Server Administrator III

Server Administrator III
Company: Agile Defense
Location: Redstone Arsenal, AL
Team: Service Operations
Type: Regular
About Agile Defense
At Agile Defense we know that action defines the outcome and new challenges require new solutions. That’s why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next.
Our vision is to bring adaptive innovation to support our nation's most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility—leveraging a foundation of speed, flexibility, and ingenuity to strengthen and protect our nation’s vital interests.
Job Description
The Office of the Chief Information Officer (OCIO) provides Information Technology (IT) support to PAE FIRES which is a Continental United States (CONUS) organization. The OCIO provides centralized life cycle management, direction, guidance, and support for the acquisition, sustainment, maintainability, supportability, and implementation of the PAE, Information Mission Area (IMA). PAE FIRES is an approved Data Center providing hosting to multiple organizations throughout the US Army Acquisition community.
We are seeking an experienced 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 ideal candidate will possess advanced technical expertise in Red Hat OpenShift, Kubernetes, GitOps automation, VMware Cloud Foundation (VCF), enterprise application deployment, authentication technologies, and infrastructure lifecycle management.
This position requires a highly technical, hands-on engineer capable of independently troubleshooting complex infrastructure and application issues, implementing enterprise solutions, and collaborating with cybersecurity, networking, development, and server teams.
Primary Focus: Enterprise Applications, OpenShift, Kubernetes, GitOps, VMware, and Infrastructure Engineering
JOB DUTIES AND RESPONSIBILITIES
OpenShift, Kubernetes, and GitOps
· 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 (OLM) and OperatorHub integrations.
· Manage containerized applications, deployments, StatefulSets, services, routes, ingress, ConfigMaps, Secrets, and persistent storage.
· Implement and maintain Helm charts, Kustomize configurations, and Kubernetes manifests.
· Troubleshoot container networking, DNS, certificates, storage, resource utilization, and application availability.
· Manage cluster upgrades, Operator compatibility, and application lifecycle processes.
· Implement role-based access control (RBAC), security contexts, and enterprise authentication integrations.
VMware and Enterprise Virtualization
· Administer and maintain VMware vSphere, ESXi, vCenter Server, and VMware Cloud Foundation (VCF) environments.
· Perform virtual infrastructure provisioning, upgrades, patching, performance optimization, and capacity management.
· Troubleshoot complex virtualization, storage, networking, and high-availability issues.
· Support VMware vSAN, distributed networking, resource allocation, and virtual machine lifecycle management.
· Coordinate infrastructure maintenance, backup, disaster recovery, and service restoration.
· Maintain infrastructure compliance with applicable security baselines and organizational requirements.
Enterprise Application Deployment and Administration
· Design, install, configure, integrate, and maintain enterprise applications hosted on Windows, Linux, virtual machines, and container platforms.
· Administer Microsoft Internet Information Services (IIS), including application pools, HTTPS bindings, certificates, and application authentication.
· Deploy and support enterprise applications such as GitLab, Jira, Confluence, and other commercial or custom software platforms.
· Configure application connectivity, reverse proxies, load balancing, DNS, TLS/SSL, and backend service integrations.
· Troubleshoot application availability, performance, connectivity, dependencies, and compatibility.
· Coordinate application upgrades, vulnerability remediation, vendor support, and release management.
· Support application database connectivity, configuration, backup, and recovery.
Identity, Authentication, and Access Management
· Design, implement, and troubleshoot enterprise authentication and authorization solutions.
· Configure and support SAML 2.0, OpenID Connect (OIDC), OAuth 2.0, LDAP, and Active Directory integrations.
· Integrate enterprise applications with centralized identity providers and single sign-on (SSO) platforms.
· Manage Public Key Infrastructure (PKI), X.509 certificates, certificate chains, and TLS configurations.
· Troubleshoot authentication failures, SAML assertions, identity claims, token validation, and access-control issues.
· Implement role-based access control, multifactor authentication, and least-privilege access principles.
Systems Administration, Security, and Patching
· Administer Windows Server and Red Hat Enterprise Linux (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 application and operating system vulnerabilities and coordinate corrective actions.
· Troubleshoot system services, performance issues, logs, resource utilization, and network connectivity.
· Develop and maintain technical documentation, standard operating procedures, and recovery procedures.
Automation and Engineering
· Develop and maintain automation using PowerShell, Bash, YAML, and infrastructure-as-code tools.
· Implement repeatable infrastructure and application deployments using GitOps and automation frameworks.
· Build monitoring, logging, and alerting capabilities to improve system availability and troubleshooting.
· Provide technical guidance, escalation support, and mentorship to junior and mid-level administrators.
QUALIFICATIONS
Required Certifications
Security+ce at start
Education, Background, and Years of Experience
High School Diploma/GED
7+ years of progressive systems administration, infrastructure engineering, or platform engineering experience.
ADDITIONAL SKILLS & QUALIFICATIONS
Required Skills
Active Secret Security Clearance
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 reso