Major employers in Markham

31 employers, 22 of them head offices: 11 worldwide, 10 national and 1 regional. Headcounts are for the site here, with the page that publishes them.

Markham — the /local page · Who owns Markham · Who represents Markham · Companies

Employers31
Worldwide HQ11
National HQ10
Regional HQ1
1

Employers, largest first

People employed at the site in this city where a source publishes it; head offices without a published count follow.

CompanyHereEmployees hereWorldwide HQJobs
BGISIntegrated facilities managementWorldwide HQglobal—Markham, OntarioCareers →
Enercare Inc.Home services — HVAC, water heaters, plumbingWorldwide HQglobal—Markham, OntarioCareers →
Exact Imaging Inc.Medical technology — micro-ultrasound imagingWorldwide HQglobal—Markham, OntarioCareers →
Extendicare Inc.Health care — long-term care and home health careWorldwide HQglobal—Markham, Ontario—
HomeLife Landmark Realty Inc.Real estate brokerageWorldwide HQglobal—Markham, OntarioCareers →
Jonas SoftwareSoftware — vertical-market software holding grouppart of Constellation Software Inc.Worldwide HQglobal (Jonas operating group)—Markham, OntarioCareers →
NordSpace Corp.Aerospace — launch vehicles, engines, spaceportWorldwide HQglobal—Markham, OntarioCareers →
Pathway CommunicationsTechnology — managed IT, cybersecurity, network servicesWorldwide HQglobal—Markham, OntarioCareers →
Sienna Senior Living Inc.Health care — seniors' living and long-term careWorldwide HQglobal—Markham, OntarioCareers →
TeraGo Inc.Telecommunications — business internet, SD-WAN, private 5GWorldwide HQglobal—Markham, Ontario (Thornhill)Careers →
The Miller GroupConstruction — road building, paving, transit, wasteWorldwide HQglobal—Markham, OntarioCareers →
Allstate Insurance Company of CanadaInsurance — property and casualtypart of The Allstate CorporationNational HQCanada—Northbrook, IllinoisCareers →
Aviva CanadaInsurance — property and casualtypart of Aviva plcNational HQCanada—London, United KingdomCareers →
Combined Insurance Company of America (Canada)Insurance — accident, health and lifepart of Chubb LimitedNational HQCanada—Zurich, SwitzerlandCareers →
Galderma Canada Inc.Dermatology — pharmaceuticals and skincarepart of Galderma Group AGNational HQCanada—Zug, SwitzerlandCareers →
Hallmark CanadaGreeting cards and gifts — distributionpart of Hallmark Cards, Inc.National HQCanada—Kansas City, MissouriCareers →
Honda Canada Inc.Automotive — vehicle distribution (national head office)part of Honda Motor Co., Ltd.National HQCanada—Tokyo, JapanCareers →
Hyundai Auto Canada Corp.Automotive — vehicle and parts distributionpart of Hyundai Motor CompanyNational HQCanada—Seoul, South Korea—
IBM Canada Ltd.Technology — software lab, IT servicespart of IBMNational HQCanada—Armonk, New YorkCareers →
Kubota Canada Ltd.Farm, construction and turf equipment — distributionpart of Kubota CorporationNational HQCanada—Osaka, JapanCareers →
Shiseido (Canada) Inc.Cosmetics and skincare — distributionpart of Shiseido Company, LimitedNational HQCanada—Tokyo, JapanCareers →
CAA South Central OntarioMember services — roadside assistance, insurance, travelRegional HQSouth Central Ontario—Markham, OntarioCareers →
Astera Labs (Markham Research and Design Centre)Semiconductors — connectivity chips for AI data centrespart of Astera Labs, Inc.Major site—San Jose, California—
CGI Information Systems and Management Consultants Inc.Technology — IT services and consultingpart of CGI Inc.Major site—Montreal, QuebecCareers →
City of MarkhamMunicipal governmentMajor site—Markham, OntarioCareers →
Genesys Laboratories Canada Inc.Software — cloud contact-centre platformpart of Genesys Cloud Services, Inc.Major site—Menlo Park, CaliforniaCareers →
Nielsen (The Nielsen Company of Canada)Market research and audience measurementpart of Nielsen HoldingsMajor site—New York, New YorkCareers →
Oak Valley Health (Markham Stouffville Hospital)Health care — community hospitalMajor site—Markham, OntarioCareers →
Seneca Polytechnic (Markham Campus)Post-secondary educationMajor site—Toronto, OntarioCareers →
TD Bank Group (TD Insurance, TD Waterhouse)Banking, insurance and brokerage operationspart of The Toronto-Dominion BankMajor site—Toronto, OntarioCareers →
WSP Canada Inc.Engineering and professional servicespart of WSP Global Inc.Major site—Montreal, QuebecCareers →
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Notes on this record

