# The 47 largest Facilities Services companies in California

Tamtam tracks 47 Facilities Services companies headquartered in California. This list ranks all of them by number of employees on LinkedIn, led by KBS - Kellermeyer Bergensons Services, LLC, Able Services and CoolSys - Refrigeration and HVAC Systems. Their median headcount is 182. Half of them were founded in 1993 or later. The most common headquarters are San Diego (5), San Jose (4) and Irvine (3).

The Facilities Services sector in California comprises a mix of established companies and more recently founded firms, primarily focusing on maintenance, cleaning, and specialized technical services. Companies like KBS - Kellermeyer Bergensons Services, Able Services, and Flagship Facility Services, Inc. offer a broad range of janitorial, engineering, and maintenance solutions. Others, such as CoolSys - Refrigeration and HVAC Systems and EMCOR Services Mesa Energy, specialize in HVAC and energy solutions, while Prudential Overall Supply provides work wear and cleanroom apparel services.

Many of these companies, including KBS and Able Services, serve a wide geographical area beyond California, often across North America. A notable pattern among the listed companies is the strong presence of firms offering comprehensive building maintenance and specialized technical services like HVAC and refrigeration, indicating a mature market for integrated facility management solutions.

🇺🇸 California · 47 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [KBS - Kellermeyer Bergensons Services, LLC](https://www.tamtam.ai/c/kbs-kellermeyer-bergensons-services-llc) (kbs-services.com)<br>Provides janitorial services, floor care, exterior maintenance, facility operations support, and hospitality staffing across North America to businesses for clean environments. | Facilities Services | 🇺🇸 Oceanside | 5,743 |  |
| 2 | [Able Services](https://www.tamtam.ai/c/able-services) (abm.com)<br>A company specializing in facility services, engineering, and technical services, focused on enhancing occupant experience and improving spaces through innovation and sustainability | Facilities Services | 🇺🇸 San Francisco | 1,851 |  |
| 3 | [CoolSys - Refrigeration and HVAC Systems](https://www.tamtam.ai/c/coolsys-refrigeration-and-hvac-systems) (coolsys.com)<br>This company provides sustainable refrigeration, HVAC, energy, and engineering solutions for various sectors, covering the entire lifecycle of commercial systems | Facilities Services | 🇺🇸 Brea | 1,675 | 1997 |
| 4 | [Flagship Facility Services, Inc.](https://www.tamtam.ai/c/flagship-facility-services-inc) (flagshipinc.com)<br>A facilities maintenance company providing janitorial, engineering, and maintenance services to industries across the US and Canada, focusing on customer experience | Facilities Services | 🇺🇸 San Jose | 1,528 | 1988 |
| 5 | [TruGreen LawnCare](https://www.tamtam.ai/c/trugreen-lawncare) (trugreen.com)<br>Partnership providing scholarships and professional development for students pursuing careers in agronomy, plant science, and related sciences. | Facilities Services | 🇺🇸 East Palo Alto | 1,382 |  |
| 6 | [EMCOR Services Mesa Energy](https://www.tamtam.ai/c/emcor-services-mesa-energy) (mesaenergy.com)<br>This company provides HVAC, building automation, and retrofit services, delivering customized energy solutions for enhanced occupant comfort and lower operating costs | Facilities Services | 🇺🇸 Irvine | 685 |  |
| 7 | [Prudential Overall Supply](https://www.tamtam.ai/c/prudential-overall-supply) (prudentialuniforms.com)<br>Family-owned and operated since 1932, provides work wear uniforms, career apparel, casual wear, facility image, safety requirements and cleanroom apparel services for various industries. | Facilities Services | 🇺🇸 Irvine | 654 | 1932 |
| 8 | [Merced City School District](https://www.tamtam.ai/c/merced-city-school-district) (mcsd.k12.ca.us)<br>Facilities services provider based in Merced, California, offering services to the local community and ensuring efficient operation of buildings | Facilities Services | 🇺🇸 Merced | 644 |  |
