Senior RF Systems Engineer

Vast is developing next-generation space stations and space infrastructure using an incremental, hardware-rich, and low-cost approach. Vast is rapidly developing its multi-module Haven Station to ensure a continuous human presence in space for America and its allies, enabling advanced microgravity research and manufacturing, and unlocking a new space economy for government, corporate, and private customers. Haven Demo’s 2025 success made Vast the only operational commercial space station company to fly and operate its own spacecraft. Next, Haven-1 is expected to become the world’s first commercial space station when it launches in 2027, followed by additional Haven modules. Additionally, the company recently announced Vast Satellite, a high-power satellite product line leveraging its space station components and the heritage of Haven Demo.Headquartered in Long Beach, California, and with more than 1,000 employees and over a billion dollars in private capital, Vast has built the facilities required to manufacture and operate America’s next space station. The company plans to develop future habitats and systems for the Moon and Mars, dedicated space stations for government partners, and other crewed systems that will unlock the expanding long-term space economy.Vast is looking for a RF Systems Engineer, reporting to the Director, RF Engineering, to execute the development of the RF Systems for spacecraft including space stations and satellites. As a Senior RF Systems Engineer, you will manage communication system requirements and verification for space stations and satellites. Your responsibilities will include RF system design, link budgets, satellite coverage analysis, and definition of system concepts-of-operation (CONOPs). You will be expected to own one or more RF components and to collaborate with your mechanical, thermal, test, integration, and mission assurance engineering counterparts to guide those components through testing, integration, and operation during the mission.This will be a full-time, exempt position located in our Long Beach location. Responsibilities: Own and manage spacecraft RF system requirements and verification planSpecify link parameters including modulation, error correction coding, symbol rate, and channel filterCalculate link budgets, considering data throughput requirements, link conditions, and ground station characteristicsEstimate the expected data throughput and bit error rate based on your link budgetsMaintain link budgets with consideration to on-vehicle antenna patterns, cable losses, radio specifications, and channel conditions for the expected orbitSupport regulatory license applications by providing required analyses such as power flux density and antenna contoursUse standard tools such as Ansys STK to estimate coverage and link variability during real mission orbit scenariosDocument and review your work output with peers through trade studies and design reviewsOwn one or more RF products from development testing through mission operationBe a center of subject matter expertise over your RF components in the context of the overall RF systemPlan the design, manufacturing, testing, integration, and delivery to the vehicle and coordinate the schedule with interfacing teams and project managementManage relationships with cross-functional teams including mechanical engineers, test engineers, manufacturing engineers, thermal engineers, and avionics engineersManage vendors and clearly communicate requirements, deliverables, and scheduleDefine test plans and procedures for acceptance and qualification testingDefine and document checkout tests to validate proper operation during and after integration at the vehicle levelSupport mission operations as a subject matter expert on the spacecraft RF systemMinimum Qualifications:Bachelor's degree in ECE, EE, Physics, or related STEM disciplineFamiliarity with digital RF communication theory, components, and fundamentals Satellite Link budgetsSatellite link figures of merit including G/T ratioSignal-to-noise figures of merit including C/No, Eb/No, etcError vector magnitude (EVM)Noise figureBit error rateModulation schemesInterferenceIQ modulatorsChannel impairmentsEIRPFree space path loss (FSPL)Doppler shiftFamiliarity with antennas and propagation Antenna gain/directivityAntenna polarizationExperience with RF measurements and concepts Spectrum analyzersNoise bandwidthExperience with RF fundamentals S-parametersExperience in programming Data analysis toolsExperience with product managementVendor managementDesign reviewsRequirements and verificationPreferred Skills & Experience:MS or PhD in ECE, EE, Physics, or related stem disciplineWork experience Startup experienceAerospace experienceDesign for spaceTesting for space environments EMI/EMC testingEnvironmental testingSMC-S-016 test requirements for launch vehiclesRF measurements Spectral maskSpur measurementsExperience with analysis software STKPythonMatlabRF for satellite communications Orbital mechanicsP1dBTransmission line lossSpectral regrowthHarmonic distortionRF passive componentsSatellite communications standards CCSDSDVB-S2DSP for RF communications Receiver synchronizationShannon theoryNyquist sampling theoremForward error correctionAntenna/propagation effectsMultipathAxial ratioCross-polarizationPay Range: California$120,540—$209,520 USDWe calibrate level and compensation to the selected candidate's experience and demonstrated capability. We welcome applicants across a range of experience levels to apply.COMPENSATION AND BENEFITSBase salary will vary depending on job-related knowledge, education, skills, experience, business needs, and market demand. Salary is just one component of our comprehensive compensation package. Full-time employees also receive company equity, as well as access to a full suite of compelling benefits and perks, including: medical, dental, and vision coverage for employees and dependents, generous paid time off; up to 20+ days of vacation for exempt staff and up to 10+ days of vacation for non-exempt staff with the ability to cash-out unused vacation annually, paid parental leave, short and long-term disability insurance, life insurance, access to a 401(k) retirement plan, ClassPass credits, personalized mental healthcare through Spring Health, and other discounts and perks. We also take pride in offering exceptional food perks, with snacks, drip coffee & onsite barista, cold drinks, and dinner meals remaining free of charge, and lunch subsidized as part of Vast’s ongoing commitment to providing high-quality meals for employees.U.S. EXPORT CONTROL COMPLIANCE STATUSThe person hired will have access to information and items subject to U.S. export controls, and therefore, must either be a “U.S. person” as defined by 22 C.F.R. § 120.62 or otherwise eligible for deemed export licensing. This status includes U.S. citizens, U.S. nationals, lawful permanent residents (green card holders), and asylees and refugees with such status granted, not pending.EQUAL OPPORTUNITYVast is an Equal Opportunity Employer; employment with Vast is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.