  • Markham's Top 10 Employers (Economic Profile 2026, from the 2024 York Region Employment Survey), unranked and without headcounts: TD Bank Financial Group, AMD Technologies Inc., CGI Information Systems, Aviva Canada, Homelife Landmark Realty, Saint Elizabeth Health Care, Limen Group, Allstate Insurance Company of Canada, Camp Green Acres, CAA Club Group.
  • York Region publishes only employee RANGES per location (1-4 … 500+), never a count, so employeesHere is null throughout; the range is quoted in employeesNote. 22 Markham locations were in the 500+ range in 2024.
  • INCOMPLETE — the run was stopped early to save credits. Not yet verified on own sites (so left out): TD (TD Insurance, TD Waterhouse — 500+), AMD (amd.com robots.txt unreachable), CGI (cgi.com/en/canada 404), Nielsen (500+), Autoliv/Veoneer, GE Grid IQ, BGIS, WSP, Markham Stouffville Hospital / Oak Valley Health (500+), Saint Elizabeth Health Care (sehc.com disallowed by robots.txt), Limen Group, Metroland. Head-office flags still to verify: Huawei Canada (huawei.com disallowed), Toshiba Canada, Kubota Canada, Shiseido Canada, Smucker Foods of Canada, Hallmark Canada, Galderma Canada, Johnson & Johnson Inc., Pet Valu (Cloudflare challenge), Jonas Software, TeraGo, Morrison Hershfield, Medical Pharmacies Group, AT&T Global Services Canada, Beghelli Canada, Neopost, Worldsource. Also: Lenovo Canada (lenovo.com 403), Real Matters (403), Aviva's avivacanada.com robots unreachable (aviva.ca used).
  • The York Region directory is self-reported and some entries are stale (e.g. D+H, PowerStream, Morneau Shepell under old names); head-office flags were used only alongside the company's own site.
  • Allstate, Hyundai, Enercare, Sienna and CAA SCO: the company's own site was opened and is the company, but its Markham head office rests on the York Region survey's head-office flag, not on a company page.
  • 2026-10-30 deepen pass: services1.arcgis.com/robots.txt now answers 403, so the FeatureServer was not queried again; the same 2024 directory was read as one CSV from York Region's open-data hub (robots allows it). Ranges only, so employeesHere stays null.
  • 2026-10-30 funded-tech search: Markham has few venture-backed HQs that can be proven from a company's own site. Checked and LEFT OUT: Delos Data (US$100M+ Series A, Sept 2026 — its own release is datelined Palo Alto and its open roles are in Palo Alto; aggregators list Markham); Mecka AI (US$60M — reported as New York-based; its site names no Markham office); Blumind (C$20M Series A — its site gives Ottawa); Snappy (snappy.com is a New York gifting company, not the Markham restaurant-software startup a YorkLink headline mentions); Sangoma Technologies (contact page lists no Markham office); Granum/LMN (site gives Atlanta and Toronto offices); NordSpace has only government grants, so no funding field.
  • 2026-10-30 blocked/unreachable (recorded, not bypassed): extendicare.com robots.txt names ClaudeBot (Disallow /) — earlier Extendicare facts kept; services1.arcgis.com robots.txt 403; amd.com, toshiba.ca, medicalpharmacies.com, careers.hyundaicanada.com and lumiracapital.com did not answer robots.txt (connection errors); lenovo.com, petvalu.ca, realmatters.com robots 403; huawei.com robots disallows /ca/; careers.sehc.com (Saint Elizabeth) unreachable; cgi.com/en/canada answered 'Access denied'; seedtable.com and globalventuring.com robots disallow us; markham.startupblink.com DNS failure. Hyundai Canada's careers page was not found on its site, so it has no careersUrl.
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Sources

Prepared 2026-10-30. Each headcount links to the page it is read from; each company to its own site or its /company page.