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Assembly Line Jobs in California (NOW HIRING)

Rieke Packaging Systems

Assembly Lead

El Cajon, CA

This occupation requires the running of assembly related equipment: squeezers (squeezer press, hand squeezer), pop rivet guns, torque wrenches etc. This position requires moderate physical exertion ...

TriMas Corporation

Assembly Lead

El Cajon, CA · On-site

This occupation requires the running of assembly related equipment: squeezers (squeezer press, hand squeezer), pop rivet guns, torque wrenches etc. This position requires moderate physical exertion ...

TriMas Corporation

Assembly Lead

El Cajon, CA · On-site

$20 - $22/hr

Assembly Lead Company: TriMas Company LLC Primary Location: 1451 N Johnson Ave, El Cajon, CA 92020 USA Workplace Type: On-site Employment Type: Hourly Full-Time Function: Manufacturing Production ...

3 Stonedeggs Inc

Be Seen First

Food Preparation & Assembly - Sack Lunches

West Sacramento, CA · On-site

$18 - $19/hr

Assembly Line Setup & Operation: Set up workstations with pre-portioned ingredients, packaging supplies, and labels according to daily production targets and assembly guidelines. * Food Packaging ...

3 Stonedeggs Inc

Be Seen First

Food Preparation & Assembly - Sack Lunches

West Sacramento, CA · On-site

$18 - $19/hr

Assembly Line Setup & Operation: Set up workstations with pre-portioned ingredients, packaging supplies, and labels according to daily production targets and assembly guidelines. * Food Packaging ...

Aerotek

Assembler Technician

Poway, CA

$20/hr

Assembler Technician We are seeking an Assembler Technician with a minimum of 1 year of related experience in a manufacturing or assembly line environment. This role requires strong attention to ...

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All JobsAssembly Line JobsAssembly Line Jobs in California

Assembly Line information

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How much do assembly line jobs pay per hour?

As of Aug 9, 2026, the average hourly pay for assembly line in California is $15.41, according to ZipRecruiter salary data. Most workers in this role earn between $13.75 and $17.07 per hour, depending on experience, location, and employer.

Do assembly line jobs still exist?

Yes, assembly line jobs still exist and are common in manufacturing industries such as automotive, electronics, and consumer goods. These roles typically involve operating machinery, assembling products, and following safety protocols, often requiring skills in machinery operation and quality control.

What are some common challenges faced by assembly line workers, and how can they be managed?

Assembly line workers often face challenges such as repetitive motion, maintaining high levels of focus, and meeting production quotas under time constraints. To manage these, many employers provide ergonomic equipment, regular breaks, and safety training. Workers can also benefit from developing strong communication skills to coordinate with team members and supervisors. Staying proactive about personal health and communicating any concerns early helps ensure a safer and more efficient work environment.

What is the difference between Assembly Line vs Machine Operator?

AspectAssembly LineMachine Operator
Required CredentialsHigh school diploma or equivalent; training providedHigh school diploma; technical training or certification often preferred
Work EnvironmentFactories, manufacturing plants, assembly stationsFactories, manufacturing plants, equipment-focused settings
Industry UsageManufacturing, automotive, electronicsManufacturing, machinery, electronics
Job FocusAssembling products on a production lineOperating and maintaining machinery

Assembly Line workers focus on assembling products along a production line, while Machine Operators specialize in operating and maintaining specific machinery. Both roles are essential in manufacturing environments and often require similar certifications and work settings, but their job functions differ significantly.

What are the key skills and qualifications needed to thrive as an assembly line worker?

To thrive as an Assembly Line Worker, you need manual dexterity, attention to detail, the ability to follow instructions, and typically a high school diploma or equivalent. Familiarity with manufacturing equipment, safety protocols, and sometimes experience with automated assembly systems are important technical qualifications. Strong teamwork, reliability, and a focus on quality help individuals excel in this role. These skills ensure efficient production, minimize errors, and maintain workplace safety in a fast-paced manufacturing environment.

What are the duties of an assembly line worker?

An assembly line worker is responsible for assembling products or components according to specifications, operating machinery, and ensuring quality standards are met. They often work in a fast-paced environment, following safety protocols and using tools or equipment to complete tasks efficiently.

What does an assembly line worker do?

Assembly line workers are employees who perform specific tasks in the manufacturing process, often as part of a team. Their main responsibility is to assemble parts or products in a sequential manner, following strict quality and safety standards. They may operate machinery, use hand tools, and inspect components for defects. Assembly line work typically requires attention to detail, manual dexterity, and the ability to work efficiently under time constraints. These workers are essential for mass production in industries such as automotive, electronics, and consumer goods.

What are assembly line jobs?

Assembly line jobs involve workers performing specific tasks in a manufacturing process, often on a conveyor belt or workstation, to assemble products efficiently. These roles typically require attention to detail, manual dexterity, and sometimes the use of tools or machinery, with shifts that can be long and repetitive.
What are the most commonly searched types of Assembly Line jobs in California? The most popular types of Assembly Line jobs in California are:
What are popular job titles related to Assembly Line jobs in California? For Assembly Line jobs in California, the most frequently searched job titles are:
What job categories do people searching Assembly Line jobs in California look for? The top searched job categories for Assembly Line jobs in California are:
What cities in California are hiring for Assembly Line jobs? Cities in California with the most Assembly Line job openings:
Assembly Line jobs near you
Infographic showing various Assembly Line job openings in California as of August 2026, with employment types broken down into 1% As Needed, 71% Full Time, 22% Part Time, 2% Temporary, 3% Contract, and 1% Nights. Highlights an 93% Physical, 3% Hybrid, and 4% Remote job distribution, with an average salary of $32,044 per year, or $15.4 per hour.

