Mechanical Engineer (Mid-Senior)

The Design & Engineering Division within the Project Management Office (PMO) is seeking a midsenior Mechanical Engineer. You will provide engineering design solutions for the Laboratorys mechanical infrastructure building HVAC systems building automation and DDC control systems energy management laboratory design and central planttype equipment in support of projects associated with new construction remodeling and modifications to conventional office and laboratory facilities.

The Project Management Office (PMO) provides LLNL with engineering design estimating construction and project management services. PMO provides infrastructure services to enable cuttingedge research and development in the areas of defense technologies global security laser science bioscience and more. PMO offers cradle to grave infrastructure services to achieve reliable delivery of completed projects with priority on safety collaboration and a workforce working toward our shared vision.

• Mechanical Infrastructure Design and Engineering: Perform independent operational and technical tasks related to the mechanical engineering planning design and construction of LLNLs facilities and infrastructure including duct and pipe sizing HVAC load calculations and system modeling. Prepare construction drawings using Revit and AutoCAD.
• Technical Analysis and Energy Management: Provide engineering analysis and solutions to a diverse range of complex site building mechanical issues and/or problems. Conduct computerbased analyses for heating/cooling load calculations energy management and lifecycle cost optimization to ensure efficient and sustainable designs.
• Construction Documentation and Procurement: Prepare detailed construction documents including mechanical engineering drawings specifications scoping criteria and procurement specifications for LLNLfurnished equipment and materials.
• Construction Support and Field Engineering: Provide engineering support during construction by reviewing submittals shop drawings change order requests resolving field issues and performing field observations to ensure compliance with project requirements.
• Problem Solving and Technical Solutions: Develop and implement engineering solutions to moderately complex mechanical system issues using independent judgment and analysis to address projectspecific challenges.
• Vendor Coordination and Component Selection: Partner with mechanical supply vendors to select specify and procure mechanical components ensuring compatibility with design requirements and project objectives.
• Project Leadership and Oversight: Lead multiple complex mechanical projects with responsibility for the development of budgets schedules deliverables and compliance with technical criteria while directing the work of drafters.
• Perform other duties as assigned.

Additional job responsibilities at the TSS.4 level

• Provide direction in designing complex building and laboratory mechanical systems for new construction and the renovation and remodeling of existing facilities. This includes the design of heating ventilation and air conditioning systems.
• Prepare designs and engineering studies for conventional mechanical equipment and components in complex building environments supporting highly advanced research activities. Projects include:  Design for the installation of air handling equipment fume hoods boilers chillers DDC control systems pumps and filter systems as well as complex mechanical systems in specialized research facilities such as clean rooms high performance computing facilities biosafety labs semiconductor and electronics fabrication labs nonreactor nuclear facilities and laser research facilities.
• Prepare construction documents for designs including construction drawings construction specifications and procurement specifications for the prepurchase of LLNL furnished equipment. Use independent judgement to ensure construction documents that have been prepared by both internal staff and external A/E firms are in conformance with applicable Building Codes and LLNL Standards.
• Prepare procurement documents for the subcontracting of outside consultant Architectural/Engineering (A/E) services to supplement internal engineering capability; manage/direct the outside A/E contracts including preparing project scopes technical criteria engineering design estimates and schedules.

Qualifications :

• Ability to secure and maintain a U.S. DOE Qlevel security clearance which requires U.S. citizenship.
• Bachelors degree in mechanical engineering or an equivalent combination of education and at least ten years of mechanical engineering design experience in an architectural/engineering (A/E) consulting firm.
• Professional registration as a Mechanical Engineer in the state of California or reciprocity from another state or ability to obtain a California license within 24 months.
• Experience in and knowledge of the professional practice of commercial industrial and laboratory facility mechanical engineering and construction in areas such as HVAC systems design piping system analysis and pump selection building automation and control systems and LEED/sustainable design practices.
• Technical analytical and decisionmaking skills with the ability to organize and effectively coordinate multiple and frequently conflicting concurrent tasks with accurate followthrough.
• Experience with mechanical engineering design software for building modeling such as heat load and psychometric analysis HVAC system modeling energy management and/or pipe flow analysis experience with Microsoft Office software and Revit and AutoCAD for the preparation of working drawings.
• Advanced verbal and written communication skills necessary to effectively collaborate in a team environment and present and explain technical information.

Additional Qualifications at the TSS.4 Level

• Significant experience and advanced knowledge of the professional practice of commercial industrial and laboratory facility mechanical engineering and construction in areas such as HVAC systems design piping system analysis and pump selection building automation and control systems and LEED/sustainable design.
• Advanced knowledge of applicable state and national construction codes and standards including California Mechanical & Plumbing Codes NFPA 1 NFPA 13 and other Fire Codes and Standards AWWA Standards and ASHRAE Standards such as 62.1 and 90.1.
• Significant experience in design management including project planning scheduling professional services estimates and adherence to completion dates.

Qualifications we desire

• Membership in professional organizations such as ASHRAE ASME etc.
• USGBC LEED AP certification and knowledge of applicable DOE Orders Federal Standards.
• Experience in plumbing design and the design of industrial gas systems and process piping systems.
• Experience in design of fire protection systems and with mechanical system testing and balancing and/or commissioning.

Additional Information :

#LIHybrid

Position Information

This is a Career Indefinite position open to Lab employees and external candidates.

Why Lawrence Livermore National Laboratory

• Included in 2025 Best Places to Work by Glassdoor!
• Flexible Benefits Package
• 401(k)
• Relocation Assistance
• Education Reimbursement Program
• Flexible schedules (*depending on project needs)
• Our values visit  Clearance

  This position requires a Department of Energy (DOE) Qlevel clearance.  If you are selected we will initiate a Federal background investigation to determine if you meet eligibility requirements for access to classified information or matter. Also all L or Q cleared employees are subject to random drug testing.  Qlevel clearance requires U.S. citizenship. 

  PreEmployment Drug Test

  External applicant(s) selected for this position must pass a postoffer preemployment drug test. This includes testing for use of marijuana as Federal Law applies to us as a Federal Contractor.

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  Per the Department of Energy (DOE) Lawrence Livermore National Laboratory must meet certain restrictions with the use and/or possession of mobile devices in Limited Areas. Depending on your job duties you may be required to work in a Limited Area where you are not permitted to have a personal and/or laboratory mobile device in your possession.  This includes but not limited to cell phones tablets fitness devices wireless headphones and other Bluetooth/wireless enabled devices.  

  If you use a medical device which pairs with a mobile device you must still follow the rules concerning the mobile device in individual sections within Limited Areas.  Sensitive Compartmented Information Facilities require separate approval. Hearing aids without wireless capabilities or wireless that has been disabled are allowed in Limited Areas Secure Space and Transit/Buffer Space within buildings.

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  Remote Work :

  No

  
  

  Employment Type :

  Fulltime