Senior Propulsion Test Engineer – Spectre Engine

Firefly Aerospace, Inc. in Briggs, TX is seeking an experienced Propulsion Test Engineer to lead hands‑on hotfire testing of the Spectre engine and related systems.

You will own test operations, develop procedures, and coordinate data acquisition to ensure successful lunar and orbital propulsion campaigns. The role requires deep expertise in liquid propulsion, strong data analysis, and leadership to mentor junior team members.