Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Mechanical Engineer

Piper Maddox

We are partnering with a rapidly growing organization delivering a major, technically complex facility within the advanced energy sector. As the project progresses through engineering and construction, they are looking to add an experienced Mechanical Engineer to take ownership of critical mechanical and process systems.

This is a hands-on engineering position suited to someone who has worked on complex facilities within nuclear, oil & gas, chemicals, power generation, industrial manufacturing or another highly regulated process environment .

The Role

You will be responsible for mechanical and piping systems throughout the project lifecycle, working closely with engineering, procurement, equipment suppliers and construction teams.

Key responsibilities will include:

  • Engineering and design of piping, fluid and mechanical systems
  • Developing and reviewing specifications, calculations, drawings and technical documentation
  • Reviewing piping layouts, equipment designs and vendor documentation
  • Supporting ASME B31.3 process piping design and compliance
  • Providing technical oversight of equipment suppliers and fabrication activities
  • Supporting procurement and technical bid/vendor evaluations
  • Reviewing and supporting FAT/SAT testing
  • Working directly with construction teams to resolve field engineering issues
  • Conducting equipment and system walkdowns during installation
  • Supporting system turnover, testing and commissioning activities
  • Ensuring engineering activities meet applicable quality and regulatory requirements

We are interested in experienced mechanical engineers with a strong background in some

combination of:

  • ASME B31.3 Process Piping
  • Piping design and/or stress analysis
  • Fluid and thermal systems
  • Tanks, pressure-containing equipment or mechanical equipment
  • HVAC or industrial ventilation systems
  • Pumps, valves and associated instrumentation
  • Equipment specification and vendor management
  • Engineering support during construction
  • Quality-controlled or highly regulated engineering environments

This is an opportunity to join a well-funded organization at an important stage of project delivery and have direct involvement in taking engineered systems from design through procurement, construction, testing and operation .

Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Senior Mechanical Engineer in Los Angeles, CA vacancy
  • $150k - $183k

     ...solutions. Join our dynamic team and help shape a smarter, greener future for global freight.Senior Mechanical EngineerParallel Systems is seeking a Senior Mechanical Engineer with expertise in dynamics, simulation, and CAD design to help us design the next generation... 
    Senior
    Local area
    Shift work

    Parallel Systems

    Los Angeles, CA
    6 days ago
  • $110k - $160k

     ...our communities, and our planet. If this sparks your interest, you’re in the right place.DLR Group has an opening for a Senior Mechanical Engineer.Locations: Los Angeles, CAPosition SummaryAs a Senior Mechanical Engineer, you will be responsible for leading design of... 
    Senior
    Work at office

    DLR Group

    Los Angeles, CA
    1 day ago
  • $131k - $182k

     ...elevate design, push boundaries and create a more resilient future. The Los Angeles office of SmithGroup is looking for a Senior Mechanical Engineer to join our team. Working with us, you will: Serve as the engineering leader through all stages of a project of any size... 
    Senior
    For contractors
    Work at office
    Local area

    SmithGroup

    Los Angeles, CA
    4 days ago
  • $84.7k - $144.43k

     ...clients, our communities, and our planet. If this sparks your interest, you’re in the right place.DLR Group has an opening for a Mechanical Engineer with a focused skillset on data center projects. Position SummaryThe Mechanical Engineer for Mission Critical Projects is... 
    Senior
    Work at office

    DLR Group

    Los Angeles, CA
    4 days ago
  • $121.65k - $194.3k

     ...Francisco, CA, United StatesDepartment: Mechanical EngineeringBusiness Unit: ANA United StatesWork...  ...company delivering sustainable design, engineering, and consultancy solutions for natural...  ...in California is seeking an experienced Senior Process Mechanical Design Engineer to... 
    Senior
    Full time
    Part time
    Work at office
    Local area

    Arcadis

    Los Angeles, CA
    2 days ago
  • $180k - $225k

     ...Senior Mechanical Engineer – Structures Los Angeles $180k–$225k Base + Benefits Certus Recruitment is partnering with an advanced aerospace business developing next-generation re‑entry systems and seeking a Senior Mechanical Engineer (Structures) to play a critical... 
    Senior

    Certus Sales Recruitment

    Los Angeles, CA
    1 day ago
  • $129.1k - $146.7k

     ...your career, to our members and to the clients and communities we serve. Our West Coast healthcare team is looking for a Senior Mechanical Engineer to join our multi-disciplinary team anchored in San Francisco, Los Angeles or Oakland. Arup is known for designing innovative... 
    Senior
    Local area
    Remote work
    Flexible hours

