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Greenfield Engineering, a Saalex Company  is seeking  Data Integrity Engineer (Avionics Software & Data Analysis)  in  Patuxent River, MD.  The Data Integrity Engineer supports the analysis of avionics software and data systems associated with navigation and airspace integration capabilities. The incumbent independently performs technical analysis of system behavior, data integrity, and software performance while supporting certification and engineering activities across Navy, Marine Corps, Coast Guard, and Foreign Military Sales (FMS) aviation platforms. The role contributes to engineering assessments, technical documentation, and verification activities supporting Performance Based Navigation (PBN) and CNS/ATM capabilities , working within Integrated Product Teams (IPTs) under general guidance from senior engineers. Position Type:  Full-Time Salary:  $100k-$135k annually (depending on experience) Work Location: Full-time onsite with some telework (see onsite requirements below) **On-site Requirements: This position is full-time onsite at Patuxent River, MD and may be eligible for reoccurring telework, but will require an onsite work greater than or equal to 85% of the work week” Essential Functions: Software and Data Analysis Analyze avionics software systems with emphasis on: Data integrity and correctness Logical flow and algorithm behavior Data structures and data handling processes Evaluate system outputs, test data, and engineering artifacts to identify: Discrepancies and anomalies Data inconsistencies and processing errors Apply standard methodologies to assess software and data performance Engineering Support to Certification Activities Support certification and compliance efforts for systems pursuing RNAV, RNP, and CNS/ATM approvals by: Reviewing requirements and design documentation Supporting development of compliance matrices Analyzing verification and validation (V&V) results Assisting in test planning and execution Contribute to engineering and certification assessments with limited oversight Technical Documentation Develop technical documentation, including: Engineering assessments and analysis summaries Test plans, procedures, and reports Certification and compliance artifacts Ensure documentation is: Technically accurate Traceable to requirements Suitable for government review Systems Engineering Support Participate in systems engineering activities across the lifecycle, including: Requirements review and decomposition Design evaluation and interface analysis Integration and verification support Identify risks related to software behavior and data handling Support resolution of technical issues through analysis and coordination Team and IPT Support Work within Integrated Product Teams (IPTs) supporting multi-platform engineering efforts Coordinate with: Senior engineers and technical leads Government program offices and stakeholders Software developers and integration/test teams Provide guidance to junior engineers on task-level execution when appropriate Other duties as assigned or required Requirements Required: Proficiency in software engineering fundamentals (data structures, logical design) Experience with at least one high-level programming language (e.g., Python, Java, C++) Ability to analyze technical problems and interpret data outputs independently Strong technical writing and communication skills Working knowledge of systems engineering processes and lifecycle concepts Basic understanding of avionics systems or aerospace principles Experience in software development, data analysis, or systems engineering Ability to function effectively in a team-based engineering environment Desired: Experience analyzing software behavior and system-level data flows Familiarity with: Data and control coupling conce