# List of Facilities Services companies in Ontario
Tamtam tracks 29 Facilities Services companies headquartered in Ontario. This list ranks all of them by number of employees on LinkedIn, led by BGIS, Dexterra Group and Ainsworth Inc. Their median headcount is 185. Half of them were founded in 1982 or later. The most common headquarters are Mississauga (7), Markham (4) and Toronto (4).
This selection of large Facilities Services companies in Ontario includes businesses specializing in integrated facility management, electrical services, and cleaning solutions. Among them, BGIS is a global leader in integrated facility management, while Dexterra Group provides support services for infrastructure. Ainsworth Inc. offers comprehensive solutions for building maintenance and energy management, and Pattison ID delivers signage and architectural branding.
The companies listed here are primarily large firms, with BGIS employing over 6,000 individuals. A notable trend is the concentration of headquarters in the Greater Toronto Area, including Markham, Mississauga, and Toronto, indicating a regional hub for facilities services.
๐จ๐ฆ Ontario ยท 29 companies ยท Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [BGIS](https://www.tamtam.ai/c/bgis) (bgis.com)
Global leader in integrated facility management services, managing over 50,000 facilities worldwide, including data centers, government and healthcare facilities, and industrial assets | Facilities Services | ๐จ๐ฆ Markham | 6,379 | 1992 |
| 2 | [Dexterra Group](https://www.tamtam.ai/c/dexterra-group) (dexterra.com)
A publicly listed corporation in Canada delivering support services for infrastructure creation, management, and operation, including facilities management and workforce accommodation solutions | Facilities Services | ๐จ๐ฆ Mississauga | 2,774 | |
| 3 | [Ainsworth Inc](https://www.tamtam.ai/c/ainsworth-inc) (ainsworth.com)
Leader in providing comprehensive solutions for installation, maintenance, and energy management of buildings, industrial assets, and processes in North America | Facilities Services | ๐จ๐ฆ Toronto | 1,765 | |
| 4 | [Pattison ID](https://www.tamtam.ai/c/pattison-id) (pattisonid.com)
A leading provider of comprehensive signage solutions, architectural branding, digital signage, and maintenance services with a history of groundbreaking innovations | Facilities Services | ๐จ๐ฆ Pickering | 618 | 1904 |
| 5 | [Spark Power โก](https://www.tamtam.ai/c/spark-power) (sparkpowercorp.com)
A leading independent provider offering electrical services, operations, maintenance, and energy sustainability solutions to various markets in North America | Facilities Services | ๐จ๐ฆ Oakville | 575 | |
| 6 | [Dexterra](https://www.tamtam.ai/c/dexterra) (dexterra.com)
Providing quality solutions for maintenance and operations across various sectors with expertise in service delivery and customer experience transformation | Facilities Services | ๐จ๐ฆ Mississauga | 515 | |
| 7 | [Habib's](https://www.tamtam.ai/c/habib-s)
A Canadian facility management company in Stoney Creek offering green cleaning and building maintenance services, focused on customer satisfaction and sustainability | Facilities Services | ๐จ๐ฆ Stoney Creek | 489 | 2008 |
| 8 | [Precise ParkLink](https://www.tamtam.ai/c/precise-parklink) (preciseparklink.com)
A nationwide urban mobility provider offering parking management services, cutting-edge technology, and full-service solutions across various sectors in Canada | Facilities Services | ๐จ๐ฆ North York | 351 | 1989 |
| 9 | [Hallmark Housekeeping Services Inc.](https://www.tamtam.ai/c/hallmark-housekeeping-services-inc) (hallmarkhousekeeping.com)
A leading Canadian janitorial service provider offering sustainable and innovative solutions in the industry 100% Canadian owned | Facilities Services | ๐จ๐ฆ Toronto | 314 | 1977 |
| 10 | [Clintar Commercial Outdoor Services](https://www.tamtam.ai/c/clintar-commercial-outdoor-services) (clintar.com)
A company with over 50 years of experience providing top-notch landscape maintenance and snow & ice management services to commercial clients | Facilities Services | ๐จ๐ฆ Markham | 301 | 1973 |
| 11 | [TEAM Industrial Services](https://www.tamtam.ai/c/team-industrial-services) (team-group.com)
