Job Information

L3Harris Mechanical Systems Engineer Sr. Assoc (New Grad - Greenville, TX) in Greenville, Texas


Job Title: Senior Associate, Systems Engineering

Job Code: IMS20212411-73295

Job Location: Greenville TX

Job Description:

As a Mechanical Systems Engineer, the job includes developing new aircraft systems or modifying existing aircraft systems to meet customer requirements. The engineer will use systems engineering tools and processes to support the full lifecycle of a variety of aircraft systems such as: Environmental Control, Auxiliary Heat, Oxygen, Liquid Cooling, Environmental Monitoring, Moisture Control, Smoke Detection, Pitot/Static, Cabin Pressurization, Fuel, Ice protection, Air Cycle, Vapor Cycle, Potable Water, Mechanisms, Power Plants, and Hydraulics.

The engineer performs technical planning, system integration, verification and validation, cost and risk and supportability and effectiveness analyses for total systems. Analyses are performed at all levels of total system product to include: concept, design, fabrication, test, installation, operation, maintenance and disposal. Ensures the logical and systematic conversion of customer or product requirements into total systems solutions that acknowledge technical, schedule and cost constraints. Performs functional analysis, timeline analysis, detail trade studies, requirements allocation and interface definition studies to translate customer requirements into hardware and software specifications.

Essential Functions:

  • Developing aircraft system requirements: Concept of Operations, System Specifications, Component Specifications, and System Schematics

  • Performing system analysis and modeling such as: Thermal/Heat Transfer Analysis, Flow/Pressure Drop Analysis, Component Sizing Analysis (Fan, Pump, Heat Exchanger, Valves), and Control System Architecture & Analysis

  • Performing verification and validation such as: creating test plans, creating test procedures, physically operating the system to perform ground and flight testing, writing certification reports

  • Supporting technical publications by providing source data and reviewing publications such as: system operating manuals, maintenance manuals, instructions for continued airworthiness

  • Supporting periodic travel for Technical Interchange Meetings, Program Reviews, Testing, and Aircraft Field Support

  • Proficient computer skills (Microsoft Office tools: Word, Excel, PowerPoint, Visio)

  • Proficient communication skills (verbal, written, slide presentations)

  • Proficient technical writing skills (specifications, procedures, reports)

  • Performing hands-on testing and troubleshooting of aircraft electrical and mechanical systems; requires climbing and crawling on the aircraft in confined areas to perform job duties

  • Capable of passing flight certification requirements: Flight Physical, Altitude Chamber, Ground Survival Training, Water Survival Training

  • Understanding and supporting the aircraft certification process (Civil: 14CFR Part 25 and 23; Military: MIL-HDBK-516)

  • Interpreting and using aircraft technical documentation such as: system schematics, mechanical drawings, electrical drawings, aircraft technical publications, Standards (MIL, SAE, RTCA, 14CFR, etc.)


  • Requires a Master's degree in Mechanical, Aerospace, or Systems Engineering or similar technical degree

  • Minimum 3.0 GPA

Preferred Additional Skills:

  • Experience with requirement management tools (DOORS, MBSE tools such as Magic Draw-Cameo systems modeler)

  • Experience with system analysis and modeling tools (Macroflow, ANSYS Fluent/CFX, MSC Easy 5, Sinda Fluint, High level Microsoft Excel functions & Macros)

  • Experience with Environmental Qualification (Temp, Alt, Humidity, Icing, Shock, Vibe, etc.)

L3Harris Technologies is proud to be an Affirmative Action/Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.