Senior Development Engineer

The Senior Development Engineer is a hands-on mechanical product development lead responsible for advancing aerospace hardware from concept through detailed design, prototype fabrication, testing, and customer delivery. The role combines mechanical and electromechanical engineering, project execution, customer interaction, proposal support, and cross-functional technical leadership.

• Lead the planning, organization, and execution of mechanical system development projects.
• Guide concept development and mechanical or electromechanical system design.
• Perform or oversee hands-on 3D CAD and detailed mechanical design.
• Coordinate multidisciplinary analysis, development, prototype fabrication, and testing.
• Develop test plans and test procedures.
• Help program and project leaders meet customer objectives on schedule and within budget.
• Support proposal development involving advanced mechanical and electromechanical technologies.
• Interact directly with customers to define needs, present proposals, and participate in project reviews.
• Collaborate with engineering and technical teams on proposal development and project execution.
• Support business development by aligning technical capabilities with customer requirements.

• Strong mechanical engineering foundation.
• Experience in aerospace mechanical system or hardware development.
• Hands-on 3D CAD experience.
• SolidWorks experience preferred, but comparable 3D CAD experience may be considered.
• GD&T knowledge and the ability to produce or interpret manufacturable engineering drawings.
• Experience developing test plans and test procedures.
• Experience taking hardware through concept, design, prototype, and testing.
• Working knowledge of heat transfer, structural analysis, dynamics and kinematics, advanced materials, and machine design.
• Demonstrated ability to plan and execute engineering projects.
• Bachelor’s or master’s degree in Mechanical or Aerospace Engineering.

• SolidWorks experience is preferred.
• Strong GD&T and drawing-release experience.
• Experience in mechanical and electromechanical product development.
• Aerospace prototype fabrication and testing.
• Qualification or environmental testing.
• Structural and thermal analysis.
• Dynamics and kinematics.
• Advanced or high-strength materials.
• Customer-facing engineering.
• Proposal development or technical business development support.
• Experience coordinating work across design, analysis, manufacturing, test, program management, and customers.
• Hypersonic, missile, propulsion, space, or defense-hardware development.

The position involves heavy involvement with mechanical and electromechanical product development and frequent collaboration with multidisciplinary engineering teams. There is direct customer interaction for needs-definition, proposal reviews, and project reviews. The role supports active aerospace and defense hardware development programs. The work environment offers a 9/80 work schedule, including every other Friday off, and a company holiday shutdown. Benefits include a full package with medical, dental, vision, 401(k) match, PTO, HSA contribution, FSA options, company-paid life and AD&D insurance, disability coverage, and tuition reimbursement.

This is a Permanent position based out of Mukilteo, WA.

The pay range for this position is $135000.00 - $160000.00/yr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

-Medical, dental, and vision insurance -401(k) with company match -Paid time off -Health Savings Account (HSA) with company contribution -Flexible Spending Accounts (FSA) -Company‑paid life and AD&D insurance -Short‑ and long‑term disability coverage -Tuition reimbursement

This is a fully onsite position in Mukilteo,WA.

This position is anticipated to close on Sep 25, 2026.

About Actalent

Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 20,000 consultants and 5,000 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500. We are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing® winner for both client and talent service.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email actalentaccommodation@actalentservices.com for other accommodation options.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.

Salary : $135,000 - $160,000