Leading provider of tailored technical cleaning and facility maintenance services for automotive and manufacturing industries, supporting OEMs & Tier 1s globally | Facilities Services | ๐จ๐ฆ Markham | 290 | 1982 |
| 12 | [Swish Maintenance Limited](https://www.tamtam.ai/c/swish-maintenance-limited) (swish.ca)
Leading distributor of sanitation product solutions, equipment, and services, offering quality cleaning solutions to create clean, safe, and healthy living environments for customers | Facilities Services | ๐จ๐ฆ Peterborough | 286 | 1956 |
| 13 | [Nasittuq Corporation](https://www.tamtam.ai/c/nasittuq-corporation) (nasittuq.com)
The company provides in-service support, facility operations, and maintenance for the North Warning System, along with site management services in Nunavut | Facilities Services | ๐จ๐ฆ Ottawa | 270 | 2000 |
| 14 | [Commercial Cleaning Services](https://www.tamtam.ai/c/commercial-cleaning-services) (commercialcleaningservices.com)
This company in Ontario offers high-quality commercial cleaning services that are efficient, effective, and driven by data, expertise, and customer care | Facilities Services | ๐จ๐ฆ St. Catharines | 233 | 1953 |
| 15 | [JAN-PRO Canada](https://www.tamtam.ai/c/jan-pro-canada) (jan-pro.ca)
Commercial cleaning franchised system in Canada, part of a global network Offers franchise opportunities, specializing in quality cleaning and disinfection services with advanced technologies | Facilities Services | ๐จ๐ฆ Scarborough | 185 | 1995 |
| 16 | [Ontario Refrigeration Service, Inc.](https://www.tamtam.ai/c/ontario-refrigeration-service-inc) (ontref.com)
Specializing in customized maintenance programs for HVAC equipment in the southwestern United States, promoting equipment longevity, efficiency, performance, and early issue detection | Facilities Services | ๐จ๐ฆ Ontario | 184 | |
| 17 | [TEAM Solutions](https://www.tamtam.ai/c/team-solutions) (team-group.com)
Provider of tailored technical cleaning and facility maintenance services for automotive and manufacturing industries, supporting OEMs & Tier 1s with world-class solutions | Facilities Services | ๐จ๐ฆ Aurora | 182 | 1982 |
| 18 | [Toronto Parking Authority](https://www.tamtam.ai/c/toronto-parking-authority) (greenp.com)
This company operates on-street metered parking and off-street parking facilities in Toronto, as well as providing short-term bicycle rentals through Bike Share Toronto | Facilities Services | ๐จ๐ฆ Toronto | 170 | |
| 19 | [Grand River Group](https://www.tamtam.ai/c/grand-river-group) (grandrivergroup.ca)
Professional tree service, landscaping, garden products, and firewood expertise to assist with all outdoor needs in a comprehensive manner | Facilities Services | ๐จ๐ฆ Fergus | 165 | |
| 20 | [Truly Nolen Pest Control](https://www.tamtam.ai/c/truly-nolen-pest-control) (trulynolen.ca)
A leading pest control company in Canada and North America with a history dating back to 1938, focused on residential and commercial pest management services | Facilities Services | ๐จ๐ฆ Mississauga | 159 | 1938 |
| 21 | [Angus Consulting Management Limited](https://www.tamtam.ai/c/angus-consulting-management-limited) (acml.ca)
Leader in facility operations management with over 50 years of experience offering services for various properties across North America | Facilities Services | ๐จ๐ฆ Toronto | 151 | 1970 |
| 22 | [City Clean](https://www.tamtam.ai/c/city-clean) (cityclean.ca)
Since 1972, we have been providing mat rental and washroom supply services to loyal customers in the Greater Toronto Area | Facilities Services | ๐จ๐ฆ Mississauga | 122 | 1972 |
| 23 | [United Services Grp](https://www.tamtam.ai/c/united-services-grp) (unitedservicesgroup.ca)
National industry leader providing high-quality facility maintenance services since 1977, including janitorial, landscaping, and snow removal, with a focus on client satisfaction and trust | Facilities Services | ๐จ๐ฆ Brampton | 114 | 1977 |
| 24 | [Canadian Base Operators Inc.](https://www.tamtam.ai/c/canadian-base-operators-inc) (canadianbaseoperators.com)
Providing tailored facilities management and logistical support services in the Canadian Defence, aviation, and energy sectors for over 25 years | Facilities Services | ๐จ๐ฆ Markham | 106 | 1994 |
| 25 | [Facility Plus](https://www.tamtam.ai/c/facility-plus) (facilityplus.com)
