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We figured out the best biggest companies to work for in California using data on salaries, company financial health, and employee diversity. You can also search for the best biggest companies to work for in any other state or city.

Zippia score 4.4
Space Exploration Technologies Corp. is an American space manufacturer, a provider of space transportation services, and a communications corporation headquartered in Hawthorne, California.
Zippia score 4.3
OSI Systems, Inc., together with its subsidiaries, designs, manufactures, and sells specialized electronic systems and components for applications in homeland security, healthcare, and defense and aerospace markets worldwide. It operates in three divisions: Security, Healthcare, and Optoelectronics and Manufacturing. The Security division offers security and inspection systems under the Rapiscan Systems name. Its products are used to inspect baggage, cargo, vehicles, and other objects for weapons, explosives, drugs, and other contraband, as well as to screen people. These products are also used in the verification of cargo manifests for the purpose of assessing duties, and monitoring the export and import of controlled materials. The Healthcare division provides patient monitoring, diagnostic cardiology, and anesthesia delivery and ventilation systems under the Spacelabs name. These products are used in critical care, emergency, and perioperative areas within hospitals, physicianâ€:tm:s offices, medical clinics, and ambulatory surgery centers. The Optoelectronics and Manufacturing division designs, manufactures, and markets optoelectronic devices under the OSI Optoelectronics name. It also provides electronics manufacturing services under the OSI Electronics name for use in a range of applications, including aerospace and defense electronics, security and inspection systems, medical imaging and diagnostics, computed tomography, telecommunications, office automation, computer peripherals, and industrial automation. In addition, this division designs toll and traffic management systems under the OSI LaserScan name and systems for measuring bone density under the Osteometer name. OSI Systems, Inc. was founded in 1987 and is headquartered in Hawthorne, California.
Zippia score 4.1
Eureka! Restaurant Group, LLC (“Eureka!”), a leading California-based family of restaurants serving authentic, locally sourced food complemented with a curated selection of 100% American craft beer, whiskey and spirits.
Zippia score 4.1
The Resource Collection, Inc. provides facilities maintenance services to businesses in the United States and Canada. The company provides building maintenance services, including janitorial, day porter, hard surfaced floor reconditioning and refinishing, and lighting maintenance; carpet cleaning, repair, and replacement services; and drapery and blind cleaning, repair, and installation services. It also provides landscape management services, such as landscape installation, design, maintenance, hardscapes, water management and conservation, sprinkler installation and repair, drip irrigation systems, tree trimming, arborist services, and horticultural services; and security services. In addition, the company provides parking lot sweeping, day porter, steam cleaning, slurry coating and striping, degreasing, painting curbs, trash and debris pick-up, concrete repair, and replacement services; green and day cleaning services; and graffiti services, such as graffiti removal, wet sand blasting, chemical removers, paint-out, and glass replacement services. Further, it offers interior plant services, including plantscape installation, design, leasing sales and rental, maintenance, renovation, interior irrigation systems, containers and baskets, flower programs, specimen plants, and tropicals and exotics; and pressure washing services for architectural assets, such as brick, cement, tile, stone, wood, stucco, asphalt, marble, sandstone, and painted surfaces. Furthermore, the company provides cleaning, repair, and maintenance services for windows, awnings, gutters, mullions, and other architectural components; and handyman services, including inspection, assessment, design, installation, assembly, refreshing, repairing, remodeling, and preventative maintenance programs. It also offers restoration services, such as metal refurbishing, stone restoration, tile sanitation, and waterproof caulking. The company was founded in 1962 and is based in Hawthorne, California.
Zippia score 3.5
OSI Optoelectronics, Inc. develops and manufactures standard and custom photodiode and optical sensors worldwide. It offers custom and OEM solutions, such as custom silicon, InGaAs, and GaAs photodiodes, as well as semiconductor devices; manual and automated gold and aluminum wire bonding; device assembly and packaging; high performance ceramic hybrids; automated PCB assembly; manual and automated production testing and fixtures; custom cable assemblies; plastic molded packaging; complete box-build; and environmental test and qualification solutions for aerospace and defense, life and health science, optical communications, industrial test and measurement, commercial and consumer, and X-Ray sectors. The company also provides standard products, such as parametric products, silicon photodiodes, and InGaAs and GaAs photodiodes. OSI Optoelectronics, Inc. was formerly known as UDT Sensors, Inc. and changed its name to OSI Optoelectronics, Inc. in February 2006. The company was founded in 1967 and is headquartered in Hawthorne, California with manufacturing facilities in India and Malaysia. OSI Optoelectronics, Inc. operates as a subsidiary of OSI Systems, Inc.
