Major Employers

To join the list of major employers with 250 employees or more, please contact us.

Company Industry Employees
Fort Detrick Campus* Army, NCI, and other tenants 10,200
Frederick County Public Schools Public Education 6,585
Frederick Health Comprehensive Health Care 3,275
Frederick County Government County Government 2,396
Leidos Biomed / Frederick National Lab Medical Research 2,341
Frederick Community College  Two-Year College 1,251
Thermo Fisher Scientific Life Sciences Research 950
City of Frederick Government Municipal Government 841
AstraZeneca BioTech Manufacturing 750
Costco Wholesale Wholesale Distribution Center and E-commerce Center 725
Mount Saint Mary’s University Four-Year University 682
Legal & General America Life Insurance Headquarters 638
NVR, Inc. Home Building and Mortgage Banking 630
Aldi Distribution Center and Retail Retail Supermarket & Distribution 475
Lonza Biological Products 464
YMCA of Frederick County Recreation and Sports Center 445
STULZ Air Technology Systems, Inc. Manufacturer, Commercial Air Conditioners and Dehumidifiers 430
Shepherd Pratt/Way Station Outpatient Mental Health 412
National Emergency Training Center  US Fire Academy, FEMA, and other tenants 400
 Plamondon Hospitality Companies Hospitality (Hotels, Restaurants, and Restaurant Management) 390
Music & Arts Music Retailer and Headquarters 396
Pleasants Construction, Inc. Construction and Paving 385
Kite Pharma Life Science 350
RR Donnelley Business Documents 350
Maryland School for the Deaf Educational Institution 320
Cian Diagnostics Diagnostic Testing 300
Fitzgerald Auto Mall Frederick Auto Dealership 300
R.W. Warner Construction/Trade Contractor 300
Wright Manufacturing Lawn Maintenance Technology 283
Morgan-Keller Construction General Contractors 281
Homewood Retirement Centers Retirement Community 275
Hood College Four-Year College 250

*Includes military personnel, contractors and offsite annex
Last updated 1/2023