Facilities Maintenance Technician

Why Castelion, Why Now

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability.

This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function.

Facilities Maintenance Technician

We are seeking a skilled Facilities Equipment Maintenance Technician to support the maintenance and operational integrity of our facilities. You will perform preventive maintenance and troubleshoot a wide range of equipment, including CNC machines, furnaces, vacuum systems, thermal chambers, as well as facility building systems (compressed air, HVAC, gates, rollup doors, etc.). You will diagnose and repair electrical, mechanical, and controls issues down to the component level, from PLCs and servomotors to actuators and gearboxes.

The ideal candidate will demonstrate a proactive approach to problem-solving, a strong commitment to safety, and the ability to work independently within a fast-paced, mission-driven environment.

Key Responsibilities

• Maintain and repair all critical equipment to ensure their proper operating condition
• Perform weekly scheduled preventive maintenance on production and Infrastructure equipment to prevent breakdown and maintain equipment reliability
• Strong ability to troubleshoot and diagnose mechanical, electrical, and controls system issues down to the component level promptly to minimize downtime.
• Read and utilize equipment maintenance manuals, schematics, and drawings (electrical, mechanical, pneumatic, hydraulics)
• Open, track, and resolve work order tickets through internal CMMS system
• Assist in managing site-wide operations and maintenance programs as assigned
• Safely operate forklifts, scissor lifts, and boom lifts when necessary.

Basic Qualifications

• High school diploma or equivalent.
• Minimum of 5+ years of experience in facilities maintenance in a manufacturing or production environment
• Hands-on experience repairing mechanical, electrical, pneumatic, or hydraulic systems
• Must be able to pass background checks as required by job site regulations
• Ability to read electrical and mechanical schematics
• Ability to lift up to 35 lbs unassisted.
• Physical ability to stand for extended periods and perform tasks involving bending, climbing ladders, grasping, pulling, pushing, stooping, and stretching.
• Comfortable working at elevated heights (up to 100 feet) and using ladders or aerial lifts.

Preferred Skills and Experience

• Minimum of 10+ years of experience in facilities maintenance in a manufacturing or production environment

• Maintenance experience on CNC machines such as Doosan(DN Solutions), Haas, and manual lathes/mills
• Maintenance experience on electric furnaces/ovens, vacuum systems, environmental thermal testing chambers.
• Familiarity with a CMMS platform (eMaint, Maximo, or similar) and Jira Ticketing system

Castelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details.

Other Duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

Additional Eligibility Requirements

This position may require access to classified information or restricted U.S. Government sites, systems, or information, as determined by the Company and/or applicable U.S. Government requirements. If the position is so designated, your employment in the role may be contingent upon your ability to obtain and maintain the required U.S. Government security clearance or other government authorization, and to satisfy any citizenship or other eligibility requirements imposed by applicable law, regulation, executive order, or government contract requirements. You will be notified if and when such requirements apply.

Affirmative Action/EEO Statement

Castelion is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.

Castelion is committed to providing reasonable accommodations to qualified individuals with disabilities throughout the application and hiring process. If you require a reasonable accommodation to complete an application, participate in the interview process, or otherwise participate in the hiring process, please contact View email address on click.appcast.io. Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law.

Castelion is committed to fostering a workplace where employment decisions are based on qualifications, business needs, and the ability to perform the essential functions of the role, with or without reasonable accommodation.

EAR/ITAR Requirements

This position requires access to export-controlled information, and as such, employment (or hiring of a contractor) is contingent upon the candidate’s ability to access all applicable export-controlled information without additional export licensing being required by the Bureau of Industry and Security and/or the Directorate of Defense Trade Controls.