Systems Administrator Journeyman with Security Clearance

Career Opportunities with Castalia Systems A great place to work. Careers At Castalia Systems Current job opportunities are posted here as they become available. Back To Openings Systems Administrator, Journeyman Location:
Fort Shafter, HI START YOUR APPLICATION Job Type: Full- Time Workplace Type: Onsite Clearance: TS/SCI Must be a U.S. Citizen Job Summary Castalia Systems is seeking a Journeyman Systems Administrator, to support our client onsite at Fort Shafter, HI. Roles and Responsibilities A qualified candidate will perform the following duties and responsibilities, but are not limited to:

• 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: including creating, enabling, provisioning and deactivating user accounts.
• Monitor system performance, troubleshoot and resolve hardware/software issues, optimizing network performance, manage system backups and recovery processes, and implement necessary upgrades and patches. Required Qualifications
• 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 skills and communication skills, with the ability to interact effectively with both technical and non-technical users and collaborate across multiple teams and external entities.
• 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 and resolving hardware/software issues, optimizing network performance, managing system backups and recovery processes, and implementing necessary upgrades and patches.
• Ability to install, configure, administer, manage, and maintain network infrastructure (e.g., routers, switches, firewalls) and Windows physical and virtual server environments/operating systems.
• Experience with managing user accounts, permissions, and access controls across various systems, networks, and applications: including creating, enabling, provisioning and deactivating user accounts.
• CompTIA Security+ and/or DoD 8570-compliant IAT Level II Certification.

Preferred 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). Physical Requirements/Work Environment
• Normal office environment. Travel
• Less than 5%.

Company Description Castalia Systems is a proven business partner providing mission critical solutions to the Federal Government. We provide cutting edge solutions from Securing and Managing Data to Systems Engineering and Development. Castalia Systems is a pioneer in Artificial Intelligence Design and Application. With our vast knowledge of our customers’ needs and relevant technology, our team is able to bring successful solutions to every mission.

We are one-upping our competitors by providing premium IT solutions and platforms with cutting-edge technology so it’s so evident when you compare us with anyone. Compensation At Castalia Systems, we provide you with opportunities and choices and support your total well-being. Our benefits include: Medical, dental, vision coverage, 401k matching, generous PTO, paid holidays, professional training opportunities, and even pet insurance to ensure your furry friends are cared for too.

All regularly scheduled employees working at least 30 hours per week are eligible to participate in Castalia Systems’ benefit programs. Individuals that do not meet the threshold are only eligible for select offerings, not inclusive of health benefits. Salary at Castalia Systems is determined by various factors, including but not limited to location, position knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements. The projected compensation range for this position is $115,000.00 to $120,000.00 (annualized USD).

The estimate displayed represents the typical salary range for this position and is just one component of Castalia Systems’ total compensation package for employees. Disclaimer Castalia Systems is an equal employment opportunity and affirmative action employer and strives to comply with all applicable laws prohibiting discrimination based on race, color, creed, sex, sexual orientation, age, national origin, or ancestry, physical or mental disability, veteran status, marital status, HIV-positive status, as well as any other category protected by federal, state, or local laws.

All such discrimination is unlawful, and all persons involved in the operations of the company are prohibited from engaging in this type of conduct. Visit Our Home Page © 2026 Castalia Systems Applicant Tracking System