AST SpaceMobile is building the first and only global cellular broadband network in space to operate directly with standard, unmodified mobile devices based on our extensive IP and patent portfolio and designed for both commercial and government applications. Our engineers and space scientists are on a mission to eliminate the connectivity gaps faced by today’s five billion mobile subscribers and finally bring broadband to the billions who remain unconnected. Position Overview We are seeking a System Integration and Test Engineer to support advanced communications and aerospace-related programs. This role is responsible for integrating complex hardware and software systems and executing comprehensive system-level testing to ensure performance, reliability, and compliance with technical requirements. The ideal candidate is hands-on, detail-oriented, and thrives in highly technical, cross-functional environments. Key Responsibilities: * Plan and execute system integration and testing activities for advanced communications platforms * Perform hands-on integration of hardware and software subsystems, identifying and resolving interface and performance issues * Collaborate with cross-functional engineering teams to define integration requirements and address technical challenges * Conduct system-level testing in controlled lab environments as well as field or over-the-air testing scenarios * Analyze test results and provide clear documentation, reports, and actionable recommendations * Track and communicate integration progress and status updates to stakeholders * Develop and maintain automated test scripts and procedures to improve testing efficiency and coverage * Support system verification, validation, and acceptance testing efforts  Qualifications  Education: * Bachelor’s in electrical or computer engineering with an emphasis in RF/microwave, communications systems, or telecommunications (M.S. a plus, not required) * Coursework in RF/microwave circuit design, antenna theory, digital/analog communications, signal processing (DSP), and electromagnetics Experience: A minimum of 0–3 years of experience in communications or RF systems  Preferred Qualifications: * RF/Communications or Telecommunications experience * Hands-on experience with spectrum analyzers, signal generators, network analyzers, power meters * Experience with arbitrary waveform generators and signal injection techniques * Familiarity with modulation/demodulation schemes (QPSK, etc) and link budget analysis * Working knowledge of 4G LTE and 5G architectures including Core and RAN functions * Exposure to telecom test equipment (Keysight, Anritsu, etc) * Understanding of over-the-air (OTA) test methodologies and RF link characterization * Lab based hardware integration (bench assembly, cabling, harnessing) * Test procedure development, execution, and reporting * Root cause analysis and anomaly resolution/troubleshooting * Eligibility to obtain or maintain a security clearance (if required)  Soft Skills: * Strong interpersonal skills with the ability to collaborate across diverse engineering teams * Proven ability to troubleshoot complex problems and think critically under pressure * Excellent written and verbal communication skills for technical documentation and reporting * Meticulous attention to detail to ensure accuracy in testing and reporting deliverables * Strong organizational and time management skills in fast-paced environments  Technology Stack: * Programming and analysis tools such as Python, MATLAB, or similar * Test and measurement equipment for system validation * Automation tools or scripting frameworks for test execution * Data analysis and reporting tools * General engineering design and collaboration platforms  Physical Requirements * Ability to work in a standard office, lab, or testing environment * Ability to operate a computer and technical equipment for extended periods * May require occasional lifting of light equipment or working in specialized test environments Additional Requirements Due to the nature of this role and applicable federal regulations, U.S. citizenship is required.  This job description may not be inclusive to the duties and responsibilities listed. Additional tasks may be assigned to the employee from time to time or the scope of the job may change as needed by business demands.  AST SpaceMobile is an Equal Opportunity, at will Employer; employment 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.