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L3Harris Technologies

Global defense contractor delivering aerospace tech

GNC Engineer Specialist

Full-Time
No salary listed
Mid
Bachelor's, Master's
Richardson, TX, USA
In PersonUp to 10% travel may be required for field testing or multi-site support.
Aerospace EngineeringFlight Dynamics & GNC

About the job

Requirements
  • Proficiency with MATLAB/Simulink and C/C++.
  • Experience performing trade studies and parametric analyses.
  • Strong interpersonal and collaboration skills, with the ability to work effectively in a multidisciplinary, diverse, and dynamic team environment.
  • Strong written and verbal communication skills.
  • Proficiency with Microsoft Office applications.
  • Demonstrated technical competency in at least one GNC discipline, such as guidance, navigation, control theory, tracking and state estimation, or high-fidelity vehicle modeling.
  • Ability to lift up to 20 pounds.
  • Bachelor’s degree in Aerospace Engineering, Mechanical Engineering, Electrical Engineering, Robotics, Mathematics, or a related technical discipline and at least 4 years of related engineering experience; alternatively, 2 years of related engineering experience with a master’s degree. In lieu of a degree, at least 8 years of prior related engineering experience.
  • Active U.S. Secret security clearance.
Responsibilities
  • Develop and support simulation environments and software tools for advanced GNC applications.
  • Create dynamic models of vehicle aerodynamics, propulsion, hardware, actuators, and sensor systems.
  • Design and develop guidance algorithms to deliver mission capability across a range of operating conditions.
  • Design, implement, and tune controllers to meet vehicle stability, control, and performance requirements.
  • Integrate multi-sensor feedback to support navigation, tracking, and state estimation solutions.
  • Assess system performance, capability, robustness, and sensitivity through analysis, simulation, and test.
  • Perform root-cause analysis of anomalies and support corrective action development.
  • Prepare and communicate design, analysis, and test results to internal and external stakeholders.
  • Support continuous improvement of the GNC organization through development of technical standards, processes, tools, and reusable resources.
  • Support technical growth across the team through mentorship, collaboration, peer reviews, and knowledge sharing.
Desired Qualifications
  • Advanced degree in Aerospace Engineering, Mechanical Engineering, Electrical Engineering, Robotics, Mathematics, or a related technical discipline.
  • Demonstrated technical competency in multiple GNC disciplines.
  • Familiarity with integration and use of various mission-sensor types, including RADAR and EO/IR, modes, and stabilization.
  • Familiarity with various vehicle-sensor types, including GPS, IMU, and ADS, and their modes.
  • Familiarity with various tracker types and Kalman filtering.
  • Background in physics and rigid body dynamics.
  • Experience mentoring or providing technical guidance to other engineers.
  • Strong team leadership, collaboration, and delegation skills.
  • Adaptability, sound judgment, and emotional intelligence in a fast-paced engineering environment.
  • Experience leading and collaborating in a multidisciplinary, diverse, and dynamic team environment.
  • Written, verbal, and presentation communication skills.

About the company

L3Harris Technologies provides aerospace, defense, and space systems for governments and commercial customers, including sensors, communications, propulsion, and space assets. Its products combine hardware and software into integrated systems used for missions, from tactical radios and night vision to satellite payloads and missile defense. The company blends two legacies—Harris and L3—plus an acquisition strategy to deliver quick, field-ready capabilities, with a focus on space, missiles, and resilient satellite communications. Its goal is to deliver mission-ready defense and intelligence technology at scale for national security and related customers.

Company Size

10,001+

Company Stage

IPO

Headquarters

Melbourne, Florida

Founded

1895

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Simplify Jobs

Simplify's Take

What believers are saying

  • July 2026 backlog hit $42 billion after $7.3 billion orders and raised guidance.
  • June 2026 Camden groundbreaking expands PAC-3 capacity as missile inventories stay depleted.
  • August 2026 Intuitive Machines contract deepens L3Harris's SDA Tranche 3 missile-defense platform.

What critics are saying

  • Christopher Kubasik's August 2026 ouster exposed governance fragility and succession disruption.
  • Aerojet Rocketdyne integration and Camden expansions must execute flawlessly before 2030 demand spikes.
  • Lockheed and Pentagon pricing pressure can compress margins if delivery slips or defects emerge.

What makes L3Harris Technologies unique

  • PAC-3 and THAAD propulsion make L3Harris irreplaceable in U.S. missile defense.
  • Space & Mission Systems plus Missile Solutions give Sam Mehta 80% revenue control.
  • Roman telescope optics and NGI motors show unmatched breadth across space and interceptors.

