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Senior Mechanical Design Engineer Jobs in Renton, WA

System One

Senior Mechanical Design Engineer

Bellevue, WA · Remote

$92K - $126K/yr

Senior Mechanical Design Engineer (Core Components) Location: Bellevue, WA Job Type: Contract - Remote Schedule: 40 hours/week System One is seeking a highly motivated Senior Mechanical Design ...

Actalent

Senior Mechanical Design Engineer

Bothell, WA · On-site

$102K - $140K/yr

Senior Mechanical Design Engineer The Senior Mechanical Design Engineer plays a key role in the design, procurement, fabrication, assembly, integration, start-up, and commissioning of very large ...

Protingent

Senior Mechanical Design Engineer

Bellevue, WA · On-site

$52 - $85/hr

Senior Mechanical Design Engineer Position Description: Protingent Staffing has an exciting contract Senior Mechanical Design Engineer opportunity. Job Responsibilities: * Coordinate and utilize ...

Amazon

Sr. Mechanical Design Engineer

Redmond, WA · On-site

$100K - $138K/yr

The Sr. Mechanical Design Engineer will be a member of the Amazon Leo Inter-Satellite Link team, focusing on the design of the various mechanical ground support equipment (GSE), including assembly ...

Amazon

Sr. Mechanical Design Engineer

Redmond, WA

$100K - $138K/yr

The Sr. Mechanical Design Engineer will be a member of the Amazon Leo Inter-Satellite Link team, focusing on the design of the various mechanical ground support equipment (GSE), including assembly ...

Amazon

Sr. Mechanical Design Engineer

Redmond, WA · On-site

$100K - $138K/yr

The Sr. Mechanical Design Engineer will be a member of the Amazon Leo Inter-Satellite Link team, focusing on the design of the various mechanical ground support equipment (GSE), including assembly ...

Blue Origin, LLC

Senior Mechanical Design Engineer

Seattle, WA · On-site

$102K - $141K/yr

As a Senior Mechanical Design Engineer, you will lead the development of the propulsion system mechanical designs. You will work with propulsion team members to create propulsion system and subsystem ...

Blue Origin

Senior Mechanical Design Engineer

Seattle, WA · On-site

$102K - $141K/yr

As a Senior Mechanical Design Engineer, you will lead the development of the propulsion system mechanical designs. You will work with propulsion team members to create propulsion system and subsystem ...

System One

Senior Mechanical Design Engineer

Bellevue, WA · Remote

$52 - $85/hr

Senior Mechanical Design Engineer Location: Bellevue, WA Type: Contract Compensation: $52.00 - $85.00 Onsite work model, remote work model available for exceptionally qualified non-local candidates.

System One

Senior Mechanical Design Engineer

Bellevue, WA · Remote

$52 - $85/hr

Senior Mechanical Design Engineer Location: Bellevue, WA Type: Contract Compensation: $52.00 - $85.00 Onsite work model, remote work model available for exceptionally qualified non-local candidates.

System One

Senior Mechanical Design Engineer

Bellevue, WA · Remote

$52 - $85/hr

Senior Mechanical Design Engineer Location: Bellevue, WA Type: Contract Compensation: $52.00 - $85.00 Onsite work model, remote work model available for exceptionally qualified non-local candidates.

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Senior Mechanical Design Engineer information

See Renton, WA salary details

$81K

$122.1K

$169.8K

How much do senior mechanical design engineer jobs pay per year?

As of Aug 12, 2026, the average yearly pay for senior mechanical design engineer in Renton, WA is $122,112.00, according to ZipRecruiter salary data. Most workers in this role earn between $101,200.00 and $139,500.00 per year, depending on experience, location, and employer.

What are some common challenges faced by senior mechanical design engineers in cross-functional project teams?

Senior Mechanical Design Engineers often work closely with professionals from electrical, manufacturing, and software disciplines. A common challenge is ensuring seamless integration of mechanical components with other systems while balancing design intent, cost, and manufacturability. Effective communication and adaptability are crucial, as conflicting priorities or technical constraints may arise during the development cycle. Proactively addressing these issues through regular collaboration and clear documentation helps maintain project timelines and product quality.

What is the difference between Senior Mechanical Design Engineer vs Mechanical Design Engineer?

AspectSenior Mechanical Design EngineerMechanical Design Engineer
Required CredentialsBachelor's or Master's in Mechanical Engineering, professional certifications often preferredBachelor's degree in Mechanical Engineering or related field
Work EnvironmentDesign teams, R&D departments, manufacturing firmsDesign teams, product development, manufacturing settings
Employer & Industry UsageEngineering firms, manufacturing companies, aerospace, automotiveSimilar industries, often entry to mid-level roles

The main difference between a Senior Mechanical Design Engineer and a Mechanical Design Engineer lies in experience, responsibility, and expertise. Senior engineers typically lead projects, mentor junior staff, and handle complex design challenges, while Mechanical Design Engineers focus on executing design tasks under supervision. Both roles require a strong foundation in mechanical engineering principles and relevant certifications, but senior roles demand more experience and leadership skills.

What does a senior mechanical design engineer do?

