Engineering Intern Fall 2026

Benefits:

• Company parties
• Flexible schedule

At Advanced Ceramic Fibers, LLC (ACF), we are an award-winning advanced materials company creating revolutionary high-performance ceramic fibers and composites for extreme environments. Through our patented Direct Conversion Process™ (DCP), we transform regular carbon fiber into Fi-Bar™, a metal carbide/carbon core fiber material with capabilities beyond anything currently available. Our innovations support critical applications in space, defense, energy, consumer electronics, and beyond.

This is a fantastic opportunity for a motivated Engineering student to gain meaningful, hands-on experience in a real-world advanced materials manufacturing environment. As an Engineering Intern at ACF, you will work directly with our engineering and materials science team on cutting-edge ceramic and metal matrix composite technologies. You’ll contribute to process development, materials characterization, data analysis, and continuous improvement projects while learning industry-leading practices in a small, fast-paced, and innovative company.

Ideal for students seeking practical experience that complements their academic studies and builds a strong foundation for a career in materials science, mechanical engineering, or manufacturing.

• Support the development and optimization of new materials, processes, and equipment for advanced ceramic fibers and composites
• Assist engineers with process improvements, experimental trials, and implementation of best practices
• Perform materials characterization using SEM, Instron, and other analytical instruments; document results and maintain material property databases
• Follow and help refine ASTM/ISO-compliant testing procedures
• Collect, analyze, and interpret production and experimental data to support process optimization
• Contribute to equipment maintenance, setup, and basic troubleshooting
• Collaborate with engineers and technicians in a dynamic, team-oriented environment
• Support documentation, reporting, and data visualization efforts

• Current undergraduate student (Junior or Senior preferred) pursuing a degree in Mechanical Engineering, Materials Science, Chemical Engineering, Electrical Engineering, Mechatronics, or a closely related field
• Strong attention to detail, critical thinking, and problem-solving skills
• High degree of honesty and personal integrity, essential for handling technical data and operating in a regulated environment
• Ability to work both independently and as part of a small team
• Basic mechanical or laboratory experience is preferred; familiarity with CAD (Solid Works), data analysis tools (Python, MATLAB, Excel), or 3D printing is a plus
• Must be located in or able to commute to Idaho Falls, Idaho

Must be a U.S. person (naturalized citizen or qualifying under ITAR/EAR definitions) and eligible to participate in federally funded programs involving Controlled Unclassified Information (CUI)

Successful completion of background check and drug testing required prior to employment

ACF is an Equal Opportunity Employer – M/F/D/V

Idaho Falls offers an outstanding quality of life for outdoor enthusiasts — located just 1.5 hours from Yellowstone National Park, Sun Valley, and Jackson Hole, and 3 hours from Salt Lake City. World-class skiing, hiking, fishing, boating, and access to vast wilderness areas are all right in your backyard.