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Salary
$118k – $142k per year
Location
In office (El Segundo)
Seniority
Middle · 2+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Sep 30, 2026. First seen by Alion on Sep 29, 2026. CesiumAstro scores B on the Alion truth index.

Overview
Company
Impact
Profile match
CesiumAstro is an American company founded in Austin in 2017 that builds active phased array communications payloads for satellites, aircraft and defence platforms. Its systems are software-defined and electronically steered, which lets a moving platform track several links at once without mechanical antennas, and the company manufactures them in house rather than integrating third-party subsystems. It sells mainly to defence customers and satellite operators, has raised venture funding from investors including Airbus Ventures and Lightspeed, and operates facilities in Austin, Colorado and the United Kingdom.

We are looking to add a Communication Systems Engineer Modeling & Simulation II to join our team. In this position, you will assist with the design, development, integration, and testing of communications systems supporting products and platforms. This role applies systems engineering principles to develop communications system solutions, improve system performance, and resolve routine communications systems challenges throughout the product lifecycle.

Working cross-functionally with systems, software, RF, electrical, mechanical, integration and test, quality, and program teams, this role supports communications systems engineering efforts from concept development through integration, verification, and production.

JOB DUTIES AND RESPONSIBILITIES

  • Assist with the design and development of communications system architectures, interfaces, subsystems, and performance models.
  • Perform system modeling, link analysis, performance evaluation, trade studies, simulation, and system integration activities.
  • Review system requirements, interface specifications, architecture documentation, analytical results, and technical documentation supporting system implementation.
  • Leverage and contribute to a digital modelling and simulation ecosystem of tools to model communication system architecture in the support of architetcure trade studies, new business efforts, and requirement development
  • Identify workflow automation opportunities to establish streamlined, repeatable modeling and simulation processes and enable efficient reuse of established modeling and simulation techniques
  • Perform verification, validation, testing, simulation, integration, and troubleshooting activities.
  • Analyze simulation results, system performance data, test results, and engineering observations to identify trends and recommend solutions.
  • Support root cause investigations, engineering changes, system improvements, defect resolution, and corrective actions.
  • Collaborate with systems, software, RF, electrical, mechanical, integration and test, quality, and program teams throughout product development.
  • Prepare technical documentation, interface control documentation, verification reports, engineering reports, and engineering change documentation.
  • Participate in design reviews, technical investigations, customer support activities, system integration, and verification activities.
  • Review communications systems engineering methods, modeling practices, requirements management processes, and development activities to identify improvement opportunities.
  • Apply engineering standards, company procedures, customer requirements, and systems engineering best practices throughout the product lifecycle.
  • Contribute to continuous improvement initiatives that strengthen system performance, requirements quality, modeling accuracy, and engineering effectiveness.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS

  • Bachelor's degree in aerospace engineering, electrical engineering, systems engineering, computer engineering, or a related engineering field with 2-5 years of related experience, or Master's degree with 0-3 years of related experience in communications systems engineering, system architecture, RF systems, systems integration, or a related engineering discipline.
  • Working knowledge of communications systems, systems engineering principles, system architecture, requirements development, and interface management.
  • Experience with systems modeling, link analysis, performance evaluation, simulation tools, and engineering analysis methods.
  • Understanding of digital communications, RF fundamentals, networking concepts, signal processing, interface development, and system integration.
  • Knowledge of systems engineering processes, verification methodologies, engineering documentation, technical standards, and requirements management.
  • Familiarity with modeling and simulation, product development, configuration management, and multidisciplinary engineering collaboration.
  • Microsoft Office Suite including Outlook, Word, Excel, PowerPoint, and Teams.
  • Engineering analysis and modeling tools, e.g. MATLAB, Simulink, STK, Python, or equivalent applications.
  • Engineering documentation, requirements management, and collaboration tools, e.g. DOORS, Jira, Confluence, or equivalent applications.
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