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GILLIG LLC

Full-time|$75K/yr - $130K/yr|On-site|Livermore, CA

About GILLIG LLC GILLIG LLC designs and manufactures transit buses in Livermore, CA, serving communities across the United States. The company is known for its focus on environmental sustainability and social responsibility, with a strong reputation for quality, reliability, and service. All GILLIG buses are designed and built in-house, supporting the shift …

Apr 17, 2026

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Mechanical Engineering Lead

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

Role overview The Mechanical Engineering Lead at Lawrence Livermore National Laboratory guides a team of engineers working on the design, development, and implementation of advanced mechanical systems. This position is based in Livermore and plays a key part in ensuring projects meet strict performance and safety standards while supporting important research initiatives. What you will do Lead and mentor a group of mechanical engineers throughout project lifecycles. Oversee the design and execution of mechanical systems for complex applications. Manage projects from initial concept through to final delivery. Verify that all engineering solutions comply with safety and performance requirements. Contribute technical expertise and project leadership to support ongoing research efforts. Requirements This role requires experience in leading engineering teams, a strong background in mechanical system design, and a commitment to upholding safety and performance standards on critical projects. Working at Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory is known for its work in science, engineering, and national security. Mechanical engineers here contribute to technology advancements and support research that has a broad impact.

Apr 23, 2026

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Optical - Mechanical Engineers

Inertia

Full-time|$120K/yr - $225K/yr|On-site|Livermore

Overview:Join Inertia as we seek talented Optical - Mechanical Engineers dedicated to enhancing the design and testing capabilities of high-power laser systems for our pioneering fusion energy program. Our goal is to develop the world's highest average power pulsed lasers, which will serve as the 'unit cell' of our future power plant. Collaborating with industry leaders, government entities, and academic institutions, we aim to construct a demonstrator beamline that achieves 10 kJ at 10 Hz with a 10% wall-plug efficiency, utilizing cutting-edge diode-pumped solid-state laser technology (DPSSL).Initially, you will be responsible for creating test stands for various system components, including optical and thermal evaluations of the amplifier, testing pulsed semiconductor laser diode arrays, assessing high damage threshold optics, and developing manufacturing methods for a diverse array of optical components.Primary Responsibilities:Your role will encompass some or all of the following:Design innovative, highly stable opto-mechanical systems for advanced high-power, high-energy laser systems.Conduct comprehensive opto-mechanical analyses to enhance pointing stability, mitigate thermal drift, and address mounting stresses.Implement heat flow, stress, and birefringence analyses using finite element analysis (FEA) and computational fluid dynamics (CFD) tools such as COMSOL and Abaqus.Generate detailed drawings with SolidWorks to facilitate the development and procurement of optical and mechanical components.Devise test plans for thorough evaluation of your designs.Collaborate with optical and systems engineering teams to deliver cohesive, integrated designs.Qualifications:Bachelor's or Master's degree in Mechanical Engineering, Optical Engineering, or a related discipline.Proven design experience with precision opto-mechanical products.Expertise in CAD and design-for-manufacturing methodologies.Practical experimental and prototyping skills.Salary & Benefits:The salary range for this position is $120,000 - $225,000. Actual compensation will be determined based on skills, experience, and education.We offer competitive compensation along with an exceptional benefits package, which includes medical, dental, and vision plans, company-paid holidays, a matching 401(k) plan, and more!

Nov 5, 2025

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Senior Mechanical Design Engineer

inertia

Full-time|On-site|Livermore

Join inertia as a Senior Mechanical Design Engineer and be a pivotal part of our innovative team. In this role, you will leverage your expertise in mechanical design to develop cutting-edge solutions for our projects. You will work closely with cross-functional teams to ensure the successful execution of design processes, from concept to production.

Mar 13, 2026

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Mechanical Engineer - Target Fabrication

Inertia

Full-time|$105K/yr - $200K/yr|On-site|Livermore

Overview:Inertia is on the lookout for talented Mechanical Engineers passionate about revolutionizing target fabrication for our cutting-edge fusion program. This role entails the design and optimization of precise assembly, bonding, and alignment processes for high-strength target components.Primary Responsibilities:Design and engineer tooling and fixtures aimed at precision target fabrication and assembly.Collaborate closely with materials scientists and process engineers to enhance target integrity and production efficiency.Conduct mechanical testing and reliability evaluations of bonding and assembly techniques.Assist in the development of automation systems for the mass production of fusion targets.Engage with vendors, external partners, and internal stakeholders to qualify materials and components.

