Electrical Engineer Intern - Fall 2026 (Avionics)

Castelion Corporation•Torrance, CA

About The Position

Castelion is seeking motivated and talented Electrical Engineering Interns for Fall 2026. You'll help design, build, and test the electronics and hardware that drive our advanced missile systems. From architecture and schematic design to board bring-up and validation, you'll own real hardware projects alongside experienced hardware, firmware, and systems engineers. You won't be doing throwaway work. Your contributions will directly support rapid prototyping and real-world flight tests.

Requirements

Currently pursuing a BS or MS in Electrical Engineering, Computer Engineering, Mechatronics, or a related field
Strong understanding of analog and digital circuit design principles
Experience with PCB component selection and schematic design
Familiarity with PCB bring-up and debugging
Some exposure to MATLAB, Python, C/C++, or other tools for modeling and analysis
Basics of serial communication protocols (CAN, Ethernet, SPI, I2C, etc.)
U.S. Person status required (due to ITAR regulations)

Nice To Haves

Prior project or internship experience designing and testing PCBAs for aerospace, robotics, automotive, or other high-reliability applications
Familiarity with mixed-signal design, power electronics, or RF systems
Strong interest in working in a startup environment with high-impact projects.

Responsibilities

Take ownership of circuit board design from specification and architecture through schematic, layout collaboration, bring-up, and validation
Design and integrate analog and digital circuits, processors, sensors, and power electronics
Collaborate cross-functionally with PCB layout, firmware, mechanical, systems, and test teams
Rapidly iterate hardware designs as system requirements mature
Document design decisions, calculations, schematics, validation results, and learnings clearly
Support system bring-up, debug, and test campaigns in the lab and on hardware-in-the-loop benches