Senior Mechanical Engineer Jobs in Los Angeles, CA

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Sr. Mechanical Engineer (Critical Infrastructure)

SpaceX

•

Hawthorne, California, USA

Full-time

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SR. MECHANICAL ENGINEER (CRITICAL INFRASTRUCTURE) As a member of the construction and infrastructure team, you will design, build, and activate some of the world's most technically advanced manufacturing facilities. Yo
Posted 13 days ago | Updated 6 hours ago

Senior Mechanical Engineer

AECOM Corp. - Worldwide

•

Orange, California, USA

Full-time

Company Description Work with Us. Change the World. At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world's most complex challenges and build legacies for future generations. There has never been a better time to be at AECOM. With accelerating in
Posted 29 days ago | Updated 18 days ago

Senior Mechanical Engineer - MEP

The Search Solutions, LLC

•

Santa Clarita, California, USA

Full-time

Senior Mechanical Engineer will lead MEP design efforts, mentor junior staff, and help drive the continued growth of our firm. This role requires hands-on HVAC and plumbing design in Revit, strong leadership skills, and a practical understanding of construction. The ideal candidate is collaborative, detail-oriented, and ready to take an active role in project delivery, internal training, and business development. Key Responsibilities: Lead HVAC and plumbing system design for a range of building
Easy Apply
Posted 11 days ago | Updated 4 days ago

Senior Mechanical Engineer - P2S

Legence Therma LLC

•

Long Beach, California, USA

Full-time

P2S stands as a provider of professional engineering services to a broad range of markets, including higher education, healthcare, ports/harbors, industrial, entertainment, commercial, laboratories, municipal, and federal sectors. Our specialties include electrical, mechanical, plumbing, fire protection, and technology integration. Our offered services range from engineering and commissioning to construction management. With over 300 dedicated employees, P2S is an internationally recognized lead
Posted 5 days ago | Updated 6 hours ago

Senior Mechanical Engineer - Aviation & Federal (California)

Burns & McDonnell

•

Los Angeles, California, USA

Full-time

Description The Senior Mechanical Engineer will lead mechanical design project teams to create world class designs for new projects, alterations and redevelopments on a variety of projects including power, process, corporate, healthcare, pipeline, airports, institutional, industrial, manufacturing, government and military facilities. The Senior Mechanical Engineer will lead the project team throughout the design and construction process, adapting mechanical plans according to budget constraints,
Posted 60+ days ago | Updated 6 hours ago

Senior Mechanical Engineer, Stage Propulsion

Relativity Space

•

Long Beach, California, USA

Full-time

At Relativity Space, we have two audacious goals: to build the next great commercial launch company with Terran R and to become America's leading force in additive manufacturing innovation. Both contribute to our long-term vision of creating humanity's industrial base on Mars, paving the way for interplanetary life to expand the possibilities of the human experience. This journey begins right here on Earth - where we design, build, and fly rockets to deliver customer payloads to orbit. Terran R,
Posted 52 days ago | Updated 6 hours ago

Senior Mechanical Engineer-Compressors/Compression Systems

Jobot

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Fountain Valley, California, USA

Full-time

This Jobot Job is hosted by: Holly Leahy Are you a fit? Easy Apply now by clicking the "Apply Now" button and sending us your resume. Salary: $125,000 - $190,000 per year A bit about us: We are a leading energy and infrastructure engineering firm based in Southern California, with a focus on gas utility, refining, and midstream projects throughout the Western U.S. We are currently looking for a dynamic and driven individual to lead systems engineering efforts for a range of energy infrastructu
Posted 1 day ago | Updated 2 hours ago

Senior Mechanical Engineer - Aviation & Federal (California)

Burns & McDonnell

•

Brea, California, USA

Full-time

Description The Senior Mechanical Engineer will lead mechanical design project teams to create world class designs for new projects, alterations and redevelopments on a variety of projects including power, process, corporate, healthcare, pipeline, airports, institutional, industrial, manufacturing, government and military facilities. The Senior Mechanical Engineer will lead the project team throughout the design and construction process, adapting mechanical plans according to budget constraints,
Posted 60+ days ago | Updated 6 hours ago

Senior Mechanical Engineer

Pond & Company

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Remote or Peachtree Corners, Georgia, USA

Full-time

About the Position We are seeking a Senior Mechanical Engineer to join our growing Professional Design Services team in either one of the following Pond offices (Atlanta, GA; Augusta, GA; Savannah, GA; Jacksonville, FL; Tempa, FL; Port Orange, FL; Columbia, SC; Charlotte, NC; Huntsville, AL; Mobile, AL; New Orleans, LA) or as a Remote Employee. The ideal candidate possesses 10+ years of related MEP design engineering experience and wants to grow, collaborate, and innovate. In this position, the
Posted 52 days ago | Updated 6 hours ago

Senior Mechanical Engineer

SAIC

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Remote

Full-time

Job ID: 2504836 Location: REMOTE WORK, WA, US Date Posted: 2025-04-18 Category: Engineering and Sciences Subcategory: Mechanical Engr Schedule: Full-time Shift: Day Job Travel: Yes, 25 % of the Time Minimum Clearance Required: None Clearance Level Must Be Able to Obtain: Secret Potential for Remote Work: Yes Description SAIC is seeking an organized, motivated, experienced Senior Mechanical Engineer who will work effectively in a fast-paced environment, specifically with submarine laun
Posted 13 days ago | Updated 3 hours ago

