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Ancil Marshall

Ancil Marshall

Guidance Navigation and Controls (GNC) Group Manager

Guidance Navigation and Controls
Aircraft, Spacecraft, Orbital Dynamics
Modeling and Simulation
50 years old
Boston (02108) United States (Massachusetts)
Entrepreneur Open to opportunities
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As a former Guidance, Navigation and Controls (GNC) Group Manager, I led a talented and dynamic team of engineers to deliver innovative aircrafts. I am currently on sabbatical in Europe and the UK, where I am exploring new opportunities in Global Leadership, Management, Finance, and Sustainability.

Possesses over twenty years of Aerospace Engineering, Software and Management experience specializing in aircraft, missiles, launch vehicles, space vehicles, commercial drones and autonomy. Expert in a wide-range of GNC responsibilities such modeling, design and analysis, simulation, integration and flight test. Strong project and people management skills demonstrated by leading various multi-disciplinary teams on diverse projects.

Registered Remote Pilot (Drones) in USA, UK, France, Switzerland. Pilots consumer video and FPV drones.
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Experiences
  • GNC Group Manager leading a group of 20 engineers on novel, autonomous aircrafts. Drove strategy and technical roadmaps, team assignments, training and career development. Led initiative, with a small team, to build a quadcopter experimental test platform.
  • GNC Lead for a Boeing 777X autonomy project. Manages a small team of GNC and Software Engineers to develop autonomous flight controls to aviate the 777X.
  • Designs SISO and LQR controllers, as well as guidance algorithms for the 777X using Model Based Design. Applies DO178C and DO331 standards. Auto-generates and implements code into 777X nonlinear desktop and cab simulator.
  • Performs 777X GNC controller architecture designs using Model Based System Engineering (MBSE) techniques to meet operational and safety requirements.
  • Leads customer interactions on the 777X project (e.g., demos, on-site meetings). Manages project milestones, schedule and agile sprints.
  • Lead GNC Engineer for Centaur - an autonomous, optionally-piloted, twin-engine airplane for ISR operations.
  • On Centaur, works with multi-disciplinary team to plan flight tests, post-process flight data and resolve flight anomalies.
  • Works with Centaur Chief Engineer to define requirements and statement of work for the vendor-supplied GNC controllers and guidance algorithms.
  • Lead GNC Engineer for an Urban Air Mobility eVTOL project. Lead team of two GNC engineers during preliminary studies, derived nonlinear hover equations, designed LQR controller and performed rotor failure study.
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  • Researcher and developer of guidance algorithms for Parrot's Drones.
  • Implemented novel guidance algorithms on the Anafi drone.
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  • Software Lead of the iOS mobile application for the Neuronaute - a wearable connected medical device to detect epilepsy. Deputy lead of the mobile group of eight developers.
  • Implemented new functions using existing application architecture and libraries (BLE, TCP/IP, database, GUIs).
  • Improved stability of TCP/IP connection and debugged race-condition. Developed real time graphics library. Reduced CPU usage by 50%.
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  • GNC Engineer on GQM-163A missile. Managed linear analysis tools, conducted nonlinear 6DOF simulations in C++, performed vehicle integration tests, investigated flight anomalies and recommended software fixes.
  • Lead GNC Engineer for High Diver variant of GQM-163A. Performed GNC design from the initial concept to the eventual launch.
  • Lead GNC Engineer on FFMS variant of GQM-163A and traveled to Ile du Levant, France with multi-disciplinary team to perform launch operations.
  • Parameterized GQM's time-scheduled flight gains to a Mach and mass-based adaptive algorithm.
  • Developed various guidance algorithms for the High Diver variant of GQM to improve its performance and robustness.
  • Created Simulink model of the High Diver gas generator, which successfully matched motor tests.
  • Worked with aerodynamics group to simplify a 5D High Diver model into a 2D model in order to embed the reduced model in flight software.
  • Performed independent reviews of the Minotaur I, Pegasus and Antares space launch vehicles, the Orbital Boost Vehicle, and the Patriot Target Vehicle.
  • Lead GNC Engineer for the Zombie Pathfinder program, a single-stage and a two-stage ballistic missile for NASA's Sounding Rocket Program. Performed initial design trade studies, improved 6DOF nonlinear simulations.
  • Mentored other engineers in GNC and C/C++ 6DOF simulation. Taught GNC course to a group of forty engineers.
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Education

Robust and Adaptive Control

Boeing Training

April 2020 to June 2020
Robust and Adaptive MIMO control course featuring Optimal Output Feedback Control with Loop Transfer Recovery.

Robust Control Theory

Safran Training

October 2018
5 day course on classical feedback control, modern robust control including small gain theorem, H-infinity, loop-shaping and mu-analysis.

Master's of Aeropace Engineering

Georgia Institute of Technology, Atlanta GA

2000 to 2002
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Bachelor's of Aerospace Engineering

Georgia Institute of Technology

1997 to 2000
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Skills

Aerospace Engineering

  • Classical, Robust, Nonlinear Control Theory
    Advanced
  • Aircraft, Missile and Spacecraft Dynamics
    Advanced
  • Guidance Algorithms Design and Analysis
    Advanced
  • Navigation, Kalman Filtering, and Sensor Fusion
    Good

Spoken Languages

  • English (native speaker)
    Expert
  • French (professional working proficiency)
    Level C1, Cours de Civilisation Française de la Sorbonne, niveau supérieur
    Advanced
Interests

Literature

  • History, Politics, Economics, Finance, Public Policy, Sustainability, Management, Leadership

Drone Videography

  • FPV, Video Drones. Post-production in Final Cut Pro
  • FAA Certified Remote Pilot (USA),
  • Operational Remote Pilot (UK, Switzerland, France)

Travel

  • Recently visited: Iceland, France, England, Scotland, Albania, Netherlands, Switzerland

Sports

  • Kizomba Dancing, Travel, Fitness