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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 6,379 | ||||
| 2 |
Dexterra Groupdexterra.com
A publicly listed corporation in Canada delivering support services for infrastructure creation, management, and operation, including facilities management and workforce accommodation solutions |
2,774 | |||
| 3 |
Ainsworth Incainsworth.com
Leader in providing comprehensive solutions for installation, maintenance, and energy management of buildings, industrial assets, and processes in North America |
1,765 | |||
| 4 |
Pattison IDpattisonid.com
A leading provider of comprehensive signage solutions, architectural branding, digital signage, and maintenance services with a history of groundbreaking innovations |
618 | |||
| 5 |
Spark Power ⚡sparkpowercorp.com
A leading independent provider offering electrical services, operations, maintenance, and energy sustainability solutions to various markets in North America |
575 | |||
| 6 |
Dexterradexterra.com
Providing quality solutions for maintenance and operations across various sectors with expertise in service delivery and customer experience transformation |
515 | |||
| 7 |
Habib's
A Canadian facility management company in Stoney Creek offering green cleaning and building maintenance services, focused on customer satisfaction and sustainability |
489 | |||
| 8 |
Precise ParkLinkpreciseparklink.com
A nationwide urban mobility provider offering parking management services, cutting-edge technology, and full-service solutions across various sectors in Canada |
351 | |||
| 9 |
Hallmark Housekeeping Services Inc.hallmarkhousekeeping.com
A leading Canadian janitorial service provider offering sustainable and innovative solutions in the industry 100% Canadian owned |
314 | |||
| 10 |
Clintar Commercial Outdoor Servicesclintar.com
A company with over 50 years of experience providing top-notch landscape maintenance and snow & ice management services to commercial clients |
301 | |||
| 11 |
TEAM Industrial Servicesteam-group.com
Leading provider of tailored technical cleaning and facility maintenance services for automotive and manufacturing industries, supporting OEMs & Tier 1s globally |
290 | |||
| 12 |
Swish Maintenance Limitedswish.ca
Leading distributor of sanitation product solutions, equipment, and services, offering quality cleaning solutions to create clean, safe, and healthy living environments for customers |
286 | |||
| 13 |
Nasittuq Corporationnasittuq.com
The company provides in-service support, facility operations, and maintenance for the North Warning System, along with site management services in Nunavut |
270 | |||
| 14 |
Commercial Cleaning Servicescommercialcleaningservices.com
This company in Ontario offers high-quality commercial cleaning services that are efficient, effective, and driven by data, expertise, and customer care |
233 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 15 |
JAN-PRO Canadajan-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 |
185 | |||
| 16 |
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 |
184 | |||
| 17 |
TEAM Solutionsteam-group.com
Provider of tailored technical cleaning and facility maintenance services for automotive and manufacturing industries, supporting OEMs & Tier 1s with world-class solutions |
182 | |||
| 18 |
Toronto Parking Authoritygreenp.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 |
170 | |||
| 19 | 
Grand River Groupgrandrivergroup.ca
Professional tree service, landscaping, garden products, and firewood expertise to assist with all outdoor needs in a comprehensive manner |
165 | |||
| 20 |
Truly Nolen Pest Controltrulynolen.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 |
159 | |||
| 21 |
Angus Consulting Management Limitedacml.ca
Leader in facility operations management with over 50 years of experience offering services for various properties across North America |
151 | |||
| 22 |
City Cleancityclean.ca
Since 1972, we have been providing mat rental and washroom supply services to loyal customers in the Greater Toronto Area |
122 | |||
| 23 |
United Services Grpunitedservicesgroup.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 |
114 | |||
| 24 |
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 |
106 | |||
| 25 |
Facility Plusfacilityplus.com
Facility Plus offers comprehensive facility cleaning, maintenance, and repair services across North America, including janitorial services, electrical, plumbing, locksmith, and painting services |
44 | |||
| 26 |
NaceCare Solutionsnacecare.com
Provider of high-quality systems and equipment for the commercial and industrial cleaning industry, offering reliability, innovation, and a focus on customer needs |
44 | |||
| 27 |
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 |
35 | |||
| 28 |
Perry Mechanical Incperryfuels.com
An energy services business dedicated to meeting the needs of residential and business customers with innovative products and superior customer service |
13 | |||
| 29 |
Spenergy Certified Solutionsspenergycertified.com
An Energy Service Provider specializing in identifying and resolving energy inefficiencies for commercial and industrial clients through customized solutions and maximizing government rebates |
3 | |||
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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.
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