Systems Administrator, Journeyman

About the role

Castalia Systems is seeking a Journeyman Systems Administrator to support the client onsite at Fort Shafter, HI. The position is full‑time, onsite, requires TS/SCI clearance and U.S. citizenship, with less than 5% travel.

Responsibilities

• Install, configure, administer, manage, and maintain network infrastructure (e.g., routers, switches, firewalls) and Windows physical and virtual server environments/operating systems.
• Manage user accounts, permissions, and access controls across various systems, networks, and applications: creating, enabling, provisioning and deactivating user accounts.
• Monitor system performance, troubleshoot and resolve hardware/software issues, optimize network performance, manage system backups and recovery processes, and implement necessary upgrades and patches.

Requirements

• Bachelor’s degree in Information Technology, Computer Science, or a related field (can substitute with Associate’s degree and 4 years of experience, or HS diploma and 6 years of experience).
• 3+ years of experience in system administration, network administration, or a related role.
• Excellent problem‑solving and communication skills; ability to interact with technical and non‑technical users and collaborate across teams.
• Experience managing multiple concurrent tasks, projects, and priorities to meet customer deadlines.
• Excellent organizational skills in maintaining documentation of system configurations and procedures, and providing reports on system performance, incidents, and maintenance activities.
• Experience providing technical support to end users: monitoring system performance, troubleshooting/resolving hardware/software issues, optimizing network performance, managing backups/recovery, implementing upgrades/patches.
• Ability to install, configure, administer, manage, and maintain network infrastructure (routers, switches, firewalls) and Windows physical/virtual server environments/operating systems.
• Experience managing user accounts, permissions, and access controls across systems, networks, and applications (creating, enabling, provisioning, deactivating).
• CompTIA Security+ and/or DoD 8570‑compliant IAT Level II Certification.

Qualifications

• Experience supporting the Intelligence Community or a DoD, Army, or Joint Staff classified program.
• Experience as a U.S. Army Information Management Officer and/or coordinating across multiple organizations including Signal Brigades, Army offices, INSCOM, DoD CIO, DIA, GISA, NEC.
• Ability to assist in planning and executing IT projects, such as system upgrades, migrations, or new technology deployments.
• Ability to communicate and work collaboratively with team members, government clients, and stakeholders across teams to problem solve and recommend and implement system improvements.
• Experience with Kanban, Agile, or project management applications and methodologies.
• Certified Information Systems Security Professional (CISSP), CompTIA Network+, or Information Technology Infrastructure Library (ITIL) certification(s).

Skills

• Problem‑solving
• Communication (technical and non‑technical audiences)
• Organizational and documentation abilities
• Multitasking and priority management
• Technical support and troubleshooting
• Network and Windows server administration
• User account and access control management

Benefits

• Medical, dental, and vision coverage
• 401k matching
• Generous paid time off (PTO)
• Paid holidays
• Professional training opportunities
• Pet insurance

Pay

Projected compensation range: $115,000.00 to $120,000.00 (annualized USD).

Schedule

Full‑time, onsite position with less than 5% travel.