Senior Antenna Design Engineer I

United StatesMelbourne · MelbourneFull-timesenior
EngineeringDesign EngineerAntenna Design Engineer
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Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident,

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EngineeringDesign EngineerAntenna Design Engineer
Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.

At CesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.

We are looking to add a Senior Antenna Design Engineer I to our team. The ideal candidate has experience in designing, simulating, building, and testing high-frequency antennas made in printed circuit board (PCB) processes. If you enjoy working in a startup environment and are passionate about developing leading-edge RF hardware for satellites, spacecraft, and aerospace systems, we would like to hear from you.

As a Cesium hardware team member, you will be responsible for antenna designs from initial concept through requirements definition, topology selection, detailed design, analysis, optimization, manufacturing, testing, qualification, and in-orbit support of Cesium's products.

The successful candidate will also present engineering design review materials to our customers and executive team, as well as participate in proposal-writing efforts. As such, excellent written and verbal communication skills are required.

This role will initially be remote, with a planned transition to in-person work once our Florida office is established.
  • Bachelor of Science (BS) degree or higher in Electrical Engineering or Physics from an accredited university or institution.
  • Minimum of 4 years of industry or university research experience in antenna design, analysis, optimization, fabrication, and test. Minimum of 4 years of experience with a Masters degree. More experienced candidates are also encouraged to apply.
  • Expert-level proficiency in 3D electromagnetic simulation tools such as CST or HFSS.
  • Strong experience with EDA tools such as Altium.
  • Hands-on experience with lab instruments such as vector network analyzers, spectrum analyzers, signal generators, and oscilloscopes.
  • Excellent written and verbal communication skills.
  • Antenna design in frequency bands above 20 GHz.
  • Phased array design and development.
  • Aerospace electronics design, development, and qualification.
  • EMI/EMC design and mitigation techniques.
  • We provide generous benefits and stock option packages to all our employees.
  • Listing Details

    Posted
    February 2, 2026
    First seen
    March 26, 2026
    Last seen
    April 23, 2026

    Posting Health

    Days active
    27
    Repost count
    0
    Trust Level
    31%
    Scored at
    April 23, 2026

    Signal breakdown

    freshnesssource trustcontent trustemployer trust
    Cesiumastro
    Employees
    350
    Founded
    2017
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    CesiumastroSenior Antenna Design Engineer I