Oct 27, 2025

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Mechanical Technologist/Senior Mechanical Technologist

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

We are seeking talented Mechanical Technologists and Senior Mechanical Technologists to join our team at Lawrence Livermore National Laboratory. In these roles, you will play a vital part in supporting ongoing programmatic activities, collaborating with engineers, scientists, and technical staff. Your responsibilities will encompass the design of fixtures and assemblies, setting up and maintaining vacuum systems, operating and troubleshooting equipment, modifying hardware, and engaging in basic fabrication using standard tools and equipment. You will also work with various testing equipment, including digital voltmeters and oscilloscopes. These positions are located within the Materials and Non-Destructive Evaluation (MNDE) Section of the Materials Engineering Division (MED).Note: This role requires full-time, on-site presence due to the nature of the work.The positions will be filled at either level based on the applicant's knowledge and experience, as assessed by the hiring team. Additional responsibilities will be assigned if hired at the Senior level.Your key responsibilities will include:Delivering technical support by applying your fundamental knowledge of fabrication, assembly, installation, and system operation under general supervision.Fabricating and assembling or disassembling mechanical components and systems while adhering to established procedures.Meeting and maintaining qualification criteria in a technical or engineering discipline for programmatic operations and maintenance.Utilizing moderately complex mathematics and geometric concepts to create shop-level drawings for the fabrication of test hardware.Operating machine shop and hand tools to fabricate tooling in support of programmatic experiments.Applying general knowledge of relevant technologies and processes to troubleshoot hardware or system malfunctions.Documenting systems and maintaining experimental records.Performing general facility-related and technical functions, including maintenance, testing, and equipment upgrades.Adhering to written operational and safety procedures, maintaining good housekeeping in experimental, work, and office areas, and performing all tasks in compliance with ES&H, security, and business practice requirements.Carrying out other duties as assigned.At the Senior level (533.3), additional responsibilities will include:Providing advanced technical support for designing and fabricating materials and operations for complex systems with minimal supervision.Engaging in regular, independent interactions with project leaders, scientists, engineers, and technical personnel to evaluate and analyze requirements and processes.Setting priorities and schedules for advanced projects.

Feb 17, 2026

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Mechanical Engineer - Body & HVAC

GILLIG LLC

Full-time|$75K/yr - $130K/yr|On-site|Livermore, CA

Location: Livermore, CA About GILLIG GILLIG LLC is a leading manufacturer of transit buses in the United States. Our buses help drive environmental and social progress in communities nationwide. We design and build every GILLIG bus at our Livermore, California facility, from concept through final assembly. As the industry moves toward zero-emission vehicles, GILLIG continues to earn recognition for quality, reliability, durability, and customer support. Why Join GILLIG? Work with a team advancing sustainable mobility through battery electric, hybrid electric, near-zero CNG, and clean diesel buses. Inclusive, family-oriented workplace culture. Over 132 years of history and stability in the Bay Area. Flexible scheduling options, depending on project needs. Competitive pay, company-paid medical premiums, a strong retirement plan, and comprehensive benefits. Engineering at GILLIG The Engineering department develops, customizes, and configures clean technology heavy-duty transit buses. Our work connects communities, eases congestion, and supports sustainability. Engineers at GILLIG contribute to design, analysis, testing, launch, and troubleshooting across a range of technical areas. The Mechanical Engineering team handles the design, development, and optimization of mechanical systems and components. This includes chassis, HVAC systems, interior layouts, and powertrain integration. The team focuses on safety, durability, and performance, and works closely with other departments to meet regulatory standards, address production challenges, and deliver cost-effective solutions for heavy-duty transit buses. Role Overview: Mechanical Engineer – Body & HVAC This Mechanical Engineer position supports senior engineers in the design and industrialization of components for GILLIG’s evolving product line. The role offers a chance to influence vehicle, system, and component design decisions while working alongside experienced engineers. Key responsibilities include: Assisting with transit bus design projects. Supporting the development of components and systems, with a focus on body and HVAC. Helping to resolve technical challenges as they arise. Contributing to innovative design solutions for GILLIG buses.

Apr 17, 2026

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Mechanical Engineer - Optomechanical Systems

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

Lawrence Livermore National Laboratory is hiring a Mechanical Engineer to work on optomechanical systems. This role contributes to advanced engineering projects that support the lab's research and technology initiatives. Key responsibilities Design and analyze optomechanical components and assemblies for a range of research projects. Collaborate with engineers and scientists from different disciplines to develop systems. Apply technical expertise to projects that advance laboratory research objectives. Location This position is based in Livermore, California.

