Guidance, Navigation, and Control (GNC) Engineer

Job Locations US-AL-Huntsville
# of Openings
Clearance Required


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Modern Technology Solutions, Inc. (MTSI), is seeking a Guidance, Navigation and Control Engineer in Huntsville.  At MTSI, our more than 1,200 co-owners recognize the high demand for specialized professionals within our industry and that you have many options to choose.  As an employee owned company where culture matters, we believe that by investing in our people we are investing in our company’s future! 


MTSI’s core capabilities run deep across a multitude of areas to include Systems Engineering & Technical Assistance, Integration, Modeling & Simulation, Test & Evaluation, Acquisitions & Program Support, and Mission Assurance services. Our expertise includes ballistic missile defense, air defense, air vehicle survivability, unmanned aircraft, flight test operations, intelligence support, cyber security, space and homeland defense.


Join MTSI this year in celebrating our 27th consecutive year in business and consecutive growth. Our first core value is that employees come first.  We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in our industry.  All new co-workers start with 20 days PTO plus 10 federal holidays, 6% 401k company match with immediate vesting, semi-annual bonuses, and eligibility to participate in our Employee Stock Ownership Plan (ESOP).  We offer other employee focused benefits, including up to $10k in tuition reimbursement and an optional zero dollar deductible BCBS health insurance plan.


For additional company information, please visit:


MTSI is seeking candidates with experience and/or desire to perform six degree of freedom (6-DOF) simulations of BMD interceptors,  ballistic and non-ballistic  threat missiles and/or tactical missiles.  This position involves the use of Guidance, Navigation, and Control (GN&C) Algorithms and missile physics model development.  Candidates will have the opportunity to work closely with senior and junior level engineers supporting numerous on-going Missile Defense Agency missile programs. 


Required Skills:

The modeling and simulation environment is primarily Windows based using FORTRAN, C/C++ and MATLAB. Experience with Linux & Python is a plus.  Candidates must have strong desire and/or capability to perform potential new missile model development and ability to transverse existing missile models to make model updates,  debug model performance to ensure model accuracy and functionality.  Experience with missile Guidance, Navigation and Control Algorithms design and evaluation is a big plus.  Experience with Physics modeling (i.e. Aerodynamic, Propulsion, Control Actuators, Guidance Sensors, Warheads, etc.) and Tracking Sensors ( Radars, Overhead IR Sensor, Kalman Filter design)  is also desired.  Successful candidates should be able to work independently with as-need assistance from Senior engineers and have good communication skills and ability to construct Briefing packages to convey analysis results.  Ability to write MATLAB Scripts (M-Code) to perform 6-DOF Pre & Post processing of simulation data is desired.  Position will be in Government Customer facility with varying levels of customer interaction based on candidate capability and/or desire. 



  • Bachelors degree in Engineering or related technical field required.


  • Must have a minimum of 0-2 years relevant experience


  • The ability to obtain and maintain a Secret clearance required; Existing active clearance is a plus.

Please Note:  U.S. Citizenship is required for most MTSI positions.


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