Mechanical Engineer

Poseidon Aerospace; Alameda (CA); On-site; USD 85,000 - 110,000; Full time

Benefits offered by this job

Competitive salary

Relocation support

Health benefit plans

6% retirement matching

Flexible PTO

Free lunches and snacks

AI tools subscriptions

Job summary

Poseidon Aerospace is reimagining how the world moves goods by building autonomous cargo aircraft and operating them for real-world logistics. As a Mechanical Engineer, you will design structural and mechanical systems, performing CAD work, FEA, and collaboration across manufacturing, aerodynamics, and test teams to move designs from concept to flight hardware.

The ideal candidate holds a Mechanical or Aerospace degree, is proficient with CAD tools (Fusion, SolidWorks, CATIA, NX), experienced

Qualifications

• Degree in Mechanical Engineering, Aerospace Engineering, or related field.
• Proficiency with CAD software: Fusion, SolidWorks, CATIA, or NX.
• Strong understanding of structural design, stress analysis, and mechanical systems.
• Experience with FEA tools: ANSYS, Fusion Simulation, Nastran, or similar.
• Ability to apply GD&T and tolerancing to production drawings.
• Familiarity with composite and metallic fabrication methods.
• Understanding of flight mechanics and aircraft dynamics.
• Hands-on with prototypes, test articles, and shop tools.
• Project management capability in a fast-paced startup environment.

Responsibilities

• Design aircraft structures, mechanisms, and tooling using CAD software.
• Perform FEA to validate strength, stiffness, and load paths.
• Create detailed part/assembly drawings for manufacturing and inspection.
• Design linkages, control surface mechanisms, and mounting systems.
• Collaborate with manufacturing to ensure practical, cost-effective designs.
• Support testing and validation of structural systems, including fixtures.
• Maintain CAD libraries, revision control, and configuration management.
• Provide design feedback to improve manufacturability and structural efficiency.

Skills

GD&T

Project management

Flight mechanics

Hands-on engineering

Education

BSc Mechanical/Aerospace Engineering

Tools

Fusion

SolidWorks

CATIA

NX

ANSYS

Fusion Simulation

Nastran

Job description

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.

We encourage candidates without at least a year of full-time, post graduation work experience to apply to our Mechanical Engineer (New Graduate) job posting

As a Mechanical Engineer at Poseidon Aerospace, you will design the structural and mechanical systems that make our composite aircraft functional and manufacturable. You will work across CAD design, mechanism development, and finite element analysis to create reliable, lightweight structures suited for flight and marine environments. This role is both analytical and hands-on, involving close collaboration with manufacturing, aerodynamics, and test teams to bring designs from concept to flight hardware.

Responsibilities:

• Design and develop aircraft structures, mechanisms, and tooling using CAD software
• Perform FEA to validate strength, stiffness, and load paths in composite and metallic components
• Create detailed part/assembly drawings and documentation for manufacturing and inspection
• Design linkages, control surface mechanisms, and mounting systems for aircraft subsystems
• Collaborate with manufacturing engineers to ensure designs are practical, cost-effective, and easy to assemble
• Support testing and validation of structural and mechanical systems, including fixture and rig design
• Maintain CAD libraries, revision control, and configuration management for aircraft assemblies
• Provide design feedback to improve manufacturability, maintainability, and structural efficiency

Ideal Qualifications:

• Degree in Mechanical Engineering, Aerospace Engineering, or a related field
• Proficiency with CAD software such as Fusion,, SolidWorks, CATIA, or NX
• Strong understanding of structural design, stress analysis, and mechanical systems
• Experience with FEA tools such as ANSYS, Fusion Simulation, Nastran, or similar
• Ability to apply GD&T and mechanical tolerancing to production drawings
• Familiarity with composite and metallic fabrication methods
• Understanding of fundamentals of flight mechanics and aircraft dynamics
• Comfortable working hands-on with prototypes, test articles, and shop tools
• Capable of managing projects independently in a fast-paced, startup environment

Nice to Have:

• Experience with bonded composite structures or hybrid assemblies
• Background in actuation systems, linkages, or motion mechanisms
• Knowledge of vibration, fatigue, or modal analysis
• Hands-on experience with machining, additive manufacturing, or assembly tooling
• Familiarity with design for manufacturing (DFM) and design for assembly (DFA)
• Proficiency in MATLAB or Python for analysis and process automation
• Exposure to aerospace certification or flight test environments

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