| 9 | [COIT Cleaning and Restoration Services](https://www.tamtam.ai/c/coit-cleaning-and-restoration-services) (coit.com)<br>Full service cleaning and restoration company offering a wide range of services from carpets and upholstery to water extraction and mold remediation | Facilities Services | 🇺🇸 Burlingame | 565 | 1950 |
| 10 | [Therma](https://www.tamtam.ai/c/therma) (therma.com)<br>Maximizing energy efficiency through engineering, construction, installation, and maintenance of mechanical and plumbing systems for complex built environments and manufacturing facilities. | Facilities Services | 🇺🇸 San Jose | 528 |  |
| 11 | [Servicon](https://www.tamtam.ai/c/servicon) (servicon.com)<br>Servicon provides flexible cleaning and maintenance solutions to various industries, focusing on creating healthy environments and embracing innovation in the industry | Facilities Services | 🇺🇸 Culver City | 515 | 1973 |
| 12 | [Stratus Building Solutions](https://www.tamtam.ai/c/stratus-building-solutions) (stratusclean.com)<br>Provider of green commercial janitorial services, offering comprehensive eco-friendly cleaning options using state-of-the-art equipment and non-toxic products Also provides franchising opportunities | Facilities Services | 🇺🇸 North Hollywood | 515 | 2006 |
| 13 | [Sciens Building Solutions](https://www.tamtam.ai/c/sciens-building-solutions) (sciensusa.com)<br>Provider of fire protection, security, communications, and electrical solutions for various industries, dedicated to ensuring safety, protection, and business continuity | Facilities Services | 🇺🇸 Pleasanton | 508 | 2016 |
| 14 | [The Arcticom Group](https://www.tamtam.ai/c/the-arcticom-group) (thearcticomgroup.com)<br>A family of HVACR operating companies offering high-quality services, maintenance, repairs, and installations with a focus on efficiency and customer satisfaction | Facilities Services | 🇺🇸 Walnut Creek | 491 | 2017 |
| 15 | [Celebrity Cruise Line](https://www.tamtam.ai/c/celebrity-cruise-line) (celebritycruises.com)<br>Facilities services company based in Santa Monica, California, specializing in services related to Celebrity Cruise Line | Facilities Services | 🇺🇸 Santa Monica | 488 |  |
| 16 | [Western Exterminator Company](https://www.tamtam.ai/c/western-exterminator-company) (westernexterminator.com)<br>A family-owned pest control company offering top-notch service since 1921, with a commitment to customer satisfaction and excellence | Facilities Services | 🇺🇸 Anaheim | 484 |  |
| 17 | [Vortex Doors](https://www.tamtam.ai/c/vortex-doors) (vortexdoors.com)<br>Industry expert in commercial and industrial door repair services, offering fast and friendly customer service with a wide range of repair options | Facilities Services | 🇺🇸 Irvine | 473 | 1937 |
| 18 | [Air Systems, Inc.](https://www.tamtam.ai/c/air-systems-inc) (airsystemsinc.com)<br>Air Systems provides comprehensive facilities solutions with a focus on quality, sustainability, and customer satisfaction throughout the entire building cycle | Facilities Services | 🇺🇸 San Jose | 368 |  |
| 19 | [Corovan](https://www.tamtam.ai/c/corovan) (corovan.com)<br>A family-owned commercial moving and storage company in California offering expert relocation services, warehousing solutions, and logistics for enterprise-scale moves | Facilities Services | 🇺🇸 Poway | 349 | 1948 |
| 20 | [Spotless](https://www.tamtam.ai/c/spotless) (getspotless.com)<br>A dedicated flooring specialist with 16 years experience in providing top-notch commercial and residential carpet cleaning and floor care services | Facilities Services | 🇺🇸 Pleasanton | 347 | 2000 |
| 21 | [Rockport Administrative Services](https://www.tamtam.ai/c/rockport-administrative-services)<br>Provider of high-quality, person-centered care for older adults through innovative programs, including volunteer initiatives, in post-acute and long-term care settings | Facilities Services | 🇺🇸 Los Angeles | 317 |  |
| 22 | [Pegasus](https://www.tamtam.ai/c/pegasus) (elevate.pegasusclean.com)<br>Global leader in critical cleaning using advanced technology to create clean, healthy indoor environments for commercial and industrial facilities Recognized for growth and workplace excellence | Facilities Services | 🇺🇸 San Diego | 256 | 1969 |
