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100 mechanical engineer senior jobs found

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Onsite mechanical engineer senior Washington
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HA
Apr 20, 2026
Full time
Senior Mechanical Engineer
$140,000 - $170,000 yearly
Heven AeroTech Bingen, WA
Title: Senior Mechanical Engineer Company: Heven AeroTech Location: Bingen, Washington FLSA: Exempt About Our Company: At Heven AeroTech (Heven), we don't just believe in the power of people-we build our success on it. As a recognized leader in hydrogen-powered drones, we've earned recognition for creating a workplace where innovation thrives, collaboration is second nature, and every employee feels valued. Our culture is anchored in trust and a shared commitment to excellence. We believe great teams are built on individuals who are humble, hungry, and smart -those who put team success first, take initiative to continuously improve, and demonstrate strong interpersonal awareness. At Heven, your voice matters, your ideas are heard, and your contributions make a tangible impact as you grow through hands-on experience and collaboration across the team. Role Summary: The Senior Mechanical Engineer is a highly skilled engineer with deep expertise in mechanical...
SP
Apr 08, 2026
Full time
Senior Mechanical Design Engineer
Simplexity Product Development Seattle, WA
Simplifying the Complex. Simplexity is a product development engineering firm, hired by leading technology companies to design their next generation products. In an industry of overly-complex design and production, we strive for simplicity, reducing product cost and improving reliability for our clients through our Product Development Process. Why join Simplexity Product Development? If you're an engineer who likes variety in your job, you'll fit right in here. Simplexity works across a breadth of projects - from robotics and IoT to medical devices, consumer wearables, automation and more. You won't be siloed into one tiny piece of the organization; you'll roll up your sleeves and help solve real, difficult problems for demanding clients who expect excellence. Our teams are tight, collaborative, and made up of folks who genuinely want to build something cool and delight our customers. Yet that doesn't mean grinding for 60-hours per week, week-over-week. We believe that...
RL
Apr 04, 2026
Full time
Senior Mechanical Engineer
Rice Lake Kent, WA
For 80 years Rice Lake Weighing Systems has been a successful, growth-oriented company known as a leader in the weighing industry and our community. Measurement Systems International, a Rice Lake Weighing Systems Company, is seeking a Senior Mechanical Engineer to join our team in Kent, WA. The Senior Mechanical Engineer is responsible for the design, development, and validation of new and custom products to meet customer specifications. This role places a strong emphasis on strain gage-based load cell transducer design and development, including mechanical design for optimized strain distribution, signal sensitivity, and long-term stability. The position also includes hands-on involvement in testing, calibration, and troubleshooting of load cell performance, along with exposure to experimental stress analysis and validation techniques. This role also requires working knowledge of the electrical aspects of load cell systems, including strain gage signal behavior, Wheatstone...
FC
Mar 27, 2026
Contractor
Senior Mechanical Engineer
$75.00 - $85.00 hourly
Fresh Consulting Redmond, WA
Fresh Consulting is a design-led, software development and hardware engineering company, offering end-to-end digital services to help companies innovate. We bring together amazing UX designers, sophisticated developers, digital strategists, and top-notch engineers to help companies create fresh experiences that connect humans, systems, and machines. We've been growing fast and need someone to help us continue to manage the delivery of high-quality work in a fast-paced environment. See more at freshconsulting.com Visit freshconsulting.com/portfolio to see our project work across several industries. View and apply to all jobs - https://freshconsulting.applytojob.com/apply/ or visit freshconsulting.com/careers Title: Senior Mechanical Engineer Location: Onsite in Redmond, WA Benefits: Employee benefits at 100% including Medical, PTO, Holiday Pay, 401K Plan and much more! Hours: Minimum 40 Hours/Week Job Description Lead exploration, prototyping, maturing and implementation of...
IC
Mar 19, 2026
Full time
Senior Mechanical Engineer
$125,000 - $250,000 yearly
Interlune Corporation Seattle, WA
Interlune is a space resources company based in Seattle, WA. We will provide resources from space to power a clean and sustainable economy on Earth and in space. We are looking for a Doer who wants to join our early-stage team and accelerate humanity's progress toward an off-world future. Our engineering team combines expert knowledge of geological sciences, mechanical engineering, automation, systems engineering, modeling and simulation, and advanced fabrication to build the infrastructure that will create an in-space economy. To join our small team, you must be agile, willing to learn, and able to take on multiple roles as needed. This role will report to the Vice President of Engineering and bring significant expertise in space robotics, particularly for planetary surface operations. Applicants from all industries are welcome, with particular emphasis in complex, multi-disciplinary system development. Responsibilities: Lead the design of high-reliability mechanisms,...
