Industrial Hygienist

About the role

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. Castelion is seeking an Industrial Hygienist to support our growing manufacturing and test operations in New Mexico. This individual will serve as a technical resource for industrial hygiene and occupational health as the site progresses through commissioning, startup, and full-scale operations supporting energetic materials, propulsion systems, manufacturing, assembly, and testing. Reporting to the New Mexico Site EHS Manager, the Industrial Hygienist will work closely with Engineering, Manufacturing, Facilities, Energetics Safety, and EHS team members to identify and characterize workplace exposures, establish effective controls, and integrate industrial hygiene considerations into the design and operation of new and evolving processes. This is a hands-on role requiring regular engagement with operations and periodic support of Castelion's development and test activities in Midland, Texas. The position is primarily onsite and requires regular presence in manufacturing, test, and production environments involving hazardous and energetic materials. The role may require the use of personal protective equipment, occasional work outside normal business hours, and periodic travel to Midland, Texas.

Responsibilities

• Develop and execute the site's industrial hygiene program, including exposure assessment strategies, sampling plans, monitoring, documentation, and periodic reassessment.
• Conduct qualitative and quantitative assessments of chemical and physical hazards associated with manufacturing, energetic materials, testing, and supporting operations, including airborne contaminants, noise, and non-ionizing radiation.
• Establish risk-based exposure monitoring strategies, including similar exposure groups, baseline characterization, monitoring frequencies, and reassessment criteria.
• Evaluate occupational exposure risks associated with hazardous and energetic materials, manufacturing processes, testing activities, and emerging technologies.
• Partner with Engineering, Manufacturing, Facilities, and Energetics Safety to identify and implement effective engineering and process controls using the hierarchy of controls.
• Evaluate the effectiveness of ventilation, containment, and other exposure-control systems and provide technical recommendations for improvement.
• Provide industrial hygiene input during facility design, commissioning, new equipment and process reviews, and operational changes to ensure occupational health considerations are incorporated early.
• Serve as a technical resource for respiratory protection, PPE selection, occupational exposure limits, noise and hearing conservation, non-ionizing radiation, and medical surveillance requirements.
• Apply and interpret applicable OSHA requirements and recognized industrial hygiene standards and guidance, including ACGIH, NIOSH, ANSI, and AIHA practices, to establish technically sound exposure assessment and control strategies.
• Analyze and interpret exposure monitoring data, toxicological information, and occupational exposure limits to develop practical recommendations and communicate risk to employees and leadership.
• Develop industrial hygiene procedures, technical guidance, training, and employee communications supporting occupational health programs.
• Support investigations involving potential employee exposures, occupational health concerns, incidents, releases, or abnormal operating conditions.
• Maintain industrial hygiene and employee exposure records in accordance with applicable regulatory and company requirements.
• Periodically support industrial hygiene assessments and program needs at Castelion's Midland, Texas operations.
• Support broader site EHS programs and initiatives where industrial hygiene expertise is required.

Requirements

• Bachelor's degree in Industrial Hygiene