Apr 20, 2026

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Mechanical Technologist/Sr. Mechanical Technologist - Nuclear Materials Engineering

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

Join our innovative team at Lawrence Livermore National Laboratory as a Mechanical Technologist/Sr. Mechanical Technologist specializing in Nuclear Materials Engineering. This dynamic role involves utilizing your mechanical engineering expertise to contribute to critical projects that support national security and scientific advancement. You will collaborate with a skilled team to develop and implement engineering solutions, ensuring that our nuclear materials programs are efficient, safe, and compliant with regulatory standards.

Mar 17, 2026

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Mechanical Engineer – Powertrain & Structures

GILLIG LLC

Full-time|$75K/yr - $130K/yr|On-site|Livermore, CA

Location: Livermore, CA About GILLIG GILLIG LLC manufactures transit buses in the United States, with every vehicle designed and built in Livermore, CA. The company focuses on quality, reliability, and durability, supporting the shift toward zero-emission vehicles and sustainable mobility. GILLIG’s buses serve communities across the nation, helping reduce congestion and promote greener transportation. Why Join GILLIG Leader in sustainable mobility, offering battery electric, hybrid electric, near-zero CNG, and clean diesel transit buses Inclusive, family-oriented company culture Stable, growing organization with over 132 years in the Bay Area Flexible work schedules based on project needs Competitive compensation, company-paid medical premiums, a generous retirement plan, and comprehensive benefits Engineering at GILLIG The engineering team develops and customizes clean technology heavy-duty transit buses. Engineers work across design, analysis, testing, launch, and troubleshooting, collaborating with cross-functional teams to deliver reliable vehicles that meet high standards and regulatory requirements. Mechanical Engineering Focus The Mechanical Engineering department designs and optimizes mechanical systems and components such as chassis, HVAC, interior layouts, and powertrain integration. The team works to ensure safety, durability, and performance, while troubleshooting production issues and delivering cost-effective solutions for heavy-duty transit buses. Role Overview: Mechanical Engineer – Powertrain & Structures This Mechanical Engineer position supports senior engineers in the design and industrialization of components for GILLIG’s evolving product line. The role involves contributing to design decisions at the vehicle, system, and component levels. Key responsibilities include: Providing engineering assistance throughout the design process Resolving technical issues as they arise Supporting the development of innovative design solutions for powertrain and structural components Mechanical Engineers at GILLIG collaborate closely with other teams to ensure every bus meets performance and safety standards.

Apr 16, 2026

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Mechanical Engineer - Production Liaison

GILLIG LLC

Full-time|$75K/yr - $130K/yr|On-site|Livermore, CA

GILLIG LLC designs and manufactures transit buses at its Livermore, CA facility, building each vehicle from initial concept through final assembly. The company is recognized for its commitment to quality, reliability, and service, and is a leader in advancing zero-emission vehicles for sustainable mobility in the U.S. market. The Mechanical Engineer - Production Liaison works within the Liaison Engineering team, which bridges the gap between design and manufacturing. This group ensures that new and existing bus designs move smoothly into and through production, supporting both ongoing product lines and the introduction of new models. Team members include mechanical, electrical, vehicle controls, and industrial engineers, as well as production support technicians. Role overview This position provides hands-on technical support to engineers and technicians who assemble GILLIG’s heavy-duty transit buses. The Mechanical Engineer focuses on optimizing mechanical components and improving production processes. The work directly impacts the efficiency of assembly and the quality and reliability of the finished buses. What you will do Support the assembly of transit buses by addressing technical challenges on the production floor Work to optimize components and streamline manufacturing processes Collaborate with design and production teams to ensure efficient introduction of new designs Contribute to continuous improvement efforts that enhance product quality and reliability Why GILLIG Develops battery electric, hybrid electric, near-zero CNG, and clean diesel buses for sustainable transit Inclusive, family-oriented workplace culture Over 132 years serving the Bay Area, with steady growth Flexible work schedules based on project needs Competitive pay, fully paid medical premiums, strong retirement plan, and comprehensive benefits

Apr 22, 2026

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Mechanical/Electro-Mechanical Design Drafter/Designer

