Aerospace Engineer

ABOUT POSEIDON AEROSPACE: Poseidon Aerospace is reimagining how the world moves goods. We build and operate full-size autonomous cargo aircraft; Heron, a seaplane, and Egret, a STOL aircraft; each capable of carrying two tons of payload over a thousand nautical miles. From remote communities to contested logistics operations, our platforms unlock a new cost curve for air freight, making it faster, cheaper, and accessible anywhere it's needed. Headquartered in San Francisco with offices in Washington, DC and Maine, we're a small team building something consequential. As an Aerospace Engineer at Poseidon Aerospace, you will shape the aerodynamic and performance characteristics of our next-generation composite aircraft. Your work will include CFD modeling, aerodynamic optimization, performance analysis, and test correlation. You will help translate flight objectives such as speed, range, and efficiency into manufacturable aircraft. The role combines analytical work with hands-on testing and collaboration across design and manufacturing teams. Responsibilities: - Design and validate aerodynamic surfaces, configurations, and control geometries using CFD analysis and historical data - Support flight dynamics modeling and simulation for stability, control, and performance assessment - Provide input on propulsion integration, cooling airflow, and control surface sizing - Work with mechanical and manufacturing engineers to ensure aerodynamic designs are practical and efficient to produce - Conduct aerodynamic load analyses to ensure the airframe is supported - Create and maintain aerodynamic databases, performance models, and engineering documentation - Correlate CFD and analytical predictions with flight test data - Participate in flight testing and data review to compare measured results with predicted performance - Aid in the development of flight simulation models Ideal Qualifications: - Proficiency with CFD tools such as ANSYS Fluent, Star-CCM+, XFLR5 - Experience using