Principal Narrowband Communication Systems Engineer II

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.

Build. Iterate. Fly.

We are building, iterating, and getting to space—fast. Our team thrives on action. We leverage deep experience in the space industry with engineering reimagined for speed and agility. We design, test, and deploy real systems that fly. If you want to own critical communications for a satellite mission, keep reading.

We’re looking for builders, problem-solvers, and system thinkers. As a Principal Narrowband Communication Systems Engineer II, you will own the design, configuration, and operation of the satellite’s space-to-ground TT&C systems. You will define how the satellite communicates with the ground in both nominal and off-nominal conditions, ensuring reliable command, telemetry, and fault recovery.

The ideal candidate will have a strong background in systems engineering, experience in space technology, and the ability to be the technical point of contact for a major spacecraft subsystem. You will coordinate activities across multidisciplinary engineering teams, raise issues at the program level, and drive complex programs to success. We are looking for independent, self-starters who are comfortable identifying problems and using their expertise to pathfind solutions.

JOB DUTIES AND RESPONSIBILITIES:
• Own the RF Link – Model, analyze and maintain the satellite’s link budget, modulation and coding, ensuring reliable communications from space to ground.
• Select & Configure Hardware – Define and implement the TT&C radios, antennas, and modems best suited for the mission.
• Develop Operational Concepts – Define how the radios are used in different mission phases, including contingency operations and emergency recovery.
• Integrate & Test – Work with flight software and ground teams to validate end-to-end TT&C performance, from antenna to command center.
• Solve Hard Problems – Optimize low-SWaP communications, mitigate interference, and ensure robust, fail-safe links.

WHAT A SUCCESSFUL CANDIDATE LOOKS LIKE:
• You’re an RF Systems Expert – You understand how to design, analyze, and operate space-to-ground communication links.
• You Think in Link Budgets – You can balance power, bandwidth, protocols and noise to ensure reliable space-to-ground connectivity.
• You Understand Satellites – You know how comms fit into the broader mission, from flight software integration to ground operations, taking ownership of capability up to subsystem boundaries.
• Independent self-starter—You're happy as part of a high functioning team but comfortable identifying problems and using your expertise to pathfind solutions.
• You Move Fast – You can prototype, test, and iterate quickly, focusing on what’s needed.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS:
• Bachelor’s degree in electrical engineering or a related field.
• A minimum of 11 years of experience with emphasis on satellite communications, RF system engineering, or related fields.
• Expertise in design and operation of TT&C, S-band, and narrowband satellite communications.
• Strong understanding of link budget analysis, modulation schemes, and ground station interfaces.
• Hands-on experience configuring and testing ground station equipment and space-qualified radios and antennas.
• Ability to define and implement communication system CONOPS for nominal and emergency operations.
• Understanding of how communication payloads fit into the broader mission, from flight software integration to ground operations.
• Ability to move fast to prototype, test, and iterate quickly, focusing on what’s needed to get a mission off the ground.

PREFERRED EXPERIENCE :
• Experience with software-defined radios (SDRs), CCSDS protocols, or regulatory compliance (ITU/FCC).

CesiumAstro considers several factors when extending an offer, including but not limited to, the role and associated responsibilities, a candidate’s work experience, education/training, and key skills. Full-time employment offers include company stock options and a generous benefits package including health, dental, vision, HSA, FSA, life, disability and retirement plans.

CesiumAstro is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.

Please note: CesiumAstro does not accept unsolicited resumes from contract agencies or search firms. Any unsolicited resumes submitted to our website or to CesiumAstro team members will be considered property of CesiumAstro, and we will not be obligated to pay any referral fees.