Manufacturing Engineer, Battery Assembly

Hadrian Automation, Inc

Los Angeles, CA • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 11 days ago

Job description

Hadrian - Manufacturing the Future
Hadrian is building autonomous factories to reindustrialize America. By combining AI, advanced software, robotics, and full-stack manufacturing, we help aerospace and defense companies build rockets, satellites, aircraft, ships, and other mission-critical systems up to 10x faster and at significantly lower cost.
Following our $1.37B Series D at a $7.87B valuation, Hadrian is rapidly expanding our manufacturing footprint, launching new capabilities across welding, casting, forging, electronics, additive manufacturing, and more, while scaling our Factory-as-a-Service platform to transform how critical products are built.
Backed by leading investors including JPMorgan Chase, Valor Equity Partners, Andreessen Horowitz, Founders Fund, 137 Ventures, Lux Capital, T. Rowe Price, and Morgan Stanley, we're building the future of American manufacturing-and looking for exceptional people to help make it happen.
If you're ready to take on the most challenging and rewarding work of your career while helping create American manufacturing jobs for generations to come, you're exactly who we're looking for.
The Role
Hadrian is expanding our battery pack assembly team and is looking for a Manufacturing Engineer to help bring our pilot battery pack assembly line from concept to a working, repeatable, and safe production line. This is a hands-on role. Working alongside the Battery Pack Engineering Lead and a small team of specialists, you'll develop and refine the processes, fixturing, and tooling that turn cells into qualified packs. You'll get deep exposure to pack and module assembly, cell joining, thermal management, test, and safety, with room to grow your ownership as the line scales.
What You'll Do
  • Develop, document, and improve assembly processes across the pilot line: cell intake and sorting/matching, module and pack build sequence, busbar and interconnect assembly, thermal interface application, enclosure, and potting/sealing
  • Support cell joining process development (laser / ultrasonic / resistance welding), including weld parameter development, qualification builds, and in-process verification
  • Design and build fixturing, stations, and tooling for the pilot line, with an eye toward eventual automation on Hadrian's robotics and software platform
  • Write and maintain clear work instructions, process control plans, and standard work for assembly operations
  • Support electrical test, formation, and characterization processes, and help define and execute pack-level acceptance testing
  • Implement cell-level traceability and lot control on the line, partnering with Quality on inspection plans and nonconformance dispositions
  • Run root cause and corrective action on process issues, yield losses, and equipment problems; drive improvements to yield, throughput, and cost
  • Support battery safety practices on the floor, including safe handling procedures, thermal runaway mitigation measures, and compliance testing activities (e.g., UN 38.3 transport)
  • Partner cross-functionally with design (mechanical/electrical/thermal), automation/controls, supply chain, quality/qualification, and program teams to move the line toward production readiness
What We're Looking For
  • Bachelor's degree in Electrical, Mechanical, Chemical, Materials, Manufacturing, or Industrial Engineering, or a related technical field
  • 2+ years of manufacturing or process engineering experience, ideally with hands-on exposure to battery pack or module assembly, energy storage, or another electro-mechanical assembly environment
  • Working knowledge of at least one cell joining or precision joining process (laser, ultrasonic, or resistance welding, or comparable processes)
  • Experience developing fixturing, tooling, or work instructions for assembly operations
  • Comfort working on the production floor: building, testing, breaking, and fixing things yourself
  • Strong problem-solving fundamentals, including structured root cause analysis and data-driven process improvement
  • Ability to operate with limited direction in a fast-moving, ambiguous, build-it-now environment
  • Must be a U.S. Person (U.S. citizen or lawful permanent resident) per ITAR; ability to obtain and maintain a U.S. security clearance
What Will Set You Apart
  • Direct battery pack or module assembly experience, especially in aerospace, defense, UAS, eVTOL, EV, or other safety-critical applications
  • Hands-on weld development experience for tabs and busbars, including weld qualification and destructive/non-destructive evaluation
  • Familiarity with battery safety standards and testing (UN 38.3, UL/IEC, abuse testing)
  • Experience with electrical test, formation, or pack characterization
  • Exposure to automation, robotics, or designing processes for high-rate production
  • Experience with traceability systems, MES, or lot control in a regulated or quality-driven environment
  • Experience in a high-growth or startup manufacturing environment
Benefits for Full-time Employees
  • Medical, dental, vision, and life insurance plans for employees
  • 401k
  • Relocation support may be provided for certain situations, based on business need.
  • Flexible vacation policy
  • Equity
ITAR Requirements
To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.
Use of AI in hiring
Hadrian uses AI-assisted tools in our recruiting and hiring processes to help our team work more efficiently. This may include tools that help organize and analyze recruiting data, as well as an AI-powered notetaker that can record and transcribe interviews and help coordinate feedback. These tools support our team and are not used to make hiring decisions. All candidate evaluations and hiring decisions are performed by humans. If an interview will be recorded, you will be notified in advance and may opt out at any time with no impact on your candidacy. Candidate data processed through these tools is subject to the same protections described in our Privacy Policy.
Hadrian Is An Equal Opportunity Employer
It is the Company's policy to provide equal employment opportunity for all applicants and employees. The Company does not unlawfully discriminate on the basis of race inclusive of traits historically associated with race (including, but not limited to, hair texture and protective hairstyles, such as braids, locks and twists), color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, transgender status, national origin (including, in California, possession of a drivers license), ancestry, citizenship, age, physical or mental disability, height or weight, medical condition, family care status, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, exercise of reproductive rights, any other basis protected by local, state, or federal laws, or any combination of the above characteristics. When necessary, the Company also makes reasonable accommodations for disabled candidates and employees, including for candidates or employees who are disabled by pregnancy, childbirth, or related medical conditions.

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