A Senior Mechanical Design Engineer is responsible for leading the design and development of mechanical systems, components, and products. They use advanced engineering principles and software to create detailed designs, oversee prototype development, and ensure that projects meet technical standards and client requirements. They often mentor junior engineers, collaborate with cross-functional teams, and participate in problem-solving during the manufacturing process. Their expertise is crucial for ensuring the reliability, safety, and efficiency of mechanical products.

What are the key skills and qualifications needed to thrive as a senior mechanical design engineer?

To thrive as a Senior Mechanical Design Engineer, you need advanced knowledge of mechanical engineering principles, proficiency in design analysis, and a relevant engineering degree, often backed by professional certification (e.g., PE license). Expertise with CAD software such as SolidWorks or AutoCAD, simulation tools like ANSYS, and familiarity with product lifecycle management systems are typically required. Strong problem-solving, leadership, and collaboration skills help you manage complex projects and mentor junior engineers. These capabilities ensure the creation of innovative, reliable products while meeting project deadlines and maintaining engineering standards.
What are popular job titles related to Senior Mechanical Design Engineer jobs in Renton, WA? For Senior Mechanical Design Engineer jobs in Renton, WA, the most frequently searched job titles are:
What job categories do people searching Senior Mechanical Design Engineer jobs in Renton, WA look for? The top searched job categories for Senior Mechanical Design Engineer jobs in Renton, WA are:
What cities near Renton, WA are hiring for Senior Mechanical Design Engineer jobs? Cities near Renton, WA with the most Senior Mechanical Design Engineer job openings:
Senior Mechanical Design Engineer jobs near you
Infographic showing various Senior Mechanical Design Engineer job openings in Renton, WA as of August 2026, with employment types broken down into 1% Internship, 86% Full Time, 9% Part Time, and 4% Contract. Highlights an 82% Physical, 6% Hybrid, and 12% Remote job distribution, with an average salary of $122,112 per year, or $58.7 per hour.

Senior Mechanical Design Engineer

System One Holdings, LLC

Bellevue, WA • On-site

$52 - $85/hr

Full-time

Re-posted 26 days ago

Job description

Senior Mechanical Design Engineer (Core Components)
Location: Bellevue, WA
Job Type: Contract - Remote
Schedule: 40 hours/week
System One is seeking a highly motivated Senior Mechanical Design Engineer (Core Components) to support the design and development of advanced nuclear reactor technologies. This role focuses on the conceptual and preliminary design of reactor core components, reactor structures, and Nuclear Island equipment for next-generation nuclear energy systems.
The ideal candidate has extensive experience in mechanical equipment design, structural analysis, and product development, with the ability to collaborate across multidisciplinary engineering teams to deliver innovative engineering solutions.
Responsibilities
  • Develop mechanical design solutions for reactor core components, reactor structures, and Nuclear Island equipment.
  • Coordinate engineering requirements and inputs from cross-functional project teams to produce detailed designs, models, drawings, and engineering specifications.
  • Plan and execute design activities while maintaining project schedules and technical objectives.
  • Develop and support testing strategies to validate functional and performance requirements.
  • Perform design trade studies, feasibility evaluations, and scoping analyses.
  • Collaborate with structural, thermal, nuclear, manufacturing, and systems engineering teams throughout the design process.
  • Perform engineering reviews of drawings, calculations, analyses, and technical documentation.
  • Provide technical guidance and mentorship to engineers, designers, suppliers, and subcontractors.
  • Support continuous improvement initiatives and implement engineering best practices throughout the design lifecycle.
  • Participate in design reviews and resolve technical issues during development and manufacturing.

Required Qualifications
  • Bachelor's degree in Mechanical Engineering or a related engineering discipline.
  • Minimum 5 years of mechanical equipment or component design experience. Advanced degrees may be considered toward years of experience.
  • Experience developing mechanical designs using 3D CAD, preferably SolidWorks.
  • Experience designing and executing engineering test programs with an emphasis on product validation.
  • Strong background in finite element stress analysis, mechanical analysis methods, and first-principles engineering calculations.
  • Knowledge of Design for Manufacturability (DFM) and Design for Assembly (DFA) principles.
  • Strong analytical, problem-solving, and technical communication skills.
  • Ability to manage multiple engineering tasks and priorities simultaneously.
  • Excellent attention to detail and ability to work independently with minimal supervision.

Preferred Qualifications
  • Experience or familiarity with ASME Boiler & Pressure Vessel Code Section III, Division 5.
  • Mechanical design experience supporting commercial nuclear, advanced reactor, or other highly regulated industries.
  • Experience designing reactor core assemblies or other nuclear reactor components.
  • Knowledge of DOE and NRC regulations.
  • Working knowledge of neutronics, thermal-hydraulics, and structural analysis.
  • Experience leading multidisciplinary engineering design efforts.
  • Experience performing finite element analysis using ANSYS.
  • Experience developing nuclear equipment test plans, test requirements documents, and qualification programs.
  • Experience supporting manufacturing processes, first article production, and design for production.
  • Experience evaluating suppliers, reviewing technical deliverables, and resolving vendor nonconformances.

Additional Information
  • Travel: Up to 5%
  • Work Environment: Standard office environment.
  • Physical Requirements: Ability to sit or stand for extended periods, perform computer-based work, and lift up to 25 pounds as needed.

Ref: #161-Managed Staffing Charlotte

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