Major employers in Sarnia

9 employers, 1 of them head offices: 1 worldwide, 0 national and 0 regional. Headcounts are for the site here, with the page that publishes them.

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

Employers9
Worldwide HQ1
National HQ0
Regional HQ0
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
Bluewater Power DistributionUtilities — electric power distributionWorldwide HQglobal (electricity distributor for the Sarnia-Lambton area; head office in Sarnia)—Sarnia, OntarioCareers →
ARLANXEO — Sarnia plantChemical manufacturing — synthetic rubberpart of ARLANXEO (wholly owned by Aramco)Major site—The Hague, NetherlandsCareers →
Bluewater HealthHealth care — acute-care hospitalMajor site—Sarnia, OntarioCareers →
City of SarniaPublic administration — municipal governmentMajor site—Sarnia, OntarioCareers →
County of LambtonPublic administration — county governmentMajor site—Wyoming, OntarioCareers →
Imperial Oil — Sarnia sitePetroleum refining and petrochemicalspart of Imperial Oil (majority-owned by ExxonMobil)Major site—Calgary, AlbertaCareers →
Lambton CollegeEducation — college of applied arts and technologyMajor site—Sarnia, OntarioCareers →
Lambton Kent District School BoardEducation — elementary and secondary schoolsMajor site—Sarnia, OntarioCareers →
NOVA Chemicals — Sarnia operating centre and Sarnia-Lambton productionChemical manufacturing — polyethylene and petrochemicalspart of NOVA Chemicals (owned by Mubadala)Major site—Calgary, AlbertaCareers →
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Notes on this record

  • Sarnia-Lambton Economic Partnership (sarnialambton.on.ca) publishes no current numbered top-employer list on its data pages; the 2020 SLEP employer sheet that press and search engines cite now returns 404. The City of Sarnia's 2020 investment profile names major employers without headcounts, so most rows have no number.
  • From the 2020 profile, not added: SNC-Lavalin (now AtkinsRéalis) and Worley — their own sites were not checked for a Sarnia office in this pass; Steeves & Rozema Group (steevesrozema.com robots.txt unreachable, treated as disallowed).
  • Much of 'Chemical Valley' lies outside the City: Shell's Corunna refinery and NOVA's Corunna/Moore sites are in St. Clair Township; the County of Lambton's head office is in Plympton-Wyoming. The St. Clair Catholic DSB head office is in Wallaceburg (Chatham-Kent), so it is not listed here.
  • Blocked or skipped: suncor.com (robots.txt 403, treated as disallowed — so no Suncor Sarnia refinery row); sarniapolice.ca (robots 'Disallow: /'); bioindustrial.ca (Bioindustrial Innovation Canada; robots unreachable).
  • No venture-funded software/tech company headquartered in Sarnia could be confirmed; the area's funding news is government money for Bioindustrial Innovation Canada and Lambton College research.
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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.