Principal EMI/EMC Engineer

Skills

About the Role

You will own the entire electromagnetic environmental effects (E3) program from the ground up as the first EMI/EMC engineer at an early-stage startup. You will ensure electronics performance through some of the harshest and most varied electromagnetic environments imaginable, using your deep understanding of electromagnetic effects to set requirements, design solutions, identify EMC risks, and perform tests. You will interface with external agencies for EMI/EMC certification, seek out state-of-the-art solutions to difficult problems, and help define company standards for avionics development. This is a hands-on, high impact role in a fast-paced startup environment where you'll need to stay focused, move fast, self-direct, and learn on the fly.

Requirements

• 5+ years of work experience in EMI/EMC engineering with direct involvement in aerospace systems (launch vehicles, spacecraft, or aircraft)
• Advanced degree in electrical engineering, physics, or related fields
• Previous work experience with MIL-STD-461, MIL-STD-464, NASA-STD-4003 documentation
• Knowledge of in-atmosphere and in-space EMI/EMC including space plasma, charging, grounding, bonding, shielding, low radiated emissions design, lightning, electromagnetic field coupling, Maxwell's equations, boundary conditions, image charge/current, and lumped element modeling
• Knowledge of materials and their electrical properties including paint, anodize, alodine, surface finish, electrical conductivity, volume resistivity, surface resistance
• Demonstrated experience troubleshooting EMI events from system to board level
• Proficiency with EMI/EMC test equipment (spectrum analyzers, EMI receivers, antennas, LISNs, current probes, etc) and familiarity with simulation tools (SPICE, HFSS, CST, etc)
• Strong knowledge of RF principles and RF engineering
• Experience in fast-paced work environment with flight hardware
• Excellent verbal and written communication skills
• Must be available to work primarily on-site in person from Stoke's HQ in Kent, WA
• Rigorous attention to detail
• Ability to lead & follow

Responsibilities

• Establish comprehensive EMI/EMC requirements, specifications, control plans, and design guidelines for the launch vehicle and all subsystems
• Perform analyses for conducted/radiated emissions and susceptibility, bonding/grounding, lightning direct/indirect effects, electrostatic discharge, triboelectric charging, multipaction, and spacecraft charging
• Collaborate closely with avionics, RF, power, propulsion, structures, and software teams to integrate EMI/EMC best practices early in the design cycle
• Develop and execute EMI/EMC test plans and procedures, including pre-compliance screening, formal qualification, and system-level testing
• Lead troubleshooting and root-cause investigations for EMI/EMC problems and verify corrective actions
• Create and maintain all EMI/EMC documentation including requirements, analyses, test reports, verification matrices, and certification packages
• Define, procure, and oversee EMI/EMC test facilities and equipment, and coordinate with external labs when needed
• Ensure full compliance and certification against relevant standards including MIL-STD-461G, MIL-STD-464D, NASA-STD-4003, and NASA-HDBK-4002B

Benefits

• Equity in the form of stock options
• Subsidized medical, dental, and vision insurance
• Company-paid life and disability insurance
• 401(k) plan with employer match
• 4 weeks' Paid Time Off
• 10 paid holidays including an end-of-year closure
• Paid Family/Parental Leave
• On-site gym or monthly wellness stipend
• Dog friendly offices