Aerospace Engineer

About Poseidon Aerospace:

Poseidon Aerospace is reimagining how the world moves goods. We build and operate full-size autonomous cargo aircraft - 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 the San Francisco Bay Area with locations in Washington DC, Oregon, and Maine; we're 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 CAD software such as Fusion 360, SolidWorks, CATIA, or NX for geometry creation and surface preparation

Strong understanding of aerodynamics, stability and control, and aircraft performance

Familiarity with mesh design and refinement including fluent meshing

Working knowledge of structural analysis and load validation

Ability to interpret flight test data and create analytical performance models

Understanding of composite design and manufacturing methods for aerodynamic surfaces

Independent, practical engineer comfortable in a hands-on development environment

Nice to Have:

Experience with flight testing, data acquisition, or post-flight data analysis

Experience with X-Plane aircraft design

Background in seaplane design

Experience with wind tunnel or scaled model testing

Programming skills in Python or MATLAB for CFD and performance automation

Basic experience with FEA for assessing load paths or aerodynamic-induced stresses

What you get from us

Competitive salary and meaningful early-stage equity

Relocation support if applicable

Employee Health Benefit Plans

6% Retirement matching

Flexible PTO

Free lunches, snacks, and a stocked fridge at our offices

AI tools and subscriptions