BH
Feb 22, 2026
Full time
Senior Mechanical Engineer
$90,000 - $120,000 yearly
Buro Happold WA
Start designing tomorrow's future! Buro Happold has an exciting opportunity for a talented Senior Mechanical Engineer to join our hybrid team in Washington, DC! As a Senior Mechanical Engineer you will have the opportunity to lead design for mechanical engineering across a portfolio of ground-breaking projects in the US and globally . Strong communication skills and teamwork are essential to life at Buro Happold and in turn, we can offer you unrivalled career, project, and development opportunities. Here at Buro Happold, expect the exceptional. From the projects you will work on to the clients we work with. From career-defining opportunities to an inclusive and diverse practice where we all contribute to a more equitable world . From our reputation to our relationships. Wherever your Buro Happold career takes you, it'll be anything but ordinary. Your next role Join us and be surrounded by exceptional opportunities in an environment alive with innovation and...
nL
Jan 24, 2026
Full time
Senior Mechanical Engineer - Defense
nLIGHT Camas, WA
Description Who We Are At nLIGHT, we are constantly on the cutting-edge of laser technology in a massively growing market. We are a leading provider of high-power semiconductors and fiber lasers for industrial, microfabrication, and aerospace & defense applications, to name a few. Our lasers are changing not only the way things are made, but also changing the things that can be made. Headquartered in Camas, Washington, nLIGHT is a publicly listed company (NASDAQ: LASR). Position Summary nLIGHT is seeking a Senior Mechanical Engineer to contribute to the development of high-power fiber laser amplifiers and directed-energy laser systems. This role requires strong opto-mechanical design skills and hands-on experience developing rugged, production-ready hardware for demanding military environments. The Senior Mechanical Engineer will work within a multidisciplinary team spanning optical, electrical, thermal, and systems engineering, with primary responsibility for...
HE
Mar 01, 2026
Full time
Senior Mechanical Engineer, Thermal
Helion Energy Everett, WA
About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy,...
HE
Mar 01, 2026
Full time
Senior Mechanical Engineer, Diagnostics
Helion Energy Everett, WA
About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy,...
HE
Mar 01, 2026
Full time
Senior Mechanical Engineer, Modules
Helion Energy Everett, WA
About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy,...
HE
Mar 01, 2026
Full time
Senior Mechanical Engineer, Fluids
Helion Energy Everett, WA
About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy,...
HE
Mar 01, 2026
Full time
Senior Mechanical Engineer
Helion Energy Everett, WA
About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy,...
AT
Dec 25, 2025
Full time
Senior Mechanical Engineer
$140,000 - $165,000 yearly
ALTEN Technology USA Everett, WA
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. Primary Responsibilities: Participate in and lead cross functional teams to create, release and support state of the art products. Manage changes to...
Romac Industries
May 12, 2026
Full time
Manufacturing Engineer III
Romac Industries Bothell, WA
Are you someone who thrives on bringing innovative ideas to life and solving complex engineering challenges? We're seeking a Senior Manufacturing Engineer to join our dynamic team. In this role, you'll be at the forefront of developing and improving manufacturing processes for both existing and new products. If you're known for your creativity, problem-solving skills, and ability to work independently, this could be the perfect opportunity for you. As a Senior Manufacturing Engineer, you'll have the chance to showcase your ingenuity by applying engineering principles to overcome a variety of design, process, and production issues. You'll play a key role in defining the technical direction of projects, often serving as a leader and mentor to other team members. Your responsibilities will span the entire manufacturing development cycle, from DFM to final production, ensuring that our manufacturing processes are efficient and effective.  Plus, you'll have the opportunity to lead a...
Romac Industries
May 12, 2026
Full time
Mechanical Design Engineer III
Romac Industries Bothell, WA
Step into an exciting opportunity as a Senior Mechanical Engineer at Romac. In this senior-level role, you’ll design, develop new products, improve existing ones by applying advanced engineering principles and creative problem-solving. You’ll define technical approaches, lead mid-sized projects, guide junior engineers and technicians through all stages of the product development cycle, from concept to production. You’ll play a key part in driving innovation, improving product performance, and strengthening Romac’s ability to deliver reliable waterworks solutions that keep communities connected.   What You’ll Do Lead the design and development of new or modified products, from concept through testing and production release. Resolve complex production and design challenges using expert-level technical knowledge across multiple disciplines. Develop and implement production capabilities, procedures, and quality protocols to ensure efficient and consistent manufacturing....