    Arup

    Los Angeles, CA
    5 days ago
  • $148k - $181k

     ...brilliant people to do brilliant things in engineering, management, and development services,...  ...but are not limited to:Designing mechanical (HVAC, Plumbing and Fire Protection) systems...  ...and specifications under the direction of senior engineers or project managersPerform studies... 
    Senior
    Contract work
    Temporary work
    Work at office
    Immediate start
    3 days per week

    Mott MacDonald

    Los Angeles, CA
    5 days ago
  •  ...Senior Mechanical Engineer - Test (Space Hardware) We are seeking a Senior Mechanical Engineer - Test to build and own the test and qualification infrastructure for next-generation hardware. This is a zero-to-one role -you will define how hardware is tested... 
    Senior

    People Placers Staffing

    Playa Vista, CA
    2 days ago
  • $110.3k - $165.5k

     ...grow professionally at one of the world’s top design firms while building our clean energy future.Stantec is actively seeking Mechanical Engineers with a minimum of 10 years of professional experience in hydroelectric turbine and generator projects, dam outlet works, and... 
    Senior
    Full time
    Temporary work
    Part time
    Casual work
    Work at office
    Local area
    Flexible hours

    Stantec

    Pasadena, CA
    3 days ago
  •  ...Mechanical Design EngineerAbout the Company: Aerospace & Defense startup currently in stealth based in El Segundo, made up of former SpaceX, Anduril, and Lockheed engineers, to develop and mass produce life-saving systems. Backed by joint staff level military leadership... 
    Senior
    Permanent employment
    Immediate start

    Singularity Defense

    Gardena, CA
    6 hours ago
  •  ...Senior Mechanical Engineer Are you passionate about mechanical design and committed to crafting custom industrial machinery of the utmost quality? Join our team of dedicated engineers who take pride in delivering excellence to our esteemed clients. We specialize in... 
    Senior

    Essel Environmental

    Downey, CA
    4 days ago
  •  ...Senior Mechanical Engineer Come join one of the fastest growing firms in the US! We are seeking a well-established Sr. Mechanical Engineer to play a critical, leading role in our fast-growing, non-traditional, technology company. In this role, the Sr. Mechanical... 
    Senior

    Ecosense Lighting

    Los Angeles, CA
    2 days ago
  •  ...Job Description Insight Global is seeking a Senior Mechanical Design Engineer for a top aerospace and advanced defense technology client. This engineer will play a critical role in the design, packaging, development, and rapid iteration of hardware supporting spacecraft... 
    Senior

    Insight Global

    Los Angeles, CA
    4 days ago
  •  ...Senior Mechanical Engineer (HVAC) Lead the design, analysis, and delivery of HVAC and mechanical building systems Collaborate with clients, architects, and internal teams to deliver high-quality projects on time and within budget Key Responsibilities Define... 
    Senior

    Liberty Personnel Services, Inc.

    Los Angeles, CA
    2 days ago
  • $160k - $225k

     ...Senior Mechanical Engineer - Vehicle Structures (Full-Lifecycle Architect) Location: Los Angeles, CA (Playa Vista area) - 100% On-site Compensation: $160,000 - $225,000 Base (+ Equity + Bonuses) Clearance: US Citizen or Green Card Holder required (... 
    Senior
    Relocation package

    People Placers Staffing

    Los Angeles, CA
    19 hours ago
  • $150k - $190k

     ...Senior Mechanical Engineer CHAOS Industries builds advanced sensing and detection systems for warfighters, commercial air operators, and border protection teams. Their products are powered by Coherent Distributed Networks (CDN), a proprietary architecture that enables... 
    Senior

    Rethink recruit

    Hawthorne, CA
    4 days ago
  •  ...Mechanical Engineer Vital Lyfe is a tech company redefining water autonomy through innovation, creating a new category of personal water making technology built to scale where infrastructure can't. Own and build the core mechanical systems behind our product; pumps... 
    Senior
    Remote work

    Vital Lyfe

    Los Angeles, CA
    4 days ago
  • $194.9k - $310.86k

    We are seeking a Senior Vice President, Mechanical Engineering to lead the growth and delivery of our Mechanical Engineering practice in Los Angeles, with a strong focus on Healthcare, Commercial, Higher Education, and Civic market sectors. This leadership role presents... 
    Senior
    Contract work
    For contractors
    Local area
    Flexible hours

