Position Overview

ActioNet is seeking a System Administrator to provide hands-on systems administration and infrastructure support in a secure, classified environment at Yokota Air Base, Japan. This is a highly technical, mission-focused position responsible for installing, configuring, securing, troubleshooting, and maintaining Windows and Linux systems, networks, applications, and associated infrastructure.

The System Administrator will build and maintain systems from bare metal, manage authentication services, perform backups, monitor security events, troubleshoot hardware and software failures, and ensure systems remain compliant with DoD and Intelligence Community security requirements. The role also supports cybersecurity initiatives, automation, infrastructure-as-code, documentation, system optimization, and distributed infrastructure.

The successful candidate is a hands-on, independent problem solver who can work directly with customers, prioritize competing requirements, and operate effectively in a fast-paced, mission-critical environment.

Key Responsibilities

• Provide hands-on onsite system administration and technical support in a classified environment.
• Install, configure, operate, maintain, and troubleshoot servers, workstations, network equipment, applications, and related infrastructure.
• Configure and manage Windows and Linux operating systems, including Red Hat Enterprise Linux.
• Build and configure systems from bare metal in accordance with approved security baselines and accredited configurations.
• Configure and manage DoD and Intelligence Community standard authentication services.
• Configure and troubleshoot IP addressing, subnets, switches, DNS, DHCP, LDAP, and related network services.
• Perform security monitoring and assist with identifying and responding to potential security incidents.
• Conduct daily backup operations, file archival, and data purging as required.
• Create, modify, and delete user accounts in accordance with approved requests and procedures.
• Perform system performance tuning, hardware upgrades, resource optimization, and lifecycle maintenance.
• Diagnose and recover from hardware and software failures across multiple sites.
• Maintain system documentation, configuration records, procedures, and technical guides.
• Support implementation and documentation of cybersecurity program requirements and security controls.
• Maintain facility video distribution systems and associated displays.
• Develop simple automation and scripts using PowerShell, Bash, and Python.
• Automate installation, configuration, provisioning, and system management using tools such as Ansible, Puppet, Terraform, and Chef.
• Work with technologies such as Kubernetes, Rancher, Grafana, ACAS, and Cloud Security Gateway.
• Support distributed systems and infrastructure technologies such as Hadoop, HBase/Accumulo, Spark, and Kafka as applicable.
• Use Agile management and collaboration platforms such as Jira, Confluence, and GitLab.
• Provide technical guidance and contribute to system documentation and knowledge-sharing materials.
• Work directly with government customers and other technical stakeholders.
• Support surge requirements, special projects, break/fix activities, and other mission requirements as assigned.

Required Qualifications

• 5+ years of professional experience administering, implementing, configuring, operating, and troubleshooting complex computer systems, servers, networks, and electronic IT infrastructure.
• Strong experience administering Windows and Linux environments.
• Experience with Red Hat Enterprise Linux, preferably RHEL 7/8 or later.
• Experience with server-side technologies and networked computing environments.
• Knowledge of U.S. Government computer networks, security requirements, and classified environments.
• Working knowledge of DNS, DHCP, LDAP, Kickstart, networking, authentication services, and security monitoring.
• Ability to troubleshoot complex hardware, operating system, application, and network problems.
• Ability to create basic PowerShell, Bash, or Python scripts.
• Experience with automation and Infrastructure-as-Code tools such as Ansible, Terraform, Puppet, or Chef.
• Understanding of security concepts including SSH, public-key encryption, credentials, certificates, TLS, and data encryption.
• Ability to work independently while effectively communicating with customers and technical teams.
• Strong analytical, critical-thinking, troubleshooting, and problem-solving skills.
• Excellent written and verbal communication skills.
• Ability to dynamically prioritize multiple workloads and mission-critical deadlines.
• Ability to document technical procedures clearly and accurately.
• Willingness and ability to learn new technologies and systems.
• Ability to work onsite in a secure facility and support changing mission requirements.

Required Certification

Candidates must possess an IAT Level II certification in accordance with DoD 8570/8140 requirements.

Examples of qualifying IAT Level II certifications include:

• CompTIA Security+
• CompTIA CySA+
• CompTIA CASP+/SecurityX
• CCNA Cyber Ops
• SSCP
• GSEC
• Other DoD-approved IAT Level II certifications

Candidates must also maintain any required Operating System/Computing Environment (OS/CE) certification applicable to the systems they support.

Security Clearance & Citizenship

• U.S. Citizenship is required.
• Active TS/SCI security clearance is required.
• Active CI Polygraph is required, or candidate must be able to successfully obtain one.
• Candidates must meet all U.S. Government requirements for access to classified information and secure facilities.
• Additional eligibility requirements may apply based on mission and customer requirements.

Work Environment & Schedule

• 100% onsite at Yokota Air Base, Japan.
• This position requires regular presence in a secure/classified facility.
• Remote work is not a standard option and may only be permitted for limited, short-duration activities when specifically authorized by the customer.
• Work schedules may vary based on customer requirements, mission priorities, operational needs, and critical events.
• Ability to support surge hours, after-hours requirements, or emergency break/fix activities when necessary.

Travel

• Travel may be required in support of remote installations, break/fix activities, or other mission requirements.
• Travel is expected to be less than 10%.

Physical Requirements

• Ability to work in a computer/equipment lab and general office environment.
• Ability to use a computer, keyboard, and mouse for extended periods.
• Ability to work with and troubleshoot various IT and electronic equipment.
• Ability to support equipment installation, maintenance, and troubleshooting activities.

Preferred Qualifications

• Experience supporting DoD, Intelligence Community, or other U.S. Government environments.
• Experience working in an OCONUS military environment.
• Familiarity with Joint IO Range, Defense Research and Engineering Network, or similar government network environments.
• Experience with Kubernetes, Rancher, Grafana, ACAS, or Cloud Security Gateway.
• Experience with distributed technologies such as Hadoop, HBase/Accumulo, Spark, or Kafka.
• Experience with GitLab, Jira, Confluence, or similar Agile/DevSecOps platforms.
• Additional Linux, Windows, networking, cloud, or security certifications.

About ActioNetActioNet is a CMMI-DEV Level 4, CMMI-SVC Level 4, ISO 20000, ISO 27001, ISO 9001, HDI-certified, woman-owned IT solutions provider with 25+ years of stellar performance. Our expertise spans Agile Software Engineering, Cloud Solutions, Cybersecurity, and IT Managed Services.

With a 98% customer retention rate, ActioNet is proud to be named a Top Workplace for 11 consecutive years (2014–2024).Why ActioNet?At ActioNet, our Passion for Quality is at the heart of everything we do:Commitment to Employees: A great place to work with ongoing investment in our people.Commitment to Customers: Driving and sustaining service delivery excellence.Commitment to Community: Giving back and building a better world for future generations.What’s in It for You?