Senior Structural Analysis Engineer

About Portal

Portal Space Systems is on a mission to expand humanity’s freedom of movement in space. We’re building the spacecraft that makes that mission possible. From our Bothell, WA headquarters, we design vehicles with the maneuverability, resilience, and adaptability needed for the next era of orbital operations. Every system we build is in service of a simple idea: space should be more accessible, responsive, and capable. Joining Portal means stepping into a team that believes in bold engineering, fast iteration, and the power of small groups to change what’s possible. If you want your work to directly shape the future of in-space mobility, join us.

About the Role

The Structural Analysis Engineer is responsible for substantiating spacecraft primary and secondary structures through finite element analysis and first-principles hand calculations. This role owns structural verification activities, including stress, deflection, stability, and margin of safety assessments that support design and qualification decisions. The position works closely with design, manufacturing, and test teams to ensure structural integrity is maintained throughout development.

Primary Responsibilities – Structural Substantiation & Verification

Own the structural finite element model (FEM) for primary and secondary spacecraft structures and maintain configuration control

Perform stress, deflection, stability, and margin of safety analyses using FEM and first-principles hand calculations

Substantiate metallic and composite structures, including strength, stiffness, and buckling assessments

Develop and document structural verification approaches, assumptions, and acceptance rationale

Support design trades and architecture decisions through analytical assessment of load paths and structural efficiency

Partner directly with design engineers to validate and optimize primary and secondary structural designs for strength, stiffness, weight, cost, and manufacturability

Additional Responsibilities – Analysis Automation & Cross-Functional Support

Develop Python-based tools to automate analysis workflows, post-processing, and margin reporting

Collaborate with design, manufacturing, and test teams to resolve structural issues and assess nonconformances

Support structural qualification and acceptance testing, including pre-test predictions and post-test correlation

Contribute to structural documentation, analysis reports, and verification artifacts

Basic Qualifications

2 + years of experience in spacecraft structural analysis, primary structures, or structural substantiation roles

Experience performing stress, deflection, buckling, and margin of safety assessments using FEM and hand calculations

Proficiency developing and maintaining structural finite element models using FEMAP/Nastran or Siemens Simcenter 3D

Experience substantiating metallic and composite spacecraft structures, including load path validation

Experience owning or supporting structural verification efforts through analysis and test

Proficiency with Python and/or MATLAB for analysis automation, data reduction, and reporting

Experience using version control systems such as Git in an engineering analysis environment

BS or MS in Aerospace Engineering, Mechanical Engineering, or a related engineering discipline

Preferred Skills & Experience

Strong ability to perform structural stress analysis and margin of safety calculations for primary and secondary spacecraft structures

Deep understanding of load paths, structural behavior, and failure modes in metallic and composite structures

Ability to build, interrogate, and validate finite element models using first-principles reasoning

Proficiency in developing and applying hand calculations to verify and bound FEM results

Ability to automate analysis post-processing and verification reporting using Python or MATLAB

Clear technical communication skills for documenting assumptions, methods, and structural substantiation rationale

Pay Range: $145,000 - $205,000

Compensation and Benefits:

Your actual level and base salary will be determined on a case-by-case basis and may vary based on the following considerations: job-related knowledge and skills, education, and experience.

At Portal, your base salary is just one part of your total rewards package. You may also be eligible for long-term incentives, in the form of company equity at an exciting time of company growth as well as potential bonuses. You will also receive access to comprehensive medical, vision, and dental coverage (premiums paid by Portal 100%), access to a 401(k)-retirement plan, paid parental leave, you may also accrue 3 weeks of paid vacation and will be eligible for 12 or more paid holidays per year as well as sick time.

ITAR Statement

This position may involve access to technical data and defense-related materials controlled under the International Traffic in Arms Regulations (ITAR). Eligibility to access ITAR-controlled items requires that candidates be U.S. persons , which includes U.S. citizens, lawful permanent residents, and other protected individuals as defined by U.S. law. Employment is contingent upon verification of ITAR eligibility and, where applicable, obtaining any required export authorization or license.

Equal Opportunity Statement

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.