| 23 | [Peterson Power Systems](https://www.tamtam.ai/c/peterson-power-systems) (petersonpower.com)<br>Provider of Caterpillar diesel and natural gas engines, power generation solutions, temperature control systems, marine applications, UPS systems, fuel cells, switchgear, parts, service, and rental power equipment | Facilities Services | 🇺🇸 San Leandro | 199 | 1936 |
| 24 | [DMS Facility Services](https://www.tamtam.ai/c/dms-facility-services) (dmsfacilityservices.com)<br>A people-oriented, environmentally responsible organization providing high-quality, cost-effective service solutions to businesses and communities, using sustainable products and procedures | Facilities Services | 🇺🇸 South Pasadena | 182 | 1969 |
| 25 | [Stations San Jose](https://www.tamtam.ai/c/stations-san-jose) (gostations.com)<br>With 30 years of experience in the Communications industry, we offer high-quality product installations at competitive prices, leveraging a vast network of contacts | Facilities Services | 🇺🇸 San Jose | 168 | 1993 |
| 26 | [Industrial Electrical Company](https://www.tamtam.ai/c/industrial-electrical-company) (industrialelectricalco.com)<br>A third-generation family-owned industrial electrical company offering contracting, product sales, motor repair, field services, welder and generator sales/service, and technical training since 1935 | Facilities Services | 🇺🇸 Modesto | 165 | 1935 |
| 27 | [Pacific Coast Companies Inc](https://www.tamtam.ai/c/pacific-coast-companies-inc) (paccoast.com)<br>A team of professionals offering various business services and support such as marketing, accounting, HR, IT, risk management, and legal services | Facilities Services | 🇺🇸 Rancho Cordova | 163 | 2000 |
| 28 | [Geil Enterprises Inc](https://www.tamtam.ai/c/geil-enterprises-inc) (geilenterprises.com)<br>Employee-owned company in Central Valley, CA since 1986 Divisions offer security, cleaning, alarm systems, and janitorial supplies to commercial/industrial businesses | Facilities Services | 🇺🇸 Fresno | 162 | 1986 |
| 29 | [MIC TTTTT](https://www.tamtam.ai/c/mic-ttttt)<br>Specializing in MIC treatment and maintenance services to protect equipment and infrastructure from microbial influenced corrosion | Facilities Services | 🇺🇸 Poway | 161 | 2003 |
| 30 | [Lloyd Pest Control](https://www.tamtam.ai/c/lloyd-pest-control) (lloydpest.com)<br>A leading pest and termite control company in Southern California with guaranteed solutions, personalized service, 24/7 access, and a strong reputation for ethics and customer satisfaction | Facilities Services | 🇺🇸 San Diego | 155 | 1931 |
| 31 | [Sabah International](https://www.tamtam.ai/c/sabah-international) (sciensusa.com)<br>Specializes in fire protection systems, including clean agent suppression, fire alarm, and life safety systems for various industries in California | Facilities Services | 🇺🇸 Pleasanton | 154 | 1972 |
| 32 | [C & L Refrigeration](https://www.tamtam.ai/c/c-and-l-refrigeration) (clrefrigeration.com)<br>A family-owned HVACR service provider offering innovative solutions for commercial and industrial clients across multiple states, focused on customer satisfaction and employee development | Facilities Services | 🇺🇸 Fullerton | 149 | 1977 |
| 33 | [Servi-Tek Facility Solutions](https://www.tamtam.ai/c/servi-tek-facility-solutions) (servi-tek.net)<br>The company is a leader in innovative technology and exceptional service, focusing on customer happiness and staff development | Facilities Services | 🇺🇸 San Diego | 148 | 2006 |
| 34 | [CarPark](https://www.tamtam.ai/c/carpark) (carpark.com)<br>An LA-based company specializing in parking facility management and transportation, dedicated to enhancing customer experience and improving the bottom line | Facilities Services | 🇺🇸 Los Angeles | 131 | 2005 |
| 35 | [Professional Maintenance Systems](https://www.tamtam.ai/c/professional-maintenance-systems) (pmsjanitorial.com)<br>A professional cleaning company with over 40 million SF of facilities in California & Washington, certified in safety, sustainability, and diversity | Facilities Services | 🇺🇸 San Diego | 56 | 1982 |