Facility Plus offers comprehensive facility cleaning, maintenance, and repair services across North America, including janitorial services, electrical, plumbing, locksmith, and painting services | Facilities Services | ๐จ๐ฆ Mississauga | 44 | 1987 |
| 26 | [NaceCare Solutions](https://www.tamtam.ai/c/nacecare-solutions) (nacecare.com)
Provider of high-quality systems and equipment for the commercial and industrial cleaning industry, offering reliability, innovation, and a focus on customer needs | Facilities Services | ๐จ๐ฆ Mississauga | 44 | 1985 |
| 27 | [Berg Industrial Service Inc.](https://www.tamtam.ai/c/berg-industrial-service-inc) (bergservice.com)
Specializing in industrial refrigeration system design, installation, repair, and maintenance across North America, including cold storage warehouses, production facilities, and ice rinks | Facilities Services | ๐จ๐ฆ Mississauga | 35 | 1973 |
| 28 | [Perry Mechanical Inc](https://www.tamtam.ai/c/perry-mechanical-inc) (perryfuels.com)
An energy services business dedicated to meeting the needs of residential and business customers with innovative products and superior customer service | Facilities Services | ๐จ๐ฆ Oshawa | 13 | |
| 29 | [Spenergy Certified Solutions](https://www.tamtam.ai/c/spenergy-certified-solutions) (spenergycertified.com)
An Energy Service Provider specializing in identifying and resolving energy inefficiencies for commercial and industrial clients through customized solutions and maximizing government rebates | Facilities Services | ๐จ๐ฆ Kitchener | 3 | 2018 |
## 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 Ontario
- [The largest companies in Ontario](https://www.tamtam.ai/l/largest-companies-ontario) (5,032)
- [Multinational companies in Ontario](https://www.tamtam.ai/l/multinational-companies-ontario) (901)
- [Financial services firms in Ontario](https://www.tamtam.ai/l/financial-services-firms-ontario) (396)
- [Manufacturers in Ontario](https://www.tamtam.ai/l/manufacturers-ontario) (389)
- [Critical infrastructure operators in Ontario](https://www.tamtam.ai/l/critical-infrastructure-operators-ontario) (344)
- [Retail chains in Ontario](https://www.tamtam.ai/l/retail-chains-ontario) (327)
- [Companies with in-house R&D in Ontario](https://www.tamtam.ai/l/r-and-d-companies-ontario) (300)
- [Logistics companies in Ontario](https://www.tamtam.ai/l/logistics-companies-ontario) (285)
- [Education providers in Ontario](https://www.tamtam.ai/l/education-companies-ontario) (276)
- [SaaS companies in Ontario](https://www.tamtam.ai/l/saas-companies-ontario) (275)
- [Truck Transportation companies in Ontario](https://www.tamtam.ai/l/truck-transportation-companies-ontario) (270)
- [Transportation, Logistics, Supply Chain and Storage companies in Ontario](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-ontario) (261)
- [Public sector organisations in Ontario](https://www.tamtam.ai/l/public-sector-organisations-ontario) (259)
- [Financial Services companies in Ontario](https://www.tamtam.ai/l/financial-services-companies-ontario) (250)
- [IT Services and IT Consulting companies in Ontario](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-ontario) (235)
- [Software Development companies in Ontario](https://www.tamtam.ai/l/software-development-companies-ontario) (231)
- [Healthcare providers in Ontario](https://www.tamtam.ai/l/healthcare-providers-ontario) (226)
- [Hardware manufacturers in Ontario](https://www.tamtam.ai/l/hardware-companies-ontario) (213)
- [Professional services firms in Ontario](https://www.tamtam.ai/l/professional-services-firms-ontario) (211)
- [Hospitals and Health Care companies in Ontario](https://www.tamtam.ai/l/hospitals-and-health-care-companies-ontario) (205)
- [Distributors and wholesalers in Ontario](https://www.tamtam.ai/l/distributors-and-wholesalers-ontario) (183)
- [Companies with a mobile app in Ontario](https://www.tamtam.ai/l/companies-with-mobile-app-ontario) (181)
- [Publicly traded companies in Ontario](https://www.tamtam.ai/l/publicly-traded-companies-ontario) (156)
- [IT services companies in Ontario](https://www.tamtam.ai/l/it-services-companies-ontario) (156)
## The same list elsewhere in Canada
- [Facilities Services companies in Canada](https://www.tamtam.ai/l/facilities-services-companies-canada) (56)
---
Source: https://www.tamtam.ai/l/facilities-services-companies-ontario