Senior Mechanical Engineer - Remote Maintenance

Commonwealth Fusion Systems

•

Remote or Massachusetts, USA

Full-time

About Commonwealth Fusion Systems: Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent and new technologies, we're designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future. We're in the best position to make it happen. Since 2018, we've raised over $2 billion in capital - more than any other fusion energy company in th
Posted 36 days ago | Updated 6 hours ago

Senior Mechanical Engineer - Remote

Salas O'Brien Engineers Incorporated

•

Remote

Full-time

Senior Mechanical Engineer - Remote At Salas O'Brien we tell our clients that we're engineered for impact. This passion for making a difference applies just as much to our team as it does to our projects. That's why we're committed to living our values every day: inspiring, achieving, and connecting as shared owners of our success with a focus on a sustainable future. Building for the long-term means that all of our team members can expect to work on amazing projects with a people-first approac
Posted 60+ days ago | Updated 6 hours ago

Senior Mechanical Engineer (Hybrid)

Westinghouse Electric Company LLC

•

Remote or Rock Hill, South Carolina, USA

Full-time

Are you interested in being part of a creative team that supports Westinghouse's mission to provide clean energy solutions? At Westinghouse, we recognize that our employees are our most valuable asset, and we want to identify the most qualified talent while recognizing and encouraging the value of diversity in the global workplace. If this sounds like an environment you would thrive in, we have an exciting opportunity as a Senior Mechanical Engineer. The Senior Mechanical Engineer will report to
Posted 60+ days ago | Updated 6 hours ago

Senior Fluids Mechanical Engineer

Relativity Space

•

Long Beach, California, USA

Full-time

At Relativity Space, we have two audacious goals: to build the next great commercial launch company with Terran R and to become America's leading force in additive manufacturing innovation. Both contribute to our long-term vision of creating humanity's industrial base on Mars, paving the way for interplanetary life to expand the possibilities of the human experience. This journey begins right here on Earth - where we design, build, and fly rockets to deliver customer payloads to orbit. Terran R,
Posted 52 days ago | Updated 6 hours ago

Senior Electro-Mechanical Engineer

Relativity Space

•

Long Beach, California, USA

Full-time

At Relativity Space, we have two audacious goals: to build the next great commercial launch company with Terran R and to become America's leading force in additive manufacturing innovation. Both contribute to our long-term vision of creating humanity's industrial base on Mars, paving the way for interplanetary life to expand the possibilities of the human experience. This journey begins right here on Earth - where we design, build, and fly rockets to deliver customer payloads to orbit. Terran R,
Posted 52 days ago | Updated 6 hours ago

Senior Avionics Mechanical Design Engineer

Relativity Space

•

Long Beach, California, USA

Full-time

At Relativity Space, we have two audacious goals: to build the next great commercial launch company with Terran R and to become America's leading force in additive manufacturing innovation. Both contribute to our long-term vision of creating humanity's industrial base on Mars, paving the way for interplanetary life to expand the possibilities of the human experience. This journey begins right here on Earth - where we design, build, and fly rockets to deliver customer payloads to orbit. Terran R,
Posted 33 days ago | Updated 6 hours ago

Senior Avionics Mechanical Product Engineer

Relativity Space

•

Long Beach, California, USA

Full-time

At Relativity Space, we have two audacious goals: to build the next great commercial launch company with Terran R and to become America's leading force in additive manufacturing innovation. Both contribute to our long-term vision of creating humanity's industrial base on Mars, paving the way for interplanetary life to expand the possibilities of the human experience. This journey begins right here on Earth - where we design, build, and fly rockets to deliver customer payloads to orbit. Terran R,
Posted 40 days ago | Updated 6 hours ago

Mass Properties Engineer Sr - Mechanical Engineer

Lockheed Martin Corporation

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Remote or King of Prussia, Pennsylvania, USA

Full-time

Job Description Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more - we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We're creating future-ready solutio
Posted 13 days ago | Updated 6 hours ago

MEP Mechanical Engineer

The Search Solutions, LLC

•

Santa Clarita, California, USA

Full-time

Senior Mechanical Engineer will lead MEP design efforts, mentor junior staff, and help drive the continued growth of our firm. This role requires hands-on HVAC and plumbing design in Revit, strong leadership skills, and a practical understanding of construction. The ideal candidate is collaborative, detail-oriented, and ready to take an active role in project delivery, internal training, and business development. Key Responsibilities: Lead HVAC and plumbing system design for a range of building
Easy Apply
Posted 2 days ago

Mechanical Engineer

GEI Consultants, Inc.

•

Pasadena, California, USA

Full-time

Description Your role at GEI. GEI's Mechanical engineering group needs staff to support its growing client base and is seeking an associate to senior level Mechanical Engineer. This is an excellent opportunity for a highly motivated individual to join our team. The successful candidate must have excellent academic credentials and a strong desire to work on a broad range of small to larger size projects related to water resources from planning to final design, construction engineering support, a
Posted 60+ days ago | Updated 6 hours ago