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.

** This internship requires working on-site at our Idaho Falls, . We are unable to provide relocation assistance or housing support.**

• 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.