EHS Engineer

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.  

EHS Engineer

The Environmental, Health & Safety (EHS) Engineer provides hands-on and technical EHS support for Castelion's Midland manufacturing and test operations, including energetic material processing, mix and cast operations, equipment and process safety, and test activities.

This is a highly field-oriented role responsible for both the day-to-day execution of EHS programs and the technical evaluation of operational risk. The EHS Engineer will spend significant time where the work is performed, partnering directly with manufacturing, test, engineering, and facilities teams to identify hazards, develop practical controls, and ensure EHS requirements are effectively implemented.

The successful candidate will be comfortable moving between the field and technical discussions, whether conducting an inspection, supporting a test operation, investigating an incident, developing a JHA, or working with engineers to evaluate hazards associated with a new and evolving processes, equipment, etc.

Responsibilities

• Provide daily, hands-on EHS support for manufacturing, mix and cast, test, maintenance, and facility operations, maintaining a strong presence in operational areas.
• Identify and evaluate workplace and process hazards and partner with engineering and operations teams to develop practical engineering, administrative, and procedural controls.
• Lead and support risk assessments, including JHAs, PHAs, equipment/process reviews, and readiness assessments for new, modified, and higher-risk operations.
• Support new equipment, process changes, commissioning, and first-time operations by evaluating EHS risks and ensuring appropriate controls are established before work begins.
• Execute and maintain core EHS programs including LOTO, machine safety, PPE, respiratory protection, Hazard Communication, electrical safety, hot work, fall protection, material handling, and emergency preparedness.
• Conduct routine field inspections and operational walkdowns to verify controls are effective, identify emerging risks, and drive corrective actions to closure.
• Support energetic manufacturing and test activities by evaluating operational hazards and implementing requirements established through EHS and Energetics Safety reviews.
• Lead and support incident and near-miss investigations, identify root causes, develop corrective actions, and verify their effectiveness.
• Support industrial hygiene activities, including exposure assessments, sampling, evaluation of results, and implementation of exposure controls.
• Manage day-to-day environmental compliance activities including hazardous waste, chemical inventories, spill prevention, inspections, and required records.
• Support site compliance with applicable ATF explosives requirements, including routine inspections, explosives storage and inventory controls, required records, operational compliance, and corrective actions in coordination with EHS and Energetics Safety leadership.
• Develop and deliver EHS training and provide direct field coaching to employees, technicians, engineers, and supervisors.
• Develop and improve site procedures, JHAs, work instructions, and other EHS documentation based on operational needs and lessons learned.
• Serve as an accessible onsite EHS resource who can independently resolve routine issues, recognize when additional technical expertise is required, and escalate significant risks appropriately.

Basic Qualifications

• Bachelor's degree in engineering, occupational safety, environmental health and safety, industrial hygiene, environmental science, or a related technical field.
• 3+ years of EHS, safety engineering, manufacturing safety, process safety, or related experience in manufacturing, aerospace, defense, chemical processing, or other industrial environment.
• Working knowledge of OSHA requirements and common industrial EHS programs.
• Experience conducting hazard assessments, inspections, incident investigations, and corrective action management.
• Ability to understand manufacturing processes, equipment, and technical documentation and translate identified hazards into practical controls.
• Strong problem-solving, organizational, and communication skills.
• Comfortable working in field. and in outdoor test environments.
• Ability to work full-time onsite in Midland, Texas and support operations outside normal business hours when required
• Ability to meet U.S. export control requirements (ITAR or EAR)

Preferred Skills and Experience

• Experience in aerospace, defense, energetic materials, chemical processing, propulsion, or other high-hazard manufacturing environments.
• Experience supporting mix/cast, energetic material processing, propulsion manufacturing, or test operations.
• Experience with structured hazard assessment methods such as PHA, What-If, FMEA, or similar techniques.
• Familiarity with process safety, Management of Change, or equipment commissioning.
• Experience with industrial hygiene, hazardous waste, and environmental compliance.
• Familiarity with ATF, NFPA, or DoD explosives safety requirements.
• OSHA 30, HAZWOPER, ASP, CSP, or similar training or certification.
• Experience working in a startup or rapidly scaling manufacturing 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.