- 5 Star Energy
- 5D Solutions, Inc.
- 6 Rivers Construction Inc.
- A & I Roofing Inc.
- A.F.P. Sprinklers Inc.
- A.T.C
- Adams Commercial General Contracting Inc.
- Advanced Security Systems
- Air Tight
- Allpoints Advertising, Inc
- Alves Inc.
- An Electrician Inc.
- Anderson Lucas Somerville & Borges LLP
- Barry Smith Construction
- Bay Tank & Boiler Works dba BT Metals
- Beacom Construction Co.
- Bell Hardware
- Bob Downing Electric
- Bode Construction
- Brant Electric
- Burgess Electric
- Cal Poly Humboldt
- Cal-Ore Life Flight
- Caledonia Plumbing
- California Heating & Sheet Metal
- Campton Electric Supply
- Carbonneau Ceramic Tile Inc.
- Carpenter’s Local #751
- Carpet Depot
- CDH Painting
- Chance Hart Trucking & Excavation
- Cher-Ae Heights Indian Community of the Trinidad Rancheria
- Chris Lehto Electric
- City of Arcata
- Clear Cloud Solutions, dba Whitson Inc.
- Coast Central Credit Union
- Colburn Electric
- Coldwell Banker Commercial Pacific Partners
- Coldwell Banker/Cutten Realty
- College of the Redwoods
- Communications Cabling Systems Inc.
- Cornerstone Construction Co.
- Cummins Pacific LLC
- Danco Builders Northwest
- Danielson Construction Inc.
- DC Excavation LLC
- DCI Builders
- Dolcini Land Clearing
- Don’s Rent All
- EBA Engineering
- Edwards Excavation and Restoration
- Eel River Transportation & Salvage
- Ellena Construction
- Eureka Floor Carpet One
- Eureka Glass Company Inc.
- Eureka Ready Mix Concrete Company Inc.
- Evans Mechanical
- Excel Heating and Cooling
- Express Employment Professionals
- F.C. Bickert Lath & Plaster Inc.
- Fenton Construction Services
- Figas Construction
- Firestop Co.
- First Service Plumbing & Heating
- Fisch Drilling & Pump, Inc.
- Forbes Cabinets
- Forbusco Lumber
- Fortuna Iron (FOI)
- Frank Zabel Trucking
- Frank’s Heating & Refrigeration
- George J Kurwitz
- George Petersen Insurance Agency
- GR Sundberg Inc.
- GR Wilcox Enterprises Inc.
- Granite Construction
- Greenway Partners
- Greenwired
- Gulfeagle Supply
- Guzi West Inspection and Consulting
- Hall’s Excavation
- Hamanaka Painting Co.
- Harbers Insurance Agency Inc.
- Hemmingsen Contracting Company Inc.
- Hemmingsen Pavement Solutions
- Hensell Materials
- Heryford Electric & Communications
- Hilfiker Pipe Company
- Hooven & Co. Inc.
- Hooven and Reese, Inc.
- Humboldt Countertops and Surfacing
- Humboldt County Department of Public Works
- Humboldt County Office of Education
- Humboldt Electric
- Humboldt Fasteners & Tools Inc.
- Humboldt Fence
- Humboldt Motorsports
- Humboldt Moving & Storage Co.
- Industrial Electric Arcata Inc.
- J. B. Steel Inc.
- J&G Lawn and Garden
- JDS Construction, Inc.
- JNG Insulation
- JNM Construction
- John H. Kruger Plastering & Drywall
- John’s Excavating
- Johnny’s Flooring & Window Coverings
- Johns’ Group LLC
- JZ Contracting Inc.
- K. Harrison Construction Inc.
- KB Excavation, LLC
- Keenan Supply (HAJOCA)
- KelCo Construction, LLC
- Kelly-O’Hern Associates
- Kernen Construction
- Kramer Properties Inc.
- KTS Construction
- LACO Associates
- Leonardo Builders, Inc.
- Lewis Land Development, Inc.
- Lindstrom Construction Inc.
- Liuna Laborers Union Local 324
- Low Voltage Security dba Security Lock & Alarm
- M M Electric
- Martin Bros Company
- Matsubu Construction Inc.
- McCollum General Engineering
- McCullough Construction Inc.
- McKeever
- McKenny & Sons Inc.
- McKinleyville Glass Co.
- McMurray & Sons Inc.
- Mendes Supply Company
- Mercer Fraser Company
- Miller Farms Nursery Inc.
- Mobley Construction dba MCI
- Nelson Floor Co.
- New House Construction
- New Life Service