Senior Mechanical Design Engineer

ALTEN Technology USA; Seattle (WA); On-site; USD 135,000 - 165,000; Full time

Job summary

ALTEN Technology USA is seeking a Senior Design Engineer to lead the design and development of mechanical systems for aerospace/defense applications. You will drive from concept through production readiness, applying strong mechanical design skills and GD&T standards.

You will collaborate with cross‑functional teams across engineering disciplines, provide technical leadership, and support prototype builds, testing, and qualification. The role emphasizes mentorship and rigorous design practices.

Qualifications

• Bachelor’s degree in Mechanical or Aerospace Engineering.
• 6+ years designing aerospace/defense products and systems.
• Experience from testing through qualification to implementation.
• Strong mechanical design with drawing standards and best practices.
• Proficiency in SolidWorks and GD&T.
• Experience using CAD/CAE tools for analyses.
• Understanding of mechanics, materials, stress, and fundamentals.

Responsibilities

• Lead design and development of mechanical systems from concept to production readiness.
• Create innovative solutions meeting customer requirements and constraints.
• Perform calculations, trade studies, and tolerance analyses to support decisions.
• Support multiple programs, maintaining quality, schedule, and objectives.
• Review and validate analyses and design outputs for accuracy and compliance.
• Generate complete design packages including BOMs and drawings.
• Collaborate with manufacturing, quality, systems, and test teams to transition designs to production.
• Provide technical support for prototypes, hardware integration, testing, and qualification.
• Mentor junior engineers and promote engineering best practices.
• Apply engineering judgment to solve high‑level aerospace/defense challenges.

Skills

SolidWorks

GD&T

CAD/CAE

Mechanical design

Technical drawings

Education

Bachelor’s degree in Mechanical or Aerospace Engineering

Tools

SolidWorks

CAD/CAE tools

Job description

We’re ALTEN Technology USA, an engineering company helping clients bring groundbreaking ideas to life—from advancing space exploration and life‑saving medical devices to building autonomous electric vehicles. With 3,000+ experts across North America, we partner with leading companies in aerospace, medical devices, robotics, automotive, commercial vehicles, EVs, rail, and more.

As part of the global ALTEN Group—57,000+ engineers in 30 countries—we deliver across the entire product development cycle, from consulting to full project outsourcing.

When you join ALTEN Technology USA, you’ll collaborate on some of the world’s toughest engineering challenges, supported by mentorship, career growth opportunities, and comprehensive benefits. We take pride in fostering a culture where employees feel valued, supported, and inspired to grow.

As a Senior Design Engineer you will be responsible for;

• Leading the design and development of mechanical systems, structural hardware, and mechanisms from early concept through production readiness.
• Creating innovative engineering solutions that meet customer requirements, performance objectives, and environmental constraints.
• Performing engineering calculations, trade studies, tolerance analyses, and evaluations to support design decisions.
• Supporting multiple development programs simultaneously while maintaining quality, schedule, and technical objectives.
• Reviewing and validating engineering analyses, calculations, and design outputs to ensure technical accuracy and compliance.
• Generating complete design packages including bills of materials, assembly drawings, and release documentation.
• Collaborating with manufacturing, quality, systems, and test engineering teams to transition designs into production and qualification.
• Providing technical support for prototype builds, hardware integration activities, development testing, and qualification efforts.
• Serving as a technical mentor to junior engineers and contributing to the growth of engineering best practices.
• Applying sound engineering judgment to solve complex technical challenges in high-performance aerospace and defense applications.

Qualifications;

• Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, or a related technical discipline.
• 6+ years of experience designing aerospace, defense, or other highly engineered products and systems.
• Demonstrated success developing hardware that has progressed through testing, qualification, and implementation.
• Strong mechanical design background with expertise in engineering drawing standards and design best practices.
• Proficiency with SolidWorks and Geometric Dimensioning & Tolerancing (GD&T).
• Experience utilizing CAD and CAE tools to support product development and engineering analyses.
• Strong understanding of mechanics, material behavior, stress analysis, and engineering fundamentals.
• Ability to interpret technical drawings, specifications, requirements, and engineering documentation.
• Experience creating and managing bills of materials, detailed drawings, and product definition packages.
• Working knowledge of military, aerospace, or commercial engineering specifications and standards.

Salary Range: $135,000 - $165,000

Location: Onsite in Mukilteo, WA

The actual salary offered is dependent on various factors including, but not limited to, location, the candidate’s combination of job-related knowledge, qualifications, skills, education, training, and experience

Note: Due to the nature of the work, only US Persons (citizens or permanent residents) need apply for this position.

All qualified applicants will receive consideration for employment and will not be discriminated against on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, age, genetic information, or pregnancy.

Compliance Notice: Alten USA is a federal contractor subject to the requirements of the Vietnam Era Veterans’ Readjustment Assistance Act (VEVRAA) and Executive Order 11246. We are an Equal Opportunity Employer and consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.

Drug Screening Requirement: As a federal contractor, Alten USA maintains a drug-free workplace. All candidates selected for employment will be required to successfully complete a pre‑employment drug screening as a condition of hire.