# Top 29 facility management companies in California

Tamtam tracks 29 facility management companies headquartered in California. This list ranks all of them by number of employees on LinkedIn, led by Allied Universal, KBS - Kellermeyer Bergensons Services, LLC and Legence. Their median headcount is 609. Half of them were founded in 1989 or later. The most common headquarters are Los Angeles (5), San Diego (4) and San Jose (3).

These California-based companies specialize in facility management, encompassing a broad range of services from comprehensive security and janitorial work to advanced energy efficiency and mechanical contracting. The list includes large corporations like Allied Universal, which provides tailored security and facility services, and KBS - Kellermeyer Bergensons Services, LLC, focusing on janitorial and exterior maintenance. Also present are specialized firms such as Legence, an integrated provider of energy efficiency solutions, and ACCO Engineered Systems, a mechanical contractor for HVAC and plumbing.

A notable pattern among these companies is the diverse scope of their offerings, often integrating technology and sustainability. While many provide traditional facility services, others like PRIDE Industries combine business excellence with social impact by employing people with disabilities. Headquarters are distributed across Southern California cities such as Irvine, Oceanside, and Los Angeles, alongside Northern California hubs like San Jose and San Francisco.

🇺🇸 California · 29 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Allied Universal](https://www.tamtam.ai/c/allied-universal) (aus.com)<br>Provides tailored security and facility services using smart technology, supporting diverse sectors with local leadership and community presence. | Professional Services | 🇺🇸 Irvine | 104,797 |  |
| 2 | [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 |  |
| 3 | [Legence](https://www.tamtam.ai/c/legence) (wearelegence.com)<br>Integrated provider of energy efficiency and sustainability solutions for diverse industries, specializing in advisory, engineering, contracting, and maintenance services for high-performance facilities | Construction | 🇺🇸 San Jose | 3,648 |  |
| 4 | [ACCO Engineered Systems](https://www.tamtam.ai/c/acco-engineered-systems) (accoes.com)<br>A leading mechanical contractor offering design, installation, maintenance, and service of HVAC, refrigeration, plumbing, process piping, and building automation systems | Construction | 🇺🇸 Pasadena | 2,686 |  |
| 5 | [PRIDE Industries](https://www.tamtam.ai/c/pride-industries) (prideindustries.com)<br>Delivering business excellence with a positive social impact by providing career opportunities and training for people with disabilities and other barriers to employment | Non-profit Organizations | 🇺🇸 Roseville | 2,195 | 1966 |
| 6 | [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 |  |
| 7 | [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 |
| 8 | [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 |
| 9 | [All Star](https://www.tamtam.ai/c/all-star) (all-star.com)<br>A privately owned firm specializing in aerospace support, facilities maintenance, military housing, logistics, construction, and fleet maintenance for military, government, and commercial contracts | Defense and Space Manufacturing | 🇺🇸 San Diego | 1,501 | 1983 |
| 10 | [Blackstone Consulting, Inc.](https://www.tamtam.ai/c/blackstone-consulting-inc) (blackstone-consulting.com)<br>A minority-owned company providing environmental, security, facilities maintenance, staffing, and food service management services to national and international clients since 1991 | Environmental Services | 🇺🇸 Los Angeles | 1,091 | 1991 |
| 11 | [Kinetics](https://www.tamtam.ai/c/kinetics) (exentec.net)<br>A full-service process and mechanical contractor specializing in design and installation of systems for technology-driven markets, with global support and focus on safety and customer service | Construction | 🇺🇸 Livermore | 1,014 | 1973 |
| 12 | [SodexoMagic](https://www.tamtam.ai/c/sodexomagic) (sodexomagic.com)<br>A joint venture between Sodexo and Magic Johnson Enterprises providing innovative, flexible, and comprehensive service solutions in food, wellness, and quality of life | Consumer Services | 🇺🇸 Beverly Hills | 789 | 2006 |
| 13 | [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 |  |
| 14 | [Los Angeles County Internal Services Department](https://www.tamtam.ai/c/los-angeles-county-internal-services-department) (isd.lacounty.gov)<br>The company prioritizes speed, reliability, and value in its services or products | Government Administration | 🇺🇸 Los Angeles | 648 | 1989 |
| 15 | [DTZ, a UGL company](https://www.tamtam.ai/c/dtz-a-ugl-company) (cushmanwakefield.com)<br>Global leader in property services offering end-to-end solutions for occupiers and investors worldwide, including leasing, property management, capital markets, valuation, and project management | Real Estate | 🇺🇸 Los Angeles | 609 | 2015 |
| 16 | [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 |
| 17 | [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 |
| 18 | [Pacific Rim Mechanical](https://www.tamtam.ai/c/pacific-rim-mechanical) (prmech.com)<br>Full-service mechanical engineering and HVAC/plumbing contractor in Southern California, offering energy solutions, HVAC controls, and maintenance for various commercial and industrial facilities | Construction | 🇺🇸 San Diego | 473 | 1987 |
| 19 | [ArchKey Solutions/Sprig Electric](https://www.tamtam.ai/c/archkey-solutions-sprig-electric) (archkey.com)<br>A leading specialty trade installation and facilities services company offering design, construction, and maintenance of electrical and technology systems nationwide | Construction | 🇺🇸 San Jose | 390 |  |
| 20 | [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 |
| 21 | [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 |
| 22 | [ENGIE Services North America](https://www.tamtam.ai/c/engie-services-north-america) (engieservices.us)<br>National energy company delivering integrated Energy Effective programs for education, government, commercial, and industrial clients, aiming to drive sustainable results and promote a low-carbon economy | Renewables & Environment | 🇺🇸 Oakland | 182 |  |
| 23 | [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 |
| 24 | [Enovity](https://www.tamtam.ai/c/enovity) (enovity.com)<br>A firm of engineers optimizing facilities to maximize performance, energy efficiency, and sustainability, creating healthier environments for productivity and prosperity | Industrial Machinery Manufacturing | 🇺🇸 San Francisco | 128 | 2002 |
| 25 | [Kennedy Wilson Property Services](https://www.tamtam.ai/c/kennedy-wilson-property-services) (kennedywilsonservices.com)<br>Providing commercial real estate solutions including property management, brokerage, facility management, accounting, construction management, and distressed asset services nationwide | Real Estate | 🇺🇸 Beverly Hills | 57 | 1971 |
| 26 | [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 |
| 27 | [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 |
| 28 | [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 |  |
| 29 | [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

- [Facility management companies in the United States](https://www.tamtam.ai/l/facility-management-companies-united-states) (387)
- [Facility management companies in New York State](https://www.tamtam.ai/l/facility-management-companies-new-york-state) (53)
- [Facility management companies in Texas](https://www.tamtam.ai/l/facility-management-companies-texas) (30)
- [Facility management companies in Florida](https://www.tamtam.ai/l/facility-management-companies-florida) (25)
- [Facility management companies in Pennsylvania](https://www.tamtam.ai/l/facility-management-companies-pennsylvania) (25)

---

Source: https://www.tamtam.ai/l/facility-management-companies-california