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GNC Engineer 3

Plano, Texas

Job ID SAS20232001-95975
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On the L3Harris team, your job is to secure the world. We don’t work here just for the advanced technology and equipment: We work here because we know what – and who – we’re protecting. From families to the intelligence community, and from our climate to our men and women in uniform – we’re making the world a safer place. Working with the L3Harris's engineering team, you'll join our team of qualified, diverse individuals and work in a fast-paced environment with high expectations, global scope, and a collaborative team setting.

  • Full Time
  • Level: Experienced
  • Location: On Site
  • Glassdoor Reviews and Company Rating

Success Profile

What makes a successful Systems Engineer at L3Harris?
Check out the traits we’re looking for and see if you have the right mix.

  • Analytical
  • Collaborative
  • Leader
  • Problem Solver
  • Strategic
  • Technical


Flexible work schedule, paid overtime, cool technology, no micromanagement, nice campus, fun co-workers

Systems Engineer

L3Harris Work Perks

  • Health

    • Medical with a High Deductible and traditional PPO plan options, as well as, vision and a full array of supplemental health benefits
    • A doctors' service to help with referrals and second opinions for you, your family, and parents

  • Family

    • 4 weeks of paid parental leave for moms and dads
    • Fertility treatment
    • Subsidized backup childcare and eldercare
    • Adoption assistance - $5,000 per adoption/$15,000 per employee
    • Pet insurance

  • Well-Being

    • No cap to your PTO time (for exempt employees)
    • Dress for your day - wear what works for you at work
    • Legal plan for you, your family, and parents
    • Discount platform
    • 9/80 work schedule available for most U.S. employees, effective October 24, 2022.

Job Description

L3Harris is dedicated to recruiting and developing diverse, 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 an agile global aerospace and defense technology innovator, delivering end-to-end solutions that meet customers’ mission-critical needs. The company provides advanced defense and commercial technologies across space, air, land, sea and cyber domains. L3Harris has approximately $18 billion in annual revenue and 47,000 employees, with customers in more than 100 countries.


Job Title: Guidance Navigation & Control Engineer (GNC Engineer 3)

Job Code: SAS20232001-95975.

Job Location: Plano, Texas

Job Description:

Using first-principles thinking, GNC engineers use a foundational understanding of physics combined with multi-disciplinary experience to develop and evaluate system capability to help steer a program’s path forward. GNC Engineers are responsible for simulation and software development, implementation, testing, and analysis to support a variety of vehicle types and configurations.

The Advanced Systems & Technologies (AS&T) division is a part of L3Harris’ Agile Development Group and specializes in developing disruptive, next-generation technologies for advanced Unmanned Air Systems (UAS / UAV), advanced radar systems, next-generation weapon systems, and other RF sensor technologies using small company agility and big company experience.

Essential Functions:

  • Support simulation and software development
    • Develop dynamic vehicle aerodynamic, propulsion, and hardware/sensor models
    • Develop guidance algorithms to provide mission capability
    • Design and tune controllers for vehicle stability and control
    • Integrate a suite of sensor feedback for Navigation and Track State Estimation development
    • Evaluate system performance, capabilities, and sensitivities using a variety of methods
    • Support root-cause failure identification and resolution studies
    • Create design/results presentations for internal and external customers
    • Support growth of GNC Functional Organization through creation of technical/process resources
    • Ability to obtain and maintain any additional clearances as required
    • Ability to lift up to 10 lbs.
    • Up to 10% travel may be required for field testing and/or multi-site support
    • Other duties as required


  • U.S. citizen
  • Active DoD clearance with current 5 year update
  • Bachelors degree in in Aerospace/Mechanical/Electrical Engineering, Robotics, or Mathematics
  • Minimum 4 years experience in related GNC discipline
  • Demonstrated Technical Competency in at least one GNC discipline (multiple desired): Guidance, Navigation, Control Theory, Track State Estimation, High-Fidelity Vehicle Modeling
  • Experience in problem solving and trade /parametric study execution
  • Experience using MATLAB/Simulink and C/C++
  • Experience using Microsoft Office products

Preferred Additional Skills:

  • Masters degree in Aerospace/Mechanical/Electrical Engineering, Robotics, or Mathematics and/or equivalent experience
  • Familiarity with a variety of mission sensor types (RADAR, EO/IR, etc), modes, and stabilization
  • Familiarity with a variety of vehicle sensor (GPS, IMU, ADS, etc) types and modes
  • Familiarity with a variety of tracker types and kalman filtering
  • Background in physics/rigid body dynamics
  • Positive Attitude, Mentoring, Emotional Intelligence, Teaming, Delegation
  • Outstanding work ethic and commitment to organizational success
  • Excellent people skills and collaborating in a multi-disciplinary, diverse, and dynamic team environment.
  • Excellent communication skills (written, verbal, & presentation)

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 résumé for this position, you understand and agree that L3Harris Technologies may share your résumé, 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 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.

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.

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