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S
- Saber Power Services LLC
- Safe Haven Enterprises
- Safety Council Southwest Louisiana
- Safety Management Systems
- Safetypro Resources LLC
- Safety Solutions & Supply
- SafeZone Safety Systems
- Sam Carbis Solutions Group, LLC
- Samuel Son & Co Inc
- Sasol Chemicals (USA) LLC
- Satellite Shelters Inc
- Savage
- Scott-Macon Equipment
- Securitas Critical Infrastructure Services
- Sefar Inc
- SEMS Inc
- Service Radio - Industrial Blind Solutions
- Setpoint Integrated Solutions
- Settoon Towing
- SFG Industrial LLC
- SGS Petroleum Service Corporation
- Shell Chemical Company LP
- Shell Norco Chemical Plant
- Shintech Louisiana, LLC
- Sigma Engineers & Constructors Inc
- Signal Two-Way Radio Rentals
- Sign King LLC
- Simmons Railroad Group LLC
- Simon Roofing and Sheet Metal Corporation
- Sirius Technical Services
- SJB Group LLC
- Smith Tank & Steel Inc
- SNF Flopam
- Solvay
- Sorrento Lumber & Concrete Co Inc
- Southern Ionics Incorporated
- Southern Packaging Inc
- Southern Recycling, EMR
- Southern Solid Waste LLC
- Southern Strategy Group
- Southland Fire & Safety Equipment
- Southside Machine Works
- Southwest LA/ Lake Charles Convention & Visitors Bureau
- Southwest Stainless
- Spears & Gary LLC
- Specialized Industrial Maintenance Inc
- Specialty Welding & Turnarounds (SWAT)
- SpectroChem
- Spectrum Water Technology
- Spradley & Spradley Inc
- Springhill Suites Baton Rouge North
- Sprint Safety
- Sprint Waste Services LP
- Sprung Instant Structures
- Standard Crane & Hoist LLC
- S.T.A.R. Concrete Pumping Co Inc
- Star Service Inc - BR
- Star Service Inc - St.Rose
- Statehouse Strategy LLC
- Steam & Process Repairs
- Steel Fabricators of Monroe LLC
- St. Elizabeth Hospital
- St. Elizabeth Occupational Health Clinic
- Steven P. Pereira, CSP
- Stewart Construction LLC
- STI Group
- Stockwell, Sievert, Viccellio, Clements & Shaddock, LLP
- Stranco LLC
- Structural
- STS Industrial Inc
- Sulphur Electric Co Inc
- SumIt Credits LLC
- Summit Electric Supply
- Sun Industrial Group LLC
- Superheat FGH
- Superior Supply & Steel
- SWS Environmental Services
- SYCON International LLC
- Syngenta Crop Protection, LLC
- Syntech Towers LLC