Sentry LLC

Company facts

Self-certified in SAM.gov

• For Profit Organization

Entity structure

Partnership or Limited Liability Partnership

Other NAICS codes in SAM.gov

• 236210 Industrial Building Construction
• 237110 Water and Sewer Line and Related Structures Construction
• 237120 Oil and Gas Pipeline and Related Structures Construction
• 237130 Power and Communication Line and Related Structures Construction
• 237310 Highway, Street, and Bridge Construction
• 237990 Other Heavy and Civil Engineering Construction
• 238110 Poured Concrete Foundation and Structure Contractors
• 238120 Structural Steel and Precast Concrete Contractors

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• 238140 Masonry Contractors
• 238190 Other Foundation, Structure, and Building Exterior Contractors
• 238210 Electrical Contractors and Other Wiring Installation Contractors
• 238220 Plumbing, Heating, and Air-Conditioning Contractors
• 238290 Other Building Equipment Contractors
• 238910 Site Preparation Contractors
• 238990 All Other Specialty Trade Contractors
• 321991 Manufactured Home (Mobile Home) Manufacturing
• 321992 Prefabricated Wood Building Manufacturing
• 321999 All Other Miscellaneous Wood Product Manufacturing
• 332312 Fabricated Structural Metal Manufacturing
• 332322 Sheet Metal Work Manufacturing
• 332710 Machine Shops
• 332919 Other Metal Valve and Pipe Fitting Manufacturing
• 332996 Fabricated Pipe and Pipe Fitting Manufacturing
• 332999 All Other Miscellaneous Fabricated Metal Product Manufacturing
• 333132 Oil and Gas Field Machinery and Equipment Manufacturing
• 335313 Switchgear and Switchboard Apparatus Manufacturing

SAM.gov registration date

Mar 26, 2020

Physical address

1928 Calvin Dr, Watertown, SD 57201, USA

Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated Apr 13, 2026.