Zippia score 3.3
UniNet is a worldwide quality manufacturer and solutions provider to OEMs and remanufacturers, as well as a distributor of printer toner, chips, laser, MFP, ink, copier and cartridge recycling components. UniNet offers a wide and complete selection of ...
Zippia score 3.6
Hawthorne School District is a school district headquartered in Hawthorne, California, United States. The district serves much of Hawthorne.
Zippia score 4.0
From concept to consumer Printegration illustrates Lithographix's all under one roof creative, print and delivery services offering shorter production cycles, impeccable quality, lower costs and multi-channel delivery. Lithographix the premier offset a...
Zippia score 4.1
Zippia score 4.3
It all began in 1992 when EagleRider pioneered the motorcycle rental concept and guided motorcycle tour business. We started with Harleys and have since gone on to become the world's largest motorcycle tourism company providing a huge variety of beautifully maintained Harley-Davidson, Indian, Triumph, BMW, and Honda motorcycles as well as all kinds of ATVs, Dirt Bikes, and Scooters to accommodate any motorcycle rental or tour experience. EagleRider is intimately aware of the needs of motorcycle enthusiasts and adventure travelers; we allow one-way rentals and guided tours between our more than 100 motorcycle rental and touring facilities all located in the most desirable tourist destinations in the world. Unlike competitors who typically carry only one make, our locations feature all the major touring motorcycles like the Indian Chief Vintage, Indian Chieftan, Electra Glide, Street Glide, Road King, Fat Boy, and Heritage Softail-making us a one stop shop for Harley rentals and Indian Motorcycle rentals.
Zippia score 4.1
Michael Stars is a Los Angeles-based apparel and lifestyle retail company that offers women's and men's fashion, including t-shirts, bottoms, dresses, sweaters, jackets, and accessories.
Zippia score 4.6
Fulham is a maker and distributor of all kinds of lighting systems, which recently entered the light-emitting diode market. Based in Hawthorne, Calif., Fulham also specializes in fluorescent ballasts and LED fixtures that regulate the flow of power in lamps. It will use its new financing to shift even more focus to newer technologies and to expand its sales organization around the world.
Zippia score 4.3
Trident is a full service dental lab serving dentists and patients across the United States since 1988. We are committed to help make your practice successful.
Zippia score 4.2
XDBS is a growing business information services company. It provides services in the areas of data, research & demand generation. XDBS provides services in the areas of B2B demand generation, strategic account profiling, lead generation, appointment garnering, market research, profiling, role-based contact discovery, CRM management, data cleansing & appends, contact harvesting, role-mapping and high-end infrastructure mapping.
Zippia score 3.9
Dr Farel Rosenberg began his business Orthodontics Only in 1974 with the idea of helping most of the population in the South Bay area and vicinities to achieve a beautiful smile. He always thought about helping, because there's a lot of people that fee...
Zippia score 4.1
SkyOne Federal Credit Union is a US credit union, headquartered in Hawthorne, California, it is federally insured by the National Credit Union Administration and is an Equal Housing Lender.
Zippia score 3.8
Richstone Family Center is creating safe and resilient families in which children can grow and thrive through programs and services.
Zippia score 4.1
Zippia score 3.8
The Third Revolution in Aviation has begun and Ampaire is leading the charge by developing aircraft that make flying clean, quiet, safe, reliable, affordable, and more accessible to more people than ever before. With key innovations in energy storage, propulsion, and aircraft architecture, the Ampaire team is maximizing the potential of the aircraft industry. Ampaire is a portfolio company of the Los Angeles Cleantech Incubator. It was founded in year 2016 and is based in Los Angeles, California.
