EHS 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.  

About Castelion:   

Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We’re designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts. 

Position Summary:   

The Environmental, Health & Safety (EHS) Technician provides hands on field support to manufacturing, R&D, and test operations by performing the day-to-day tasks that keep EHS programs running. This role reports directly to the EHS Manager and works in tandem with the EHS Specialist to cover the site, sharing field workload and coordinating daily priorities. 

The EHS Technician spends most of the workday on the production floor and in test areas conducting inspections, servicing and staging safety equipment, handling hazardous materials and waste to accumulation area, and supporting training delivery. This role executes established program requirements instead of developing them, escalates hazards to the EHS Manager, and reinforces safe work practices in a fast paced, high hazard environment. Castelion is seeking an individual who with the ability to collaborate with area owners to reduce safety risks across multiple departments.  

Responsibilities:   

• Perform daily and weekly walkthroughs of manufacturing, R&D, and test areas using approved checklists, documenting findings. Partner with EHS team on hazard identification and control selection. 

• Coordinate daily and weekly coverage with the EHS Specialist so inspections, training, open ticket items, and field support are divided across the site without gaps or duplication.  

• Verify condition and availability of PPE, lockout devices, eyewash and shower stations, fire extinguishers, and spill kits. 

• Triage and maintain hazardous waste accumulation areas to include satellite area upkeep and staging containers for scheduled waste shipments. 

• Assist employees with secondary container labeling and chemical storage segregation, maintenance of chemical inventory, to support hazard communication requirements. 

• Support with on-site response actions where directed. 

• Coordinate EHS training logistics including, room and material setup, attendance tracking, and records filing. 

Basic Qualifications:   

• High school diploma or equivalent, and one of the following: 

• Associates degree or technical certificate in occupational health and safety, environmental science, industrial hygiene, or a related technical field 

• Completion of a recognized EHS certificate program, military safety technical training, or apprenticeship 

• Additional directly applicable hands on EHS experience in lieu of formal post-secondary education 

• One to three years of hands on EHS, industrial hygiene, environmental, or safety support experience in manufacturing, research and development, construction, or industrial environment 

• Familiarity with basic OSHA and Cal-OSHA workplace safety requirements 

• Ability to accurately complete inspection forms, logs, and recordkeeping documentation 

• Comfortable working on a production floor and in outdoor test environments, including standing, walking, climbing ladders, and lifting up to 50 pounds 

• Ability to wear required PPE, including respiratory protection 

• Ability to meet U.S. export control requirements (ITAR or EAR) 

Preferred Skills and Experience:   

• Associate’s degree in occupational health and safety, environmental science, or industrial hygiene 

• Two to four years of EHS experience in aerospace, defense, manufacturing, or another high hazard industry 

• OSHA 10 or OSHA 30, DOT hazmat shipping, forklift, RCRA certifications, or first aid/CPR certifications 

• Experience managing hazardous waste accumulation areas under RCRA or California hazardous waste requirements 

• Experience working in a startup or fast paced environment 

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 [email protected]. 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.