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100 North Main Street
O'Fallon, MO 63366
Phone: 636-379-5532
Email: econdev@ofallon.mo.us

©2018-2019 City of O'Fallon, Missouri
 

Largest Employers

T

he most populous city in St. Charles County, O’Fallon is also home to some of the area’s largest employers. Listed below are the 25 largest private sector* employers in O’Fallon, Missouri.

 BusinessProduct or ServiceEmployees
1MastercardGlobal technology headquarters3,815
2CitiFinancial services2,400
3True ManufacturingFreezers and commercial coolers manufacturerN/A
4SAK ConstructionPipe rehabilitation and tunneling contractor505
5Progress West HospitalMedical services425
6MEMCSilicon water manufacturer355
7AldiWarehouse and distribution310
8CarShield (NRRM)Marketing and sales of service contracts300
9SynergenticsSurgical instruments and supplies270
10Air Evac LifeteamCorporate headquarters for medical air transportation250
11Allianz Global Corporate & SpecialtyCorporate and specialty insurance company250
12Cosmos CorporationPet care products manufacturer230
13Nortek Global HVACHeating and cooling components190
14O'Fallon CastingNon-ferrous investment casting foundry170
15The Phoenix GroupPOS equipment technology150
16Schneider ElectricComputer hardware and software140
17Boeing Distribution ServicesAerospace fasteners supplier130
18VSM AbrasivesSandpaper manufacturer130
19McKesson CorporationPharmaceutical wholesaler115
20River City DrywallResidential/commercial drywall installation, taping and painting115
21Component Bar ProductsPrecision machine manufacturer110
22Mid America PeterbiltPeterbilt heavy duty truck dealership110
23Drug PackageDrug labels, forms, bags and product manufacturer105
24True Fitness TechnologyFitness equipment manufacturer and distributor100
25Vitro Automotive GlassAutomotive glass supplier100

Source:  City of O’Fallon Economic Development Department

* Progress West Hospital is part of the non-profit BJC Heathcare system.

Manufacturing Firms

Manufacturing Firms

Manufacturing Firms

Headquarters & Operations

Headquarters & Operations

Headquarters & Operations

International Firms

International Firms

International Firms