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Benefits

  • Health Insurance
  • Disability Insurance
  • 401(k) Retirement Plan
  • 401(k) Company Match
  • Paid Vacation
  • Paid Holidays
  • Mental Health Support
  • Relocation Assistance

Growth & Insights and Company News

Headcount

6 month growth

15%

1 year growth

15%

2 year growth

15%
Yahoo Finance
Oct 21st, 2026
L3Harris wins $876M Navy contract for next generation jammer prototypes

L3Harris Technologies has won an $876 million contract modification from the US Navy for its Next Generation Jammer Low Band (NGJ-LB) program. The company will build prototype hardware, assemble specialised manufacturing equipment, and support flight testing. The award is undefinitized, meaning work starts before final price and delivery terms are agreed. The government typically uses such awards when it needs a project done quickly. The programme will replace ageing equipment that disrupts low-frequency radar and communications used against US combat aircraft. Chris Aebli, president of communications and spectrum dominance at L3Harris, said the company is "moving fast to deliver a system that equips aviators to counter those threats from safer, extended distances." The deal is small next to L3Harris's nearly $22 billion in revenue last year.

PR Newswire
Oct 15th, 2026
HGT Law investigates L3Harris after CEO Kubasik exit sent shares down 4.61% to $278.38

HGT Law is investigating L3Harris Technologies (NYSE: LHX) for possible securities law violations and breaches of fiduciary duty by its officers and directors. On August 17, 2026, L3Harris said Christopher Kubasik had stepped down as chairman and chief executive officer, citing conduct that breached its Code of Conduct. The stock fell $13.44, or 4.61%, to close at $278.38. The Wall Street Journal reported on August 19, 2026 that multiple women had raised concerns about Kubasik years earlier, including a formal harassment complaint around 2023. In 2012, Lockheed Martin asked him to resign as president over a relationship with a subordinate. The firm is examining whether L3Harris made misleading statements or withheld material information, and whether its board failed in overseeing executive conduct and approving Kubasik's separation terms.

Yahoo Finance
Sep 19th, 2026
L3Harris stock drops 35% despite breakthrough $22K anti-drone system beating $50K Shaheds

L3Harris stock has fallen 16% over the past month following the firing of CEO Christopher Kubasik over conduct issues, despite the company's progress in drone defence technology. The defence contractor's VAMPIRE launcher system, firing BAE Systems' APKWS rockets costing $22,000 each, has successfully shot down Russian Shahed drones worth $50,000, reversing the cost dynamics of drone warfare. The stock now trades below 16 times forward free cash flow, having underperformed defence peers by over 20 percentage points. Sam Mehta stepped in as CEO following Kubasik's departure. L3Harris also supplies solid rocket motors for advanced interceptor missiles including the Patriot system. The company's shares are down 35% from their all-time high set earlier this year.

Yahoo Finance
Sep 11th, 2026
L3Harris lands $4.7B Patriot missile deal to boost US interceptor production to 2,000 units by 2030

L3Harris Technologies has secured a seven-year, $4.7 billion contract with Lockheed Martin to manufacture Patriot missile defence components. The Melbourne, Florida-based defence contractor will produce advanced two-pulse solid rocket motor propulsion systems for the PAC-3 Missile Segment Enhancement interceptor, designed to neutralise aircraft, cruise missiles and ballistic threats. This marks L3Harris's largest PAC-3 propulsion contract. The company operates a facility in Northampton, Massachusetts, through its KEO division, which produces naval technology including US periscope systems and radar systems for surface ships and submarines. To meet production demands, L3Harris broke ground on two new facilities in Camden, Arkansas, in June. The expansion supports the US Department of Defense's goal to increase annual interceptor production from approximately 600 units to 2,000 units by 2030.

Business Wire
Aug 30th, 2026
L3Harris tech powers NASA's Roman Space Telescope to map universe 1,000 times faster than Hubble

L3Harris Technologies has provided key components for NASA's Nancy Grace Roman Space Telescope, which recently launched successfully. The company supplied the 2.4-metre Optical Telescope Assembly and radiation-hardened electronics for the observatory, which will operate approximately 1 million miles from Earth. The telescope is designed to survey the cosmos 1,000 times faster than the Hubble Space Telescope. Once operational, it will conduct three primary surveys, including scanning roughly 12% of the entire sky in under 18 months to measure the universe's expansion rate and study supernova explosions from up to 8 billion years ago. The project represents more than a decade of collaboration between L3Harris and NASA's Goddard Space Flight Center. L3Harris has previously contributed technology to missions including the James Webb Space Telescope and Mars rovers.