Zippia score 3.9
Zippia score 4.6
A premier Native American-owned luxury resort in Arizona, Sheraton Grand at Wild Horses Pass is an authentic representation of the Gila River Indian Community's heritage and culture. The resort houses a private pool and cafe, a golf course, and restaurants.
Zippia score 4.6
Tesla Motors was started by a group of Silicon Valley entrepreneurs and strives to create a revolution and accelerate the world's transition to electric mobility with a full range of increasingly affordable electric cars. Tesla vehicles are EVs (electric vehicles), which are transforming the way people drive and move. Tesla has gone public as of June 29, 2010 and has a market cap of $34.32 billion. Tesla Motors' goal is to increase the number and variety of EVs through three strategies. The first is to sell its own branded vehicle through its showrooms. Second is to sell premium, high-quality, patented electric components to other automakers. Lastly, it serves as a “catalyst and positive example to other automakers.” There has already been a movement in the EV market with the push of the GM Volt, rumored to have been inspired by the Tesla Roadster.
Zippia score 4.5
FSA Food is a privately-held, family-owned company that provides foodservice solutions to clients in the mid-west, west, and Alaska areas. They have state-of-the-art distribution centers that offer quality services to public or private, independent or chain, as well as local on national businesses.
Zippia score 4.5
Teledyne Technologies provides electronic components, instruments, and communications products in the U.S., Europe, Japan, and Canada. Its Electronics and Communications division offers microwave components and subsystems, high-voltage connectors, and imaging sensors, among other things. Its Systems Engineering Solutions division handles advanced technology applications, software development, and manufacturing solutions for space, military, environmental, and missile-defense markets. Aerospace Engines and Components designs, develops, and manufactures engines, engine controls, and aviation batteries. Energy Systems offers hydrogen-gas generators and thermoelectric and fuel-cell-based power sources for power plants, semiconductor manufacturing, and other industrial processes. Teledyne was founded in 1960 and is based in Thousand Oaks, Calif.
Zippia score 4.4
Party City Corporation is America's largest retailer of Halloween costumes, theme party supplies, birthday decorations, and other specialty party supplies, operating more than 600 company-owned and franchise stores throughout the United States and Puerto Rico. As part of the Amscan Holdings, Inc., (AHI), group of companies, Party City is among the more than 900 specialty party stores that AHI either owns, operates or franchises.
Zippia score 4.9
Southern California Gas is an oil and gas company that distributes natural gas in the United States. Its services also include residential services, energy efficiency programs, commercial, and Industrial Services.
Zippia score 4.1
Advance America, Cash Advance Centers Inc. provides cash advance services primarily in the United States. The company offers cash advance services comprising cash advances and installment loans to middle-income working individuals; check-cashing services; pre-paid debit cards; and money orders and money transfer, and bill payment services as an agent of a licensed third-party money transmitter. As of December 31, 2011, it operated 2,541 centers in 29 states in the United States, 33 centers in the United Kingdom, and 10 centers in Canada, as well as had 13 limited licensees in the United Kingdom. The company operates its centers under the Advance America, National Cash Advance, Check Advance, First American Cash Advance, First American Cash Loans, First American Loans, Purpose Financial, and Purpose Money brands. Advance America, Cash Advance Centers, Inc. was founded in 1997 and is headquartered in Spartanburg, South Carolina. As of April 23, 2012, Advance America, Cash Advance Centers Inc. operates as a subsidiary of Grupo Elektra SA de CV.
Zippia score 4.7
Western Dental & Orthodontics is a full service dentistry. We offer general, emergency and cosmetic dentistry as well as specialty dental services, braces & affordable dental insurance. Call today!
Zippia score 3.9
Superior Grocers is one of the largest independently-owned chains of grocery stores in Southern California. Our philosophy is to offer the highest quality products at the lowest prices with exceptional customer service.
Zippia score 4.0
Transforming Lives Through the Power of Work.
Zippia score 4.2
WELCOME TO G&M OIL COMPANY LEARN ABOUT OUR APP Founded in 1969, Our goal at G&M Oil Company is to...
