Senior Systems Engineer - Software

Modern Technology Solutions, Inc. (MTSI) is seeking a Software & Ground Systems Engineer to support next‑generation space systems. Responsibilities: Software Engineering & Lifecycle Governance Software Acquisition & Governance: Monitor, identify, document, and report technical discrepancies across software acquisition planning, risk analyses, and acquisition strategy panels in compliance with AFI 99-103, AFSPCI 99-103, and SSC-S-001. Technical Audits & Reviews: Conduct technical evaluations during Functional and Physical Configuration Audits (FCA/PCA), Computer Resource Working Groups (CRWGs), specification reviews, and contractor proposal reviews. Software Assurance & Margin Analysis: Perform code, design, and data flow reviews, timing and memory margin analyses, performance predictions, and software capability assessments. Spacecraft, Payload, & Ground Software Oversight Flight Software Subsystem (FSS) Oversight: Monitor spacecraft and payload flight software (FSW)—including Pointing and Control Assembly (PCA) FSW and Signal Processing Assembly (SPA) FSW—for GEO and HEO orbits. Ground Segment Integration: Evaluate ground software subsystems, including Tracking, Telemetry & Control (TT&C), Ground Control, Mission Management and Services, and crypto interface integrations. Obsolescence & Maintenance Analysis: Analyze hardware/software integration, databases, and flight/ground software code bases to resolve obsolescence issues and support onboard payload maintenance. Integration & Test (I&T) Verification: Review test plans, procedures, and simulation analyses to verify software functionality, system interoperability, and operational readiness. What Required Skills You'll Bring: Experience 7+ years of experience architecting, implementing, or integrating ground system components (satellite command & control, TT&C, data processing, communications, or mission planning). 7+ years of hands-on software engineering/development experience using C++, Python, or related technical stacks. 2+ years of leadership experience presenting or evaluating program lifecycle reviews (SRR, SDR, SFR, PDR, CDR, MRR, or TRR). 2+ years of experience developing or evaluating technical software design artifacts, Interface Control Documents (ICDs), and operational integration procedures. Compliance & Standards Working knowledge of systems and software standards such as AFI 99-103, AFSPCI 99-103, or SSC-S-001. Testing & Agile Methods Experience with system-level testing, hardware-in-the-loop debugging, and Agile software development workflows. Education: Bachelor’s degree in a STEM discipline (Computer Science, Computer Engineering, Aerospace Engineering, Software Engineering, etc.). Clearance: Active TS Clearance. What Desired Skills You'll Bring: Full-Stack & Language Diversity: Proficiency in Java, C#, C, JavaScript, React, Node.js, or software automation frameworks. Specialized Software Standards: Knowledge of aviation or space software safety/quality standards (e.g., DO-178C, IEEE 12207). Space Systems Experience: Experience with NG OPIR, SBIRS, or Weather System Systems Engineering Plans (SEPs). Automated Testing & Workflow Optimization: Experience optimizing client workflows through automation tools and automated testing suites. Advanced Education: Master’s degree in Computer Science, Software Engineering, or related field. Clearance: Active Top Secret Clearance and ability to acquire SCI / SAP Access The pay range for this position in California is $165,000/year to $205,000/year; however, base pay offered may vary depending on established government contract wages, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applicants should apply via MTSI's internal or external careers site. #LI-BH1 #mtsi #mtsijobs