Full-Time

Guidance, Navigation, and Control Software Engineer 1

Updated on 9/4/2026

L3Harris Technologies

L3Harris Technologies

10,001+ employees

Defense technology solutions for national security

No salary listed

No H1B Sponsorship

Richardson, TX, USA

In Person

Up to 10% travel may be required for field testing or multi-site support.

US Top Secret Clearance Required

Bachelor's

Category
Aerospace Engineering (1)
Required Skills
Microsoft Office
Propulsion
MATLAB
Simulink
C/C++

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Requirements
  • Proficiency with MATLAB/Simulink and C/C++.
  • Demonstrated problem-solving skills, including experience performing trade studies and parametric analyses.
  • Strong interpersonal and collaboration skills and the ability to work effectively in a multidisciplinary, diverse, and dynamic team environment.
  • Strong written and verbal communication skills.
  • Proficiency with Microsoft Office applications.
  • Technical competency in at least one guidance, navigation, and control discipline, such as guidance, navigation, control theory, tracking and state estimation, or high-fidelity vehicle modeling.
  • Ability to meet the physical requirement of lifting up to 20 pounds.
  • A bachelor's degree in Aerospace Engineering, Mechanical Engineering, Electrical Engineering, Robotics, Mathematics, or a related technical discipline and a minimum of 4 years of related engineering experience; alternatively, 2 years of related engineering experience with a master's degree, or 8 years of prior related engineering experience in lieu of a degree.
  • Active United States Secret security clearance.
Responsibilities
  • Develop and support simulation environments and software tools for advanced guidance, navigation, and control 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.
  • Travel up to 10% for field testing and/or multi-site support may be required.
Desired Qualifications
  • An 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 mission-sensor types such as RADAR and EO/IR, including their modes and stabilization.
  • Familiarity with vehicle-sensor types such as GPS, IMU, and ADS, including their modes.
  • Familiarity with tracker types and Kalman filtering.
  • Background in physics and rigid body dynamics.
  • Experience mentoring or providing technical guidance to other engineers.
  • 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 engineering environment.
  • Communication skills across written, verbal, and presentation settings.
L3Harris Technologies

L3Harris Technologies

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L3Harris Technologies provides defense and national-security technology solutions across space, air, land, sea, and cyber domains. It develops integrated systems with advanced communications, surveillance, and reconnaissance to support government agencies and defense contractors under long-term contracts. The product combines hardware, software, and services to deliver secure, interoperable, mission-critical capabilities. Its goal is to help clients strengthen operational readiness and national security through reliable, multi-domain technologies and sustained partnerships.

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

  • Q2 2026 revenue reached $5.9 billion, with backlog climbing to a record $42 billion.
  • Management raised 2026 guidance to $23.2 billion-$23.7 billion after 7.3 billion orders.
  • Intuitive Machines will build 18 spacecraft for L3Harris's SDA Tranche 3 missile-tracking mission.

What critics are saying

  • Aug. 17, 2026 CEO ouster exposes governance weakness after misconduct review and abrupt board turnover.
  • U.S. government concentration is dangerous; 74% of year-to-date revenue came from federal customers.
  • Missile-production buildouts need years; any program slip, defect, or cancellation hits backlog conversion hard.

What makes L3Harris Technologies unique

  • L3Harris spans missile propulsion, secure communications, and space payloads across all warfighting domains.
  • Aug. 2026 Roman telescope launch showcases decade-long NASA integration and radiation-hardened optical systems.
  • July 27, 2026 PAC-3 agreement and THAAD expansion lock L3Harris into critical interceptor supply.

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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

14%

1 year growth

14%

2 year growth

14%
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.

Yahoo Finance
Aug 22nd, 2026
L3Harris taps Intuitive Machines to build 18 spacecraft for $1.8B missile defence mission

L3Harris Technologies selected Intuitive Machines on 4 August to build 18 advanced spacecraft platforms for the Space Development Agency's Accelerated Missile Defense Tranche 3 mission. Intuitive Machines will manufacture and deliver the satellite platforms to host L3Harris' payload technology for national security space operations. L3Harris reported Q2 2026 revenue of $5.9 billion, an 8% year-over-year increase, with net income of $600 million. The company raised its full-year 2026 revenue guidance to $23.2 billion–$23.7 billion, backed by a $42.0 billion backlog. Intuitive Machines reported Q2 2026 revenue of $206 million, more than four times its prior-year level. However, the company posted an operating loss of $47 million and burned $84 million in cash during the quarter, leaving $367 million in cash. Its backlog expanded to a record $1.8 billion.

Yahoo Finance
Aug 18th, 2026
L3 Harris CEO ousted amid misconduct allegations, echoing 2012 Lockheed Martin exit

Christopher Kubasik has been ousted as CEO of L3 Harris following allegations of misconduct. According to Semafor, citing sources familiar with the matter, an investigation found he was engaged in an inappropriate relationship with a subordinate. This marks the second time Kubasik has been forced out of a leadership position under similar circumstances. In 2012, he was set to become CEO of Lockheed Martin but resigned after an ethics investigation confirmed he had a close personal relationship with a subordinate employee. L3 Harris, headquartered in Melbourne, Florida, announced Kubasik's departure on 17 August. The company said the misconduct was unrelated to financial reporting, controls, customer relationships or operational performance. Kubasik will retain some vested stock options but won't receive severance payments.

Yahoo Finance
Aug 17th, 2026
L3Harris CEO steps down after conduct review, shares fall 2.7%

L3Harris Technologies announced the immediate departure of CEO Christopher Kubasik following a conduct review, causing shares to fall roughly 2.7% in premarket trading Monday. The board appointed Sam Mehta as president and CEO, whilst Lewis Hay III became independent chairman. The company stated Kubasik's conduct was inconsistent with its Code of Conduct, though unrelated to financial reporting, controls, customer relationships, or operational performance. Following an investigation with independent counsel, the board entered into a separation agreement with Kubasik. Mehta joined L3Harris in 2023 and brings over 25 years of aerospace and defence leadership experience. He previously led segments comprising more than 80% of the company's total revenue. Despite the leadership change, L3Harris reaffirmed its 2026 consolidated revenue and financial guidance.

Associated Press
Aug 10th, 2026
L3Harris completes hot-fire test of stage two rocket motor for Next Generation Interceptor program

L3Harris Technologies has successfully completed a hot-fire test of its stage two advanced large solid rocket motor for the Missile Defense Agency's Next Generation Interceptor programme. The company conducted the test as part of the Lockheed Martin team developing the homeland missile defense system. The test validated the system's design integrity, with the motor completing a full-duration burn in a simulated high-altitude, vacuum environment. Engineers evaluated performance in conditions mimicking Earth's upper atmosphere. L3Harris serves as the primary propulsion and control systems provider for NGI, producing both stage one and stage two rocket motors, plus the Attitude Control System and Divert and Attitude Control System. The company manufactures components across facilities in California, Virginia, Alabama, and Arkansas.