Built airport ground tracking systems for use in FAA control towers.

Used to manage airplanes on the ground for all tower positions.
Clearance Delivery
Ground Controller.
Local Controller

Designed to pass traffic to TRACON in-air controllers.

Designed to make ground safer at airports around the world.

Designed to reduce runway incursions.

Co-Authored many white papers for the FAA on how the system was to work  

Authored many requirements documents for the FAA