Zippia score 4.3
American Tire Depot provides guaranteed lowest prices on tires and wheels. Discounted tire prices are available at more than 99 California locations.
Zippia score 4.7
RailWorks Corporation and its operating subsidiaries provide railway construction and railroad maintenance services for a range of customers - from major transit authorities, to commercial and industrial companies, to railroads of all sizes - through two primary business units: Track and Transit & Systems.
Zippia score 4.0
Labor Finders is the leader in blue collar day labor and industrial staffing.
Zippia score 4.2
FinishMaster, Inc., a leading distributor of paint and related products in the United States and subsidiary of Uni-Select Inc. (TSX:UNS), a leading distributor of automotive products in Canada.
Zippia score 4.6
Wescom Credit Union is a credit union and financial services company serving Southern California.
Zippia score 4.5
College Medical Center operates as a for-profit, community teaching hospital. The company offers services in the areas of behavioral health, cardiopulmonary, epidemiology/infection control, emergency, family health, intensive care, laboratory, nursing, partial hospitalization, perinatal/OB, pharmacy, physical therapy, radiology, and surgery. The company was formerly known as Pacific Hospital of Long Beach and changed its name to College Medical Center in October, 2013. The company was founded in 1932 and is based in Long Beach, California. As of October 8, 2013, College Medical Center operates as a subsidiary of College Health Enterprises, Inc.
Zippia score 3.4
Osi electronics develops innovative products and services that create customer value, demonstrates operational excellence by ensuring industry leading product performance, and seeks to create a work environment of trust and respect that recognizes and rewards job performance.
Zippia score 4.2
WMK, Inc., doing business as MobilityWorks, is engaged in selling, servicing, and renting new and used wheelchair accessible minivans, full-size vans with lifts, and commercial fleet vehicles for the disabled community. It offers side entry minivans, rear entry minivans, and full size van conversions; wheelchair accessible trucks, SUVs, and adaptive equipment modifications; and other wheelchair accessible vehicles. The company also provides dual-post and single-post wheelchair lifts; minivans, transport vans, shuttles, and ambulettes; shuttle and paratransit buses, hotel shuttles, custom commercial vans, and accessible taxis; TradeWorks, a trade-in program; wheelchair van repair and maintenance services; adaptive equipment installation, repairs, and maintenance inspections; and conversion maintenance inspection. In addition, it offers financing, extended warranties, rental vans, a 24-hour emergency help line, and mechanical services. The company serves individuals and business clients in the metropolitan areas of the United States, including Atlanta, Birmingham, Boston, Chicago, Cleveland, Detroit, Jacksonville, Los Angeles, Miami, Milwaukee, Nashville, New York, Newark, Oakland, Philadelphia, Pittsburgh, Sacramento, San Francisco, San Jose, Washington D.C., and others. WMK, Inc. was formerly known as New Era Transportation Inc. and changed its name to WMK, Inc. in 1997. The company was founded in 1986 and is based in Akron, Ohio. It has showrooms in Alabama, California, Connecticut, Florida, Georgia, Illinois, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Texas, Vermont, Virginia, and Wisconsin.
Zippia score 3.8
The William Warren Group (WWG) is a national self storage management company that manages self storage assets for its own accounts, as well as for other third party investors.
| Rank | Company | Zippia score |
|---|---|---|
| 1 | SpaceX | |
| 2 | OSI Systems | |
| 3 | Eureka! Restaurant Group | |
| 4 | The Resource Collection | |
| 5 | OSI Optoelectronics | |
| 6 | Uninet Imaging | |
| 7 | HAWTHORNE ELEMENTARY SCHOOL DISTRICT | |
| 8 | Lithographix | |
| 9 | Teledyne Relays | |
| 10 | EagleRider | |
| 11 | Michael Stars | |
| 12 | Fulham Co. | |
| 13 | Trident Dental Lab | |
| 14 | XDBS | |
| 15 | Orthodontics Only | |
| 16 | SkyOne Federal Credit Union | |
| 17 | Richstone Family Center | |
| 18 | Restoration Investments Inc. | |
| 19 | Ampaire | |
| 20 | G S Printing |