- Sand Gravel & Aggregate, Port Sydney
- Sandblasting, Port Sydney - General Contractors
- Scrap & Waste Materials, Port Sydney
- Secondary Schools, Port Sydney
- Secretarial & Court Reporting Services, Port Sydney
- Security Alarm Systems - Home & Business, Port Sydney
- Security Control Systems & Monitoring, Port Sydney - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Port Sydney
- Senior Citizens Housing, Port Sydney
- Septic Tank Pumping & Cleaning, Port Sydney - Septic Systems
- Sheet Metal Contractors, Port Sydney - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Port Sydney
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- Shopping & Shopping Services, Port Sydney
- Siding Contractors, Port Sydney - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Snack Foods, Port Sydney
- Social Services & Welfare, Port Sydney
- Sod & Sodding Service, Port Sydney
- Specialty Animal Services, Port Sydney
- Specialty Stores, Port Sydney
- Stoves & Furnace Equipment, Port Sydney - Fittings & Repair Parts
- Surveyor Services, Port Sydney - Surveying Service
- Swimming Pool, Sauna & Spa Contractors, Port Sydney
- Swimming Pools Contractors, Port Sydney - Install Inground - Above Ground Pools
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