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

We are looking for enthusiastic Mechanical and/or Electro-Mechanical Design Drafters or Designers to join our team at Lawrence Livermore National Laboratory (LLNL) in Livermore, CA. This role is crucial in supporting both new and ongoing experiments and facilities across various programs at LLNL’s Site 200. You will engage in design and drafting tasks that encompass electronic and mechanical design, as well as the management of drawings and data for intricate control and diagnostic systems and subsystems. Your contributions will be pivotal to selected programs focused on Modernization, Modification, or Stockpile Systems, operating within the Defense Technologies Engineering Division (DTED) and the Weapon Technologies and Engineering (WTE) Program, under the Strategic Deterrence (SD) directorate.This position necessitates full-time, on-site presence due to the specialized nature of the work involved.We have openings at various experience levels, determined by your knowledge and related experience as assessed by our hiring team. Additional responsibilities (as detailed below) may be assigned if you are hired at a higher level.Your Responsibilities:Deliver mechanical or electro-mechanical drafting and design support to lead designers, engineering teams, and scientific staff, utilizing CAD tools where design parameters and specifications are defined.Conduct basic calculations to aid technical tasks using established engineering formulas.Utilize database management software to process drawings and technical information.Maintain comprehensive systems documentation and experimental records.Produce graphics and technical materials to support design reviews, procedures, and other documentation.Review completed drawings for compliance with LLNL drafting standards and specifications.Perform additional duties as required.Additional Responsibilities at the 534.3 Level:Provide advanced mechanical or electro-mechanical design and drafting support where overall design parameters and specifications have been established.Contribute to preliminary design concepts for hardware, components, and systems, making independent judgments and decisions.Estimate schedules and costs to determine effective methods in design, materials, and time to meet project deliverables, and prepare and present technical materials for design reviews, procedures, and related documentation.

Mar 10, 2026

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Senior Mechanical Project Engineer - Nuclear Facility

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

The Senior Mechanical Project Engineer will take a lead role in managing complex engineering projects within the Nuclear Facility at Lawrence Livermore National Laboratory in Livermore. This position centers on guiding projects from initial concept through to completion, with a focus on mechanical systems that meet rigorous safety and performance standards. Role overview This role involves close collaboration with cross-functional teams to design, develop, and implement mechanical solutions. The work supports the Laboratory’s mission in national security and scientific research, requiring both technical depth and strong project management skills. What you will do Lead and manage mechanical engineering projects, overseeing all phases from planning to execution. Work with multidisciplinary teams to deliver systems that comply with strict safety and performance criteria. Apply advanced mechanical engineering principles to solve technical challenges in a nuclear facility setting. Requirements Extensive experience in mechanical engineering and project management. Demonstrated ability to lead complex technical projects. Strong collaboration and communication skills for working with diverse teams.

Apr 29, 2026

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Senior Mechanical Engineer - Security Clearance Required

Lawrence Livermore National Laboratory

Full-time|Hybrid|Livermore

Join our team at Lawrence Livermore National Laboratory (LLNL) as a Senior Mechanical Engineer. We are seeking talented individuals to contribute to both new and ongoing projects that are critical to national security. You will play a vital role in providing nuclear weapon engineering design expertise, systems engineering, experimental device design, fabrication and assembly, and much more.Your work will involve collaboration with colleagues from various National Laboratories, Production Agencies, the National Nuclear Security Administration (NNSA), and the Department of Defense (DoD).Positions are available within the Defense Technologies Engineering Division (DTED), where we support Strategic Deterrence Programs. Depending on your assignment, this role may offer a hybrid schedule, allowing you to blend in-person work with remote flexibility.These positions can be filled at different levels based on your expertise and experience, and additional responsibilities will be assigned if you are hired at a higher level.Your Responsibilities:Provide technical expertise in mechanical and electromechanical design.Conduct research on structural, thermal, hydraulic, or dynamics modeling of mechanical systems.Create advanced conceptual and detailed designs in support of ongoing projects.Prepare health and safety documentation in line with Integrated Safety Management (ISM) requirements and engage in design and Management Prestart Reviews.Coordinate project interfaces and collaborate with both internal and external organizations.Lead and offer guidance to multidisciplinary project teams within a dynamic environment.Perform other duties as assigned.Additional Responsibilities for SES.4 Level:Establish project vision and strategy, influencing the technical direction for yourself and others.Provide expert capability in complex mechanical design and analysis.

Mar 3, 2026

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Mechanical - Structural Analyst

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

Join our dynamic team at Lawrence Livermore National Laboratory (LLNL) as a Mechanical - Structural Analyst. In this exciting role, you will contribute to innovative projects by applying your analytical skills to assess mechanical and structural systems. This position is ideal for recent graduates looking to launch their careers in engineering and contribute to cutting-edge research.

Jan 22, 2026

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Senior Mechanical Engineering Analyst at Lawrence Livermore National Laboratory | Livermore

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

Join the dynamic team at Lawrence Livermore National Laboratory (LLNL) as a Senior Mechanical Engineering Analyst. In this pivotal role, you will leverage your expertise to support advanced mechanical engineering projects that contribute to national security and scientific discovery.

