Server Administrator III

Agile Defense•Redstone Arsenal, AL

4d•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 Windows, Linux, virtualization, and containerized environments. The role supports the Office of the Chief Information Officer (OCIO) and PAE FIRES, an approved data center hosting organizations throughout the U.S. Army Acquisition community. The position focuses on 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 infrastructure and application solutions throughout their lifecycle, from architecture and implementation through sustainment, upgrades, security compliance, and troubleshooting, and serve as a senior escalation resource. This is an onsite position at Redstone Arsenal, Alabama. A Secret clearance is required at start. Security+ CE is required at start according to the qualifications section; the posting also states the certification must be obtained within six months. The role is generally sedentary in an office environment, with possible off-hours work for releases and outages and 0–10% travel possible.

Requirements

High school diploma or GED.
At least 7 years of progressive systems administration, infrastructure engineering, or platform engineering experience.
Active Secret security clearance, with clearance required to start.
Security+ CE certification is required; the posting also says certification is required within six months.
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 performing 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 independently own complex infrastructure and application solutions throughout their lifecycle and serve as a senior escalation resource.

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, Kubernetes resources, Helm charts, Kustomize configurations, and manifests.
Troubleshoot container networking, DNS, certificates, storage, resource utilization, and application availability; manage cluster upgrades and application lifecycles.
Implement Kubernetes role-based access control, security contexts, and enterprise authentication integrations.
Administer VMware vSphere, ESXi, vCenter Server, VMware Cloud Foundation, and related virtualization components.
Provision, upgrade, patch, optimize, and capacity-manage virtual infrastructure; troubleshoot virtualization, storage, networking, and high-availability issues.
Coordinate infrastructure maintenance, backup, disaster recovery, and service restoration, and maintain compliance with security baselines.
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 applications such as GitLab, Jira, and Confluence, and configure connectivity, reverse proxies, load balancing, DNS, TLS/SSL, and backend integrations.
Troubleshoot application availability, performance, connectivity, dependencies, and compatibility; coordinate upgrades, vulnerability remediation, vendor support, and release management.
Support application database connectivity, configuration, backup, and recovery.
Design, implement, and troubleshoot authentication and authorization solutions, including SAML 2.0, OIDC, OAuth 2.0, LDAP, Active Directory, centralized identity providers, and SSO.
Manage PKI, X.509 certificates, certificate chains, and TLS configurations; troubleshoot authentication, identity claims, token validation, and access-control issues.
Implement role-based access control, multifactor authentication, and least-privilege access principles.
Administer Windows Server and Red Hat Enterprise Linux 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 and security baselines, investigate vulnerabilities, and coordinate remediation.
Troubleshoot system services, performance, logs, resource utilization, and network connectivity.
Develop and 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 using 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.