructure, cybersecurity, virtualization, and systems operations across classified and unclassified environments. The role involves maintaining Windows and Linux systems, managing virtualization platforms, supporting cybersecurity compliance, performing patching and vulnerability remediation, and ensuring the operational readiness of infrastructure, network, and storage environments. The position requires strong troubleshooting skills, coordination with engineering and vendor teams, and the ability to support highly available mission systems.

Requirements

Experience administering Windows Server and Linux (RHEL) enterprise environments
Experience with VMware virtualization technologies including ESXi and vCenter
Knowledge of vulnerability management, STIG implementation, and cybersecurity compliance practices.
Experience with enterprise patch management and infrastructure lifecycle maintenance
Understanding of networking concepts including VLANs, ACLs, DNS, DHCP, and firewall administration
Experience troubleshooting enterprise infrastructure, virtualization, storage, and network environments
Ability to create and maintain technical documentation and operational procedures
Strong analytical, troubleshooting, and communication skills in a team-oriented environment

Nice To Haves

Experience with Splunk, Trellix ePO, Nessus/ACAS, SCC, and STIG remediation tools
Experience with Ansible, Terraform, DevOps tooling, and infrastructure automation
Experience supporting Kubernetes, Rancher, RKE2, and containerized environments
Knowledge of storage platforms such as PowerScale/Isilon
Experience with classified or DoD enterprise environments
Security+, RHCSA, VMware, or related certifications

Responsibilities

Install, configure, patch, troubleshoot, and maintain Windows Server, Windows 11, and Linux (RHEL 8/9) systems
Manage and maintain VMware ESXi, vCenter, VxRail, Horizon, and virtual machine infrastructure
Perform quarterly infrastructure patching activities for servers, virtualization platforms, networking equipment, and endpoint systems
Install, configure, and maintain Trellix/McAfee ePO infrastructure and endpoint protection agents
Deploy, configure, and troubleshoot Splunk infrastructure and forwarders to ensure centralized logging and monitoring
Conduct vulnerability scanning using Nessus/ACAS and remediate identified findings
Apply and maintain STIG configurations across Linux, Windows, VMware, and networking platforms
Support secure network segmentation through VLANs, ACLs, firewall configurations, and management network separation
Deploy, configure, and maintain new virtual machines, templates, golden images, and infrastructure services
Maintain Active Directory, Linux domain integration, Group Policy, RBAC controls, and service account administration
Support Kubernetes/RKE2 platforms, artifact repositories, and container registry operations
Perform backup, restore, and recovery operations for virtual machines, network devices, and storage systems
Manage certificates, PKI infrastructure, DNS, DHCP, IPAM, NTP, and authentication services
Monitor infrastructure health, system performance, storage utilization, and hardware lifecycle status
Coordinate hardware maintenance activities including firmware, BIOS, iDRAC/iLO, GPU, and driver updates
Provide troubleshooting and operational support during outages, incident response activities, and facility power events
Document system procedures, remediation activities, software licensing, and operational status tracking
Collaborate with cybersecurity, engineering, vendor, and program teams to integrate and sustain mission systems