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Ancil Marshall

Ancil Marshall

Senior Guidance Navigation and Controls Engineer

Guidance Navigation and Controls
Aircraft, Spacecraft, Orbital Dynamics
Modeling and Simulation
47 years old
Boston (02108) United States (Massachusetts)
Employed Open to opportunities
Senior Guidance, Navigation and Controls (GNC) Engineer with over fifteen years of experience specializing in aircraft, missiles, launch vehicles, space vehicles and commercial drones. Expert in a wide-range of GNC responsibilities such as the modeling of aerospace vehicles, the design and analysis of feedback control laws, the development of guidance algorithms, the analysis of mission performance via simulations, the support of vehicle integration tests and on-site, in-field flight activities.

Strong project management skills demonstrated by leading various programs and heading up small multi-disciplinary teams for diverse projects. Firmly believes in team development through collaboration, training and mentoring.

Open to new opportunities in a GNC flight controls group where I can leverage my experience to ensure the success of challenging projects.
  • GNC Lead for a Boeing 777X autonomy project. Manages a small team of GNC and Software Engineers to develop an independent autonomy, autoflight and primary controls function to aviate the 777X.
  • Designs SISO and LQR controllers, as well as guidance algorithms for the 777X using Model Based Design (MBD) in Matlab/Simulink. 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. Coaches team members.
  • 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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