HL
Apr 26, 2026
Full time
Senior Overhead Contact System (OCS) Engineer
$170,000 - $230,000 yearly
Hatch Ltd Seattle, WA
Requisition ID: 96964 Job Category: Infrastructure; Consulting; Engineering; Project Engineering; Project Management Location: Seattle, WA, United States Join a company that is passionately committed to the pursuit of a better world through positive change. With more than 65 years of business and technical expertise in mining, energy, and infrastructure, our 10,000 colleagues in 150 countries tirelessly work toward bettering the industries in which we operate. With practical solutions that are safe, innovative and sustainable, we think globally while acting locally. Are you looking for an opportunity to join a diverse group of professionals who are committed to remaining exceptional? We look forward to hearing from you. Our expertise in infrastructure includes aviation, highways and bridges, planning and advisory services, ports, rail and transit, tunnels, and water. Want to be part of the creation and construction of our cities? Then the infrastructure team is for you!...
JI
Apr 26, 2026
Full time
Chief Engineer
$150,000 - $200,000 yearly
Janicki Industries Hamilton, WA
Janicki Industries is an innovative, family-owned aerospace company located at the foot of the Cascades. We focus on engineering and manufacturing complex projects for companies in the aerospace, defense, and space industries. We are looking for a Chief Engineer to join our growing team. This position is located on-site in Hamilton, Washington State. POSITION DESCRIPTION The Chief Engineer is responsible for providing senior technical leadership across engineering programs, ensuring alignment with customer requirements, quality standards, and organizational goals. This role guides multidisciplinary teams through complex engineering challenges, oversees the execution of technical deliverables, and drives continuous improvement in engineering practices. The Chief Engineer ensures engineering excellence and innovation while fostering collaboration with internal and external stakeholders. This role demands a hands-on, self-motivated, and highly intelligent professional who...
On
Apr 25, 2026
Full time
New Graduate Engineer
$65,000 yearly
Ontivity LLC Gig Harbor, WA
Ontivity is a leader in engineering, technology deployment, and construction services for the wireless industry. Our proven track record for safety and quality position us to work with the nation's major wireless carriers, tower owners, and technology providers. As one of the largest wireless infrastructure companies in the industry, our breadth of knowledge and technical expertise help our customers design, build, optimize, and maintain reliable wireless networks. At Ontivity, Safety is our Core Value. Everything we do begins and ends with this thought. We are looking for potential employees who share this mindset and are also responsive to customer needs, results-oriented, and relentlessly focused on doing the job the right way - regardless of the obstacles - and the safest way. If this describes you and you are interested in working with people who share these same values, we want to hear from you! Job Summary Ontivity is seeking a New Graduate Engineer (Civil, Electrical, or...
JI
Apr 24, 2026
Full time
Staff Engineer
Janicki Industries Sedro-Woolley, WA
Janicki Overview: At Janicki Industries, we turn complex ideas into real-world solutions through advanced engineering and manufacturing. Our teams design and build innovative structures, tooling, and systems that support industries including aerospace, space, defense, marine, and architecture. Across every role, from engineers and technicians to operations and support teams, our people help solve challenging problems, push the limits of design and manufacturing, and create solutions that make a lasting impact. Position Description Staff Engineers are recognized technical authorities who lead the development of innovative solutions, guide technical strategy, and solve the most complex engineering challenges across the organization. They break down large-scale problems into actionable work for others, mentor technical leaders, and influence company-wide technical direction. This position is located on-site in Hamilton, Bellingham, and Sedro-Woolley, Washington State....
HA
Apr 20, 2026
Full time
Mechanical Engineer I
$90,000 - $120,000 yearly
Heven AeroTech Bingen, WA
Title: Mechanical Engineer I Company: Heven AeroTech Location: Bingen, Washington FLSA: Exempt About Our Company: At Heven AeroTech (Heven), we don't just believe in the power of people-we build our success on it. As a recognized leader in hydrogen-powered drones, we've earned recognition for creating a workplace where innovation thrives, collaboration is second nature, and every employee feels valued. Our culture is anchored in trust and a shared commitment to excellence. We believe great teams are built on individuals who are humble, hungry, and smart -those who put team success first, take initiative to continuously improve, and demonstrate strong interpersonal awareness. At Heven, your voice matters, your ideas are heard, and your contributions make a tangible impact as you grow through hands-on experience and collaboration across the team. Role Summary: The Mechanical Engineer I supports the design, documentation, testing, and integration of mechanical systems...
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