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Senior Communications Systems Engineer I

CesiumAstro

Job Location:

Austin, TX - USA

Monthly Salary: Not provided by the employer

Posted: 20 May 2026 (30+ days ago)

Application Deadline: 17 August 2026

Vacancies: 1 Vacancy

Job Summary

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.

AtCesiumAstro 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 Communications Systems Engineer I to our team. If you enjoy working in a startup environment and are passionate about developing Python-based simulations modeling tools and software-enabled analysis for leading-edge phased arrays satellites spacecraft and aerospace systems we would like to hear from you.

The ideal candidate will have a strong background in systems engineering experience with space-based communication systems and hands-on Python development skills for modeling and this position you will help develop and maintain Python simulations and other analysis tools used to model how our communications hardware functions evaluate SATCOM constellation performance support link budgets and system trade studies and inform requirements development concept of operations (CONOPS) verification planning and risk assessment. You will work across multidiscipline engineering teams contribute to technical decision-making and support program execution with clear analysis modeling results and practical engineering judgment.

JOB DUTIES AND RESPONSIBILITIES

Developmaintain andvalidatePython-based simulations and modeling tools to characterize communications hardware RF payloads phased arrays and SATCOM constellation behavior.
Model end-to-end system performance including link budgets coverage and capacity pointing and geometry operational scenarios and hardware/software trade studies.
Evaluate customer and operational needs and help translate them into system requirements technical assumptions interfaces and verification approaches.
Collaborate with RF antenna hardware software cloud/platform manufacturing and program management teams to support system design and technical execution.
Contribute to cloud-hosted Python tooling data processing workflows APIs or simulation infrastructure as needed to support modeling and analysis activities.
Participate in the development of systems engineering processes for requirements management flow down traceability and model-based analysis.
Support risk analysis trade studies and mitigation planning with quantitative analysis and simulation results.
Identify and help resolve technical issues that may impede engineering progress; communicate analysis methods assumptions results and recommendations clearly to internal stakeholders and as needed external customers.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS

Bachelors degree in electrical engineering aerospace engineering computer science or a related field.
A minimum of 4 years of experience with emphasis on communications systems SATCOM RF systems aerospace systems or related modeling and simulation work.
Strong Python development experience including writing maintainable analysis modeling simulation or automation code.
Practical experience with communication systems analysis such as link budgets RF propagation antenna or phased array performance payload modeling or constellation-level trade studies.
Experience working with hardware RF software or product/component developers to understand interfaces assumptions and system-level impacts.
Familiarity with common scientific Python libraries and workflows such as NumPy SciPy pandas plotting/visualization tools testing version control and code review.
Ability to support cloud-based Python development simulation infrastructure data pipelines APIs or backend services when needed.
Excellent written and verbal technical communication skills including the ability to document models assumptions results and recommendations.
Proficiency with or willingness to work in requirements management tools such as DOORS or Jama.
Strong problem-solving skills and analytical abilities with the capability to identify assess and resolve technical challenges in collaboration with multifunctional teams.

CesiumAstro considers several factors when extending an offer including but not limited to the role and associated responsibilities a candidates 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 torace 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.

We may use artificial intelligence (AI) tools to support parts of the hiring process such as reviewing applications analyzing resumes or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed please contact us.

Required Experience:

Senior IC

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