Senior Mechanical Design Engineer (RF Systems & Radomes)

STEM Boomerang•Rio Rancho, NM

About The Position

We are seeking a Senior Mechanical Design Engineer to design and deliver RF-critical structures and packaging for Castelion's long-range hypersonic strike vehicles. This role is focused on radome development and RF subsystem integration, ensuring structural integrity and thermal survivability while preserving RF performance. You will work hands-on with multidisciplinary engineering teams to design, analyze, build, and validate radomes and RF packaging solutions in a fast-paced, hardware-driven environment.

Requirements

Bachelor's, Master's, or PhD in Mechanical Engineering or related field
5+ years of experience in mechanical design for aerospace or high-performance systems
Experience designing radomes, RF-transparent structures, or packaging for RF/antenna systems
Familiarity with RF performance considerations such as dielectric properties, insertion loss, and boresight error
Strong background in structural and thermal analysis for extreme environments
Proficiency in CAD and analysis tools (e.g., NX, SolidWorks, ANSYS, or equivalent)
Experience with tolerance stack-up, alignment, and precision assembly design
Familiarity with materials used in RF applications (e.g., ceramics, composites, low-loss dielectrics) and high-temperature environments
Experience with hardware build, test, and troubleshooting in a lab or flight hardware environment
Strong problem-solving mindset, thriving in a fast-paced, hardware-rich, high flight cadence environment

Responsibilities

Design and deliver RF-critical structures and packaging for long-range hypersonic strike vehicles.
Focus on radome development and RF subsystem integration.
Ensure structural integrity and thermal survivability while preserving RF performance.
Work hands-on with multidisciplinary engineering teams to design, analyze, build, and validate radomes and RF packaging solutions.
Operate in a fast-paced, hardware-driven environment.

Benefits

Meaningful equity for all full-time employees
Four (4) weeks of paid time off
Ten (10) company paid holidays
Medical plans at 100% employee covered and 80% of dependent coverage
Dental & Vision: 90% employees and 80% for dependents
FSA/HSA options
401k plan
Paid Parental Leave: Up to 10 weeks for birthing parents, up to 4 weeks for non-birthing parents (additional for CA employees)
Frequently catered lunches and team meals
Company-covered meals when extra time or effort is required
Fully stocked kitchen with unlimited snacks and drinks
$100 monthly fitness stipend
Onsite electric vehicle charging