    WSP Group

    Los Angeles, CA
    3 days ago
  • $145k - $190k

     ...Senior Mechanical Engineer Hybrid • Los Angeles, CA 90045 Overview Salary Range $145,000.00 - $190,000.00 Salary Level Experienced Position Type Full Time Description We are looking for a Senior Mechanical Engineer to join TLC Engineering Solutions (TLC... 
    Senior
    Full time
    Contract work
    Local area
    Work from home
    Flexible hours

    TLC Engineering for Architecture

    Los Angeles, CA
    19 hours ago
  •  ...Senior Mechanical Engineer The Senior Mechanical Engineer will assist the Director of Engineering in planning, organizing, supervising, and performing professional mechanical/HVAC (mechanical) engineering work for the campus physical plant planning and construction... 
    Senior
    Work at office

    UCLA

    Los Angeles, CA
    19 hours ago
  • $100k - $125k

     ...Sr. Mechanical Engineer Motivo is a project-based company delivering excellence in mechanical and electrical system design and prototype builds. We have a history in successfully taking concepts through to actual finished solutions. Our work spans a wide range of market... 
    Senior
    Flexible hours

    Motivo

    Compton, CA
    2 days ago
  • $146.4k - $219.6k

     ...Posted Wednesday August 19th, 2026 at 9:46 AM | Expires Thursday, December 31st, 2026 at 12:59 AM Position Summary: A Senior Mechanical Engineer in our Mission Critical practice will have the opportunity to design the most complex advanced building systems, prepares... 
    Senior
    For contractors
    Casual work
    Work at office
    Flexible hours

    Henderson Engineers

    Los Angeles, CA
    3 days ago
  •  ...join us on our mission of providing humankind access to the galaxy beyond our planet. About the RoleApex is seeking a Senior Mechanical Design Engineer to join our satellite engineering team. In this role, you’ll own the design, analysis, and development of critical mechanical... 
    Senior
    Full time
    Work at office

    Apex Technology

    Los Angeles, CA
    3 days ago
  • $137k - $193k

     ...Senior Mechanical Design EngineerPlaya Vista, California, United StatesTurning Space into a Transportation Layer for EarthWho We Are:Inversion...  ...and logistics.What You'll Do:As a Senior Mechanical Design Engineer at Inversion, you will play a critical role in the design,... 
    Senior
    Permanent employment

    Inversion Space

    Playa Vista, CA
    2 days ago
  •  ...thinking to solve this problem for the US and its allies. About the Team Vehicle Engineering owns the missile as a physical object from design through flight: structures, mechanical integration of the full subsystem stack, and the build. About the Role You... 
    Senior
    Remote work
    Weekend work

    Furientis

    Los Angeles, CA
    4 days ago
  • $140k - $200k

     ...Senior Mechanical Design Engineer Critical Energy is an innovative, early-stage, venture-backed cleantech company on a mission to accelerate the global energy transition through abundant, low-cost clean energy. Founded by an ex-SpaceX engineer, Critical Energy designs... 
    Senior
    Immediate start

    Critical Energy Services Inc

    Hawthorne, CA
    4 days ago
  • $100k - $140k

     ...Senior Mechanical Engineer Build the Future of High-Performance Connectivity At ThinKom, we don't just build antennas - we design high-performance, next-generation mechanical systems that connect the world across air, land, sea, and space. From Inflight Connectivity... 
    Senior
    Permanent employment
    Work at office

    ThinKom Solutions Inc

    Hawthorne, CA
    3 days ago
  • $140k - $180k

     ...Senior Mechanical Engineer Gardena, CA Mesh Optical Technologies was founded on the belief that optical photons will be at the center of advanced technologies in the coming century. Making advanced technology ubiquitous means building at scale, and that's exactly... 
    Senior
    Relocation package
    Flexible hours
    Weekend work

    Mesh Optical Technologies

    Gardena, CA
    4 days ago
  • $160k - $200k

     ...Senior Mechanical Engineer Vanderweil Engineers is a top ranked national full-service engineering firm specializing in MEP/FP, and technology services. Working in multiple sectors including Mission Critical Data Centers, Science & Technology, Academic, Healthcare,... 
    Senior
    For contractors
    Work at office
    Flexible hours

    Vanderweil Engineers

    Los Angeles, CA
    4 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Mechanical Engineer. Be the first to apply!