May 1, 2026

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Mechanical Properties Technologist

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

Join Lawrence Livermore National Laboratory as a Mechanical Properties Technologist. In this role, you will be pivotal in analyzing and interpreting the mechanical properties of materials, contributing to various scientific and engineering projects that support national security.

Mar 17, 2026

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Mechanical Engineer - Thermal and Structural Analysis at Inertia | Livermore

Inertia Enterprises

Full-time|$125K/yr - $225K/yr|On-site|Livermore

OverviewInertia Enterprises is at the forefront of innovative technology, developing the first fusion energy power plant in the world. Located in a state-of-the-art 48,000 sq.ft. facility in Livermore, CA, we are looking for a Mechanical Engineer specializing in Thermal and Structural Analysis. This pivotal role involves spearheading the analysis and supporting the mechanical design of essential components and structures for our integrated power plant.In this position, you will engage in designing and analyzing components and structures that must endure the most extreme engineering conditions—intense x-ray and neutron flux, high temperatures, severe thermal gradients, high pressures, and powerful laser beams, among others. Your expertise will be crucial in analyzing our fusion engine structures, including the first wall and breeding blanket structures, while also supporting the design and fabrication of high-power laser delivery components and fusion target materials.Primary ResponsibilitiesLead the mechanical design and 3D modeling of key fusion engine systems, structures, and components, including the chamber, first wall, blanket, vacuum chamber, and piping.Direct thermal-structural analysis of critical components such as the engine first wall and tritium breeding blanket under both steady-state and transient conditions. Focus on optimizing structures for effective heat removal, thermal longevity, and manufacturability.Assess the impact of cyclic heat flux, creep loading, and fatigue loading on chamber components using relevant models and standards to predict the operational lifespan of the fusion core. Account for irradiation effects in thermal mechanical analyses.Perform thermal and structural analyses and parametric studies to validate and refine material selections and mechanical designs, documenting insights and results in technical reports.Actively engage in design reviews and risk assessment, identifying technical gaps, tracking action items, and integrating feedback from stakeholders into the design process.Conduct finite element analysis and thermal-mechanical analysis on additional key structures and components, including stress analysis of helium-cooled high-power laser optics and thermal stability of fusion target sub-structures.

Feb 19, 2026

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Senior Mechanical Technician in a Dynamic Startup Environment

inertia

Full-time|$90K/yr - $100K/yr|On-site|Livermore

Overview:Join our innovative team at inertia, where we are on the forefront of advanced precision mechanical design and system integration. We are looking for a talented Senior Mechanical Technician who thrives in a fast-paced startup environment. This position is perfect for a proactive problem solver who can take initiative, manage multiple tasks, and develop creative technical solutions without requiring step-by-step guidance.Key Responsibilities:Conceptualize and construct mechanical components and assemblies from initial design to prototype.Create, update, and oversee mechanical drawings and documentation to ensure accuracy.Fabricate parts utilizing shop tools, machining techniques, and rapid prototyping methods.Integrate basic electronics and electromechanical systems within mechanical designs.Troubleshoot prototypes efficiently and iterate designs based on feedback.Manage multiple projects and adapt to changing priorities typical of a startup.Develop imaginative and practical solutions to complex technical challenges.Communicate effectively with engineers, founders, and team members to ensure clarity and collaboration.Document design processes, changes, and build operations for team reference.Qualifications:Proven experience as a mechanical technician or in a comparable hands-on role.Strong skills in mechanical design and drafting.Demonstrated experience in fabrication, including machining, soldering, working with pressure systems, and equipment maintenance.Basic understanding of electronics and system integration.Ability to work independently with minimal oversight.Flexibility to switch tasks and take on various roles as required.A strong problem-solving mindset and a commitment to continuous improvement.Excellent communication skills with a focus on thorough documentation.Preferred Qualifications:Experience with CAD software (SolidWorks, Fusion 360, AutoCAD, etc.).Background in prototyping, research and development, or product testing.

Feb 27, 2026

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Heavy Equipment Mechanic

Lawrence Livermore National Laboratory

Full-time|On-site|Livermore

Join our dynamic team at Lawrence Livermore National Laboratory as a Heavy Equipment Mechanic. In this pivotal role, you will be responsible for maintaining and repairing a diverse range of heavy machinery and equipment. Your expertise will ensure that our operations run smoothly and efficiently. We are looking for a motivated individual who thrives in a team-oriented environment and possesses a strong work ethic.

Mar 12, 2026

Optical - Mechanical Engineers

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