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 7,368
Frederick Health Comprehensive Health Care 3,300
Frederick County Government County Government 2,563
Leidos Biomed / Frederick National Lab Medical Research 2,440
Frederick Community College  Two-Year College 1,313
City of Frederick Government Municipal Government 905
Thermo Fisher Scientific Life Sciences Research 766
AstraZeneca BioTech Manufacturing 725
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
Lonza Biological Products 561
Aldi Distribution Center and Retail Retail Supermarket & Distribution 552
Kite Pharma Life Sciences 510
YMCA of Frederick County Recreation and Sports Center 450
STULZ Air Technology Systems, Inc. Manufacturer, Commercial Air Conditioners and Dehumidifiers 430
National Emergency Training Center  US Fire Academy, FEMA, and other tenants 400
Music & Arts Music Retailer and Headquarters 396
Plamondon Hospitality Companies Hospitality (Hotels, Restaurants, and Restaurant Management) 390
Sheppard Pratt Outpatient Mental Health 376
Pleasants Construction, Inc. Construction and Paving 360
RR Donnelley Business Documents 350
Maryland School for the Deaf Educational Institution 320
Fitzgerald Auto Mall Frederick Auto Dealership 307
Cian Diagnostics Diagnostic Testing 300
R.W. Warner Construction/Trade Contractor 300
Wright Manufacturing Lawn Maintenance Technology 283
Homewood Retirement Centers Retirement Community 280
Navistar Direct Marketing Printing Manufacturer 280
Morgan-Keller Construction General Contractors 268
Hood College Four-Year College 251

*Includes military personnel, contractors and offsite annex
Last updated 7/2023