Server Administrator III

Agile Defense•Huntsville, AL

6d•Onsite

About The Position

Agile Defense is seeking a senior systems administrator to design, deploy, administer, secure, and maintain enterprise infrastructure and mission-critical applications across hybrid Windows, Linux, virtualization, and containerized environments. The role supports the Office of the Chief Information Officer (OCIO), which provides IT support to PAE FIRES and its data center hosting services for organizations throughout the U.S. Army Acquisition community. The primary focus is enterprise applications, OpenShift, Kubernetes, GitOps, VMware, and infrastructure engineering. The successful candidate will independently troubleshoot complex infrastructure and application issues, implement enterprise solutions, and collaborate with cybersecurity, networking, development, and server teams. They will own complex infrastructure and application solutions throughout their lifecycle, from architecture and implementation through sustainment, upgrades, security compliance, and troubleshooting, and act as a senior escalation resource across enterprise technology platforms. This is a 100% onsite position at Redstone Arsenal, Alabama. The contractor site may require 0–10% travel and occasional off-hours work to support releases and outages. The work is generally sedentary in an office environment, with occasional standing and walking and lifting up to 10 pounds. An active Secret clearance is required to start; Security+ CE is required at start according to the qualifications section, while the listing header also states certification within six months.

Requirements

High school diploma or GED.
At least 7 years of progressive systems administration, infrastructure engineering, or platform engineering experience.
Active Secret security clearance, required to start.
Security+ CE certification; the posting lists it as required at start and also says within six months in the requisition header.
Advanced experience administering Windows Server and Red Hat Enterprise Linux.
Hands-on experience with Red Hat OpenShift or enterprise Kubernetes environments.
Experience implementing GitOps deployments using Argo CD and Git.
Experience deploying and administering Kubernetes workloads and OpenShift Operators.
Strong VMware vSphere administration experience, including ESXi and vCenter.
Experience with VMware Cloud Foundation or equivalent enterprise virtualization architecture.
Experience deploying and troubleshooting enterprise applications, including IIS-hosted applications.
Working knowledge of SAML, OIDC, OAuth, LDAP, Active Directory, PKI, and TLS.
Experience with enterprise patch management, vulnerability remediation, and security hardening.
Strong troubleshooting skills across operating systems, applications, networking, storage, and authentication.
Experience developing automation using PowerShell, Bash, or similar scripting languages.
Ability to independently lead technical implementations and resolve complex infrastructure problems.
Ability to own complex infrastructure and application solutions through architecture, implementation, sustainment, upgrades, security compliance, and troubleshooting.
Strong technical judgment and ability to identify architectural and operational risks.

Nice To Haves

Red Hat Certified Engineer (RHCE), Red Hat OpenShift certification, or Certified Kubernetes Administrator (CKA).
VMware VCP-VCF or equivalent VMware certification.
CompTIA Security+, CASP+/SecurityX, CISSP, or equivalent security certification.
Experience supporting DoD enterprise infrastructure and DISA STIG compliance requirements.
Experience with F5 BIG-IP load balancing, TLS termination, reverse proxy, and application delivery.
Experience with GitLab, Jira, Confluence, and enterprise DevSecOps platforms.
Familiarity with Ansible Automation Platform, Terraform, Helm, Kustomize, and CI/CD pipelines.
Knowledge of PostgreSQL, Microsoft SQL Server, and enterprise database integration.
Experience supporting disconnected, restricted, or highly secured environments.

Responsibilities

Design, deploy, administer, and troubleshoot Red Hat OpenShift and Kubernetes environments.
Implement and maintain GitOps workflows using Argo CD, Git repositories, and declarative configuration management.
Deploy, configure, upgrade, and troubleshoot OpenShift Operators, including Operator Lifecycle Manager and OperatorHub integrations.
Manage containerized applications and Kubernetes resources, including deployments, StatefulSets, services, routes, ingress, ConfigMaps, Secrets, and persistent storage.
Maintain Helm charts, Kustomize configurations, and Kubernetes manifests; troubleshoot container networking, DNS, certificates, storage, resource use, and application availability.
Manage cluster upgrades, Operator compatibility, application lifecycle processes, RBAC, security contexts, and enterprise authentication integrations.
Administer VMware vSphere, ESXi, vCenter Server, and VMware Cloud Foundation environments; provision, upgrade, patch, optimize, and manage capacity for virtual infrastructure.
Troubleshoot virtualization, storage, networking, and high-availability issues; support vSAN, distributed networking, resource allocation, and virtual machine lifecycle management.
Coordinate infrastructure maintenance, backup, disaster recovery, and service restoration while maintaining security-baseline compliance.
Design, install, configure, integrate, and maintain enterprise applications hosted on Windows, Linux, virtual machines, and container platforms.
Administer Microsoft IIS, including application pools, HTTPS bindings, certificates, and application authentication.
Deploy and support enterprise applications such as GitLab, Jira, Confluence, and commercial or custom software platforms.
Configure application connectivity, reverse proxies, load balancing, DNS, TLS/SSL, and backend service integrations; troubleshoot availability, performance, connectivity, dependencies, and compatibility.
Coordinate application upgrades, vulnerability remediation, vendor support, and release management; support application database connectivity, configuration, backup, and recovery.
Design, implement, and troubleshoot enterprise authentication and authorization, including SAML 2.0, OIDC, OAuth 2.0, LDAP, Active Directory, centralized identity providers, and SSO platforms.
Manage PKI, X.509 certificates, certificate chains, and TLS configurations; troubleshoot authentication, identity claims, token validation, and access-control issues.
Implement RBAC, multifactor authentication, and least-privilege access principles.
Administer Windows Server and RHEL environments; plan, test, and execute operating system, hypervisor, application, and infrastructure patching.
Maintain Red Hat Satellite repositories, content views, software packages, and lifecycle environments.
Implement and maintain DISA STIGs, security baselines, and vulnerability remediation requirements; investigate vulnerabilities and coordinate corrective actions.
Troubleshoot system services, performance, logs, resource utilization, and network connectivity; maintain technical documentation, standard operating procedures, and recovery procedures.
Develop and maintain automation using PowerShell, Bash, YAML, and infrastructure-as-code tools; implement repeatable deployments through GitOps and automation frameworks.
Build monitoring, logging, and alerting capabilities to improve availability and troubleshooting.
Provide technical guidance, escalation support, and mentorship to junior and mid-level administrators.