| 36 | [Zan Compute](https://www.tamtam.ai/c/zan-compute) (zancompute.ai)<br>Zan Compute offers an AI-based facility maintenance platform, Zanitor, that automates custodial processes with real-time tracking for efficient and cost-effective cleaning management | Facilities Services | 🇺🇸 Santa Clara | 51 | 2014 |
| 37 | [Patriot Logistics](https://www.tamtam.ai/c/patriot-logistics) (patriotadvantage.com)<br>A logistics and facilities solutions partner serving major retailers in the Western United States, offering maintenance, redeployment, asset tracking, warehousing, transportation, and value-added services | Facilities Services | 🇺🇸 Stockton | 45 | 2005 |
| 38 | [USC Facilities Management Services](https://www.tamtam.ai/c/usc-facilities-management-services) (fpm.usc.edu)<br>A facilities management company supporting USC's research, academic, and patient care programs, maintaining physical assets with quality service and sustainability | Facilities Services | 🇺🇸 Los Angeles | 30 |  |
| 39 | [ARC Facilities](https://www.tamtam.ai/c/arc-facilities) (arcfacilities.com)<br>Pioneering mobile facility management software for quick access to building plans, shut-off locations, and equipment details anytime, anywhere Visit website for more information | Facilities Services | 🇺🇸 San Ramon | 27 | 2016 |
| 40 | [Skyline Building Care](https://www.tamtam.ai/c/skyline-building-care) (skylinebuildingcare.com)<br>Professional janitorial services company specializing in comprehensive building maintenance solutions with a focus on high-quality, customized cleaning using advanced equipment and green products | Facilities Services | 🇺🇸 Walnut Creek | 22 | 2010 |
| 41 | [Service 1st Contractors](https://www.tamtam.ai/c/service-1st-contractors) (service-1st.com)<br>Specializing in installation, maintenance, and repair of commercial plumbing, HVAC, refrigeration, kitchen equipment, electrical, and pool systems for property and facilities management industries Offers 24/7 service | Facilities Services | 🇺🇸 Santa Ana | 20 | 1985 |
| 42 | [SmartRise Elevator Service Inc](https://www.tamtam.ai/c/smartrise-elevator-service-inc) (smartriseelevator.com)<br>A mid-sized elevator service company offering expert maintenance, repair, and consulting services with a focus on customer satisfaction and communication | Facilities Services | 🇺🇸 Santa Fe Springs | 10 | 2009 |
| 43 | [IoEnergy, Inc.](https://www.tamtam.ai/c/ioenergy-inc) (ioenergyinc.com)<br>Energy efficiency and building technology firm specializing in high ROI upgrades, IoT solutions, renewable energy projects, and carbon footprint management for commercial and industrial clients | Facilities Services | 🇺🇸 Carmel | 7 | 2015 |
| 44 | [Blue Planet Energy Solutions](https://www.tamtam.ai/c/blue-planet-energy-solutions) (blueplanetes.com)<br>An energy service company providing a range of energy solutions, including design, implementation, retrofitting, energy conservation, power generation, and energy-efficient equipment installation | Facilities Services | 🇺🇸 San Diego | 4 | 2010 |
| 45 | [Nite & Day Power](https://www.tamtam.ai/c/nite-and-day-power) (niteanddaypower.com)<br>Provider of backup power systems and services for businesses in the San Francisco Bay Area since 1986 Offers 24/7 support, maintenance plans, and reliable customer service | Facilities Services | 🇺🇸 Ben Lomond | 3 | 1986 |
| 46 | [Delta Power Inc.](https://www.tamtam.ai/c/delta-power-inc) (deltapowerinc.com)<br>Established in 1983, the company provides installation and maintenance services for standby/emergency power and distribution systems, enhancing reliability through project-specific analysis and maintenance regimens | Facilities Services | 🇺🇸 Santa Ana | 3 | 1983 |
| 47 | [Intrinzec](https://www.tamtam.ai/c/intrinzec) (intrinzec.com)<br>The company specializes in providing comprehensive energy solutions through engineering, design, project management, and system integration for efficient and synchronized building systems | Facilities Services | 🇺🇸 San Clemente | 1 | 2016 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

## More company lists in California

- [The largest companies in California](https://www.tamtam.ai/l/largest-companies-california) (15,265)
- [Multinational companies in California](https://www.tamtam.ai/l/multinational-companies-california) (2,592)
- [SaaS companies in California](https://www.tamtam.ai/l/saas-companies-california) (1,855)
- [Software Development companies in California](https://www.tamtam.ai/l/software-development-companies-california) (1,650)
- [AI companies in California](https://www.tamtam.ai/l/ai-companies-california) (1,297)
- [Companies with in-house R&D in California](https://www.tamtam.ai/l/r-and-d-companies-california) (1,276)
- [Manufacturers in California](https://www.tamtam.ai/l/manufacturers-california) (1,066)
- [Hardware manufacturers in California](https://www.tamtam.ai/l/hardware-companies-california) (985)
- [IT Services and IT Consulting companies in California](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-california) (968)
- [Education providers in California](https://www.tamtam.ai/l/education-companies-california-united-states) (950)
- [Subscription businesses in California](https://www.tamtam.ai/l/subscription-businesses-california) (940)
- [Venture capital and private equity firms in California](https://www.tamtam.ai/l/vc-and-private-equity-firms-california) (917)
- [Professional services firms in California](https://www.tamtam.ai/l/professional-services-firms-california) (880)
- [Companies with a mobile app in California](https://www.tamtam.ai/l/companies-with-mobile-app-california) (827)
- [Retail chains in California](https://www.tamtam.ai/l/retail-chains-california) (803)
- [IT services companies in California](https://www.tamtam.ai/l/it-services-companies-california) (796)
- [Venture Capital and Private Equity Principals companies in California](https://www.tamtam.ai/l/venture-capital-and-private-equity-principals-companies-california) (731)
- [Financial services firms in California](https://www.tamtam.ai/l/financial-services-firms-california) (711)
- [Financial Services companies in California](https://www.tamtam.ai/l/financial-services-companies-california) (642)
- [Healthcare providers in California](https://www.tamtam.ai/l/healthcare-providers-california) (569)
- [AI-native companies in California](https://www.tamtam.ai/l/ai-native-companies-california) (561)
- [Hospitals and Health Care companies in California](https://www.tamtam.ai/l/hospitals-and-health-care-companies-california) (555)
- [Consulting firms in California](https://www.tamtam.ai/l/consulting-firms-california) (551)
- [Public sector organisations in California](https://www.tamtam.ai/l/public-sector-organisations-california) (535)

## The same list elsewhere in United States

- [Facilities Services companies in the United States](https://www.tamtam.ai/l/facilities-services-companies-united-states) (527)
- [Facilities Services companies in New York State](https://www.tamtam.ai/l/facilities-services-companies-new-york-state) (90)
- [Facilities Services companies in Texas](https://www.tamtam.ai/l/facilities-services-companies-texas) (47)
- [Facilities Services companies in Florida](https://www.tamtam.ai/l/facilities-services-companies-florida) (36)
- [Facilities Services companies in Ohio](https://www.tamtam.ai/l/facilities-services-companies-ohio) (26)
- [Facilities Services companies in New York](https://www.tamtam.ai/l/facilities-services-companies-new-york) (28)

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Source: https://www.tamtam.ai/l/facilities-services-companies-california