Principal GNC & Trajectory Engineer Contingent upon prime contractor approval Purpose: Valkyrie Enterprises has need for a Principal GNC & Trajectory Engineer in Huntsville, AL. In this role you will provide technical and advisory assistance to Targets Program Office by aiding in the refinement and implementation of Target trajectories in support of the agencies flight test events to validate the weapon and system sensors. Job Description: Support the Missile Defense Agency (MDA) Directorate