sam.directory home Get Started
Active registration

H & D Mechanical LLC

Upper Marlboro, MD

General information for H & D Mechanical LLC

Physical address
7703 Crain Hwy, Upper Marlboro, Md, 20772
Mailing address
7703 Crain Hwy, Upper Marlboro, MD, 20772

Points of contact for H & D Mechanical LLC

SAM.gov Points of Contact

ERIK HARLEY HARLEY
Government Business POC Electronic Business POC
7703 CRAIN HIGHWAY, Upper Marlboro, MD, 20772
SEAN DUFFY
Alternate Government Business POC Alternate Electronic Business POC
7703 CRAIN HIGHWAY, UPPER MARLBORO, MD, 20772

Additional contact details may be available

NAICS codes for H & D Mechanical LLC

Code Description Small Business
238220 PRIMARY Plumbing, Heating, and Air-Conditioning Contractors Yes
237110 Water and Sewer Line and Related Structures Construction Yes

Update history

1 change(s) tracked
Feb 20, 2026
NAICS 238220: small-business status No → Yes
Subscribe to see every tracked change to this contractor's registration, codes and certifications.