Integration and Test Engineers

Company: L3Harris Technologies
Location: Greenville
Posted on: January 22, 2026

Job Description:

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris Technologies is the Trusted Disruptor in the defense industry. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Assoc, Mechanical Systems Engineer – Aircraft Systems Job Location: Greenville TX Schedule: 9/80 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.) Qualifications: (refer to Career Framework) To be eligible, applicants must be pursuing a Bachelor’s Degree in Mechanical or Aerospace Engineering or have completed their Bachelor’s degree within the last 12 months, regardless of age. L3Harris Technologies is proud to be an 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. Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information. By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions. L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English or Spanish. For information regarding your Right To Work, please click here for English or Spanish.

Keywords: L3Harris Technologies, Grand Prairie , Integration and Test Engineers, Engineering , Greenville, Texas