Hart Jonathan D

Company facts

Self-certified in SAM.gov

• For Profit Organization

Entity structure

Sole Proprietorship

Other NAICS codes in SAM.gov

• 541611 Administrative Management and General Management Consulting Services
• 541720 Research and Development in the Social Sciences and Humanities
• 611710 Educational Support Services
• 624230 Emergency and Other Relief Services
• 921190 Other General Government Support
• 922160 Fire Protection

SAM.gov registration date

May 6, 2004

Physical address

7792 Baltimore National Pike, Frederick, MD 21702, USA

Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated Nov 10, 2025.