Principal EMI/EMC Engineer

Responsibilities

• Establish comprehensive EMI/EMC requirements, specifications, control plans, and design guidelines for the launch vehicle and all subsystems, flowing down from platform-level needs to hardware.
• Perform analyses for conducted/radiated emissions & susceptibility, bonding/grounding, lightning direct/indirect effects, electrostatic discharge (ESD), triboelectric charging, multipaction, and spacecraft charging
• Collaborate closely with avionics, RF, power, propulsion, structures, and software teams to integrate EMI/EMC best practices and mitigations 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, implementing corrective actions and verifying effectiveness.
• Create and maintain all EMI/EMC documentation (requirements, analyses, test reports, verification matrices, and certification packages) to support internal reviews and external approvals.
• Define, procure, and/or oversee EMI/EMC test facilities and equipment; coordinate with external labs when needed.
• Ensure full compliance and certification against relevant standards, including MIL-STD-461G, MIL-STD-464D, NASA-STD-4003 (Electrical Bonding), NASA-HDBK-4002B (Spacecraft Charging), and applicable range safety / launch vehicle requirements.

Qualifications

• 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 effects of space plasma, charging, grounding, bonding, shielding, design for low radiated emissions, 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

Benefits

• Equity – We know that our employees are the reason we succeed. To give everyone a stake in our future, we are pleased to offer equity in the form of stock options to all regular, full-time employees
• Comprehensive benefits program including subsidized medical, dental, and vision insurance 
• Company-paid life and disability insurance 
• 401(k) plan with employer match 
• 4 weeks’ Paid Time Off 
• Holidays – 10 days (including an end-of-year closure) 
• Paid Family/Parental Leave 
• On-site gym or monthly wellness stipend (depending on location) 
• Dog friendly offices! 

Compensation 

Target Level:

• Level 3 Range: $129,150-$193,620
• Level 4 Range: $151,305-$252,105
• Level 5 Range: $176,505-$327,810

Our job posts are intentionally written to attract a wide variety of experience levels, and we make decisions about the right fit on a per-candidate basis. 

Your actual level and base salary will be decided based on your specific experience and skill level.

ITAR Requirements

To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR), you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.

Equal Opportunity 

The Company is an Equal Opportunity Employer, including with respect to disability and veteran status. It is committed to compliance with all equal opportunity laws, including the Immigration and Nationality Act (INA) and Title VII.  It does not discriminate on the basis of nationality, race, citizenship, immigration status, or any other protected class when it comes to employment practices, including hiring.