SAIC is seeking a Senior ESS Ground Systems Integration Engineer to join our team in El Segundo, CA. Due to security requirements, work is required to be on-site in a secure facility. SAIC is sub-contractor on the Military Satellite Communications (MILSATCOM) Systems Engineering, Integration and Test (MSEIT) contract. The MSEIT effort provides leading edge Systems Engineering & Integration (SE&I) for the Space Force's Space Systems Command. We support the Space Force's acquisition of state-of-the-art Military Satellite Communications systems, providing global secure protected communications for our nation's warfighters. We seek technical individuals who will thrive in a highly collaborative work environment of small teams, using the most modern tools and methodologies to tackle the challenges of integrating complex space and ground communications systems. You will join a Systems Engineering team defining the next generation of space communication systems supporting Space Force Military Satellite Communications. You will support Systems Engineering & Integration activities in a multidisciplinary and collaborative environment. You will interface and collaborate with SE&I team members, contractors, government civilians and members of the USSF to provide acquisition management development and support. Key Responsibilities: - Lead ground systems engineering and integration activities to develop, define, and implement ESS ground architectures, technical approaches, and engineering processes required to integrate satellite communication systems, segments (Ground, Space, Crypto, and Terminals), subsystems, elements, and components; establish, maintain, and control the technical baseline across multiple stakeholders and programs. - Perform analysis of the systems requirements that define the technical baseline and verification of the technical baseline - Apply Digital Engineering methods and modeling strategies (e.g., MBSE, Digital Twins, digital threads, and analytical models) to develop ground architectures, evaluate technical performance, support integration planning, and verify system behavior throughout the lifecycle. - Work with Government and contractor engineering teams to analyze, resolve, and document technical gaps, requirements discrepancies, interface issues, and architecture trades; support major requirements reviews, architecture reviews, design reviews, and other technical forums. - Lead and support Government/Contractor Working Group meetings-by developing briefings, leading discussion, and writing minutes-to address/resolve risks, issues, and action items - Review proposed changes to the technical baseline for impacts to enterprise capabilities and to cross-stakeholder integration concerns - Conduct trade studies, engineering analyses, and technical assessments to develop and evaluate alternative solutions for complex integration and architecture challenges; assess technical, cost, schedule, and performance impacts of recommended solutions. - Facilitate technical reviews of program documentation, including requirements specifications, interface control documents (ICDs), verification artifacts, engineering analyses, and design products; provide technical comments and adjudicate resolutions with stakeholders. - Serve as a subject matter expert to assess technical issues and to prepare briefings to U.S. Space Force program office personnel and other stakeholders; provide courses of actions to support Government decisions - Support management of risks, issues, interdependencies, identifying schedule disconnects and conflicts, developing action plans for resolution, and assisting the Government in executing selected solutions Qualifications Required: - Active Secret clearance required with the ability to obtain a Top Secret clearance - Bachelor's degree in systems engineering, aerospace engineering, electrical engineering, computer engineering, physics, mathematics, or a related technical discipline. - 15+ years experience in systems engineering, integration, or architecture development for complex aerospace, defense, or space systems. - Experience with MILSATCOM, such as AEHF, PTS, EPS, WGS, and FAB-T terminal programs - Experience working with military and DoD civilians - Demonstrated experience integrating Space and Ground segments within national security space, military satellite communications, or related space programs. - Strong interpersonal skills, communication (oral and written), and presentation skills - Proficient in Microsoft Office products (Word, Excel, Powerpoint) - Due to security requirements, work is required to be on-site in a secure facility Desired: - TS/SCI (or eligible) clearance - MS degree in technical field (such as engineering, mathematics, physics, or computer science) or Space Systems - Experience with mission planning, COMSEC/TRANSEC, or key management - Demonstrated strong Systems Engineering and Technical Leadership experience - Knowledge and experience in Agile Development and collaboration tools (Jira/Confluence) - INCOSE CSEP/ESEP certification or equivalent systems engineering credentials