Senior Systems Engineer - Software

Modern Technology Solutions Inc•El Segundo, CA

2d•$165,000 - $205,000

About The Position

Modern Technology Solutions, Inc. (MTSI) is seeking a Software & Ground Systems Engineer to support next‑generation space systems.

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.
Working knowledge of systems and software standards such as AFI 99-103, AFSPCI 99-103, or SSC-S-001.
Experience with system-level testing, hardware-in-the-loop debugging, and Agile software development workflows.
Bachelor’s degree in a STEM discipline (Computer Science, Computer Engineering, Aerospace Engineering, Software Engineering, etc.).
Active TS Clearance.

Proficiency in Java, C#, C, JavaScript, React, Node.js, or software automation frameworks.
Knowledge of aviation or space software safety/quality standards (e.g., DO-178C, IEEE 12207).
Experience with NG OPIR, SBIRS, or Weather System Systems Engineering Plans (SEPs).
Experience optimizing client workflows through automation tools and automated testing suites.
Master’s degree in Computer Science, Software Engineering, or related field.
Active Top Secret Clearance and ability to acquire SCI / SAP Access

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.
Conduct technical evaluations during Functional and Physical Configuration Audits (FCA/PCA), Computer Resource Working Groups (CRWGs), specification reviews, and contractor proposal reviews.
Perform code, design, and data flow reviews, timing and memory margin analyses, performance predictions, and software capability assessments.
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.
Evaluate ground software subsystems, including Tracking, Telemetry & Control (TT&C), Ground Control, Mission Management and Services, and crypto interface integrations.
Analyze hardware/software integration, databases, and flight/ground software code bases to resolve obsolescence issues and support onboard payload maintenance.
Review test plans, procedures, and simulation analyses to verify software functionality, system interoperability, and operational readiness.