- Scrap & Waste Machinery, Keeseville
- Scrap & Waste Materials, Keeseville
- Screen Printing, Keeseville
- Secondary Schools, Keeseville
- Security & Surveillance System & Equipment, Keeseville
- Security Services, Keeseville
- Senior Citizens Service & Health Organizations, Keeseville
- Septic Tank Installation & Repair, Keeseville - Septic Systems
- Septic Tank Pumping & Cleaning, Keeseville - Septic Systems
- Septic Tanks & Septic Systems Contractors, Keeseville - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Sewage Treatment Plant Contractors, Keeseville
- Sheet Metal Contractors, Keeseville - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Keeseville
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- Shopping & Shopping Services, Keeseville
- Siding Contractors, Keeseville - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Sightseeing Tours, Keeseville
- Snacks & Desserts, Keeseville
- Social Services & Welfare, Keeseville
- Societies & Foundation Associations, Keeseville
- Solar Energy Companies - Contractors, Keeseville - Solar Panel Installation - Solar Power Systems
- Solar Energy Equipment & Systems - Service & Repair, Keeseville - Solar Power Systems
- Solar Energy Research Development & Design, Keeseville
- Specialty Stores, Keeseville
- State Government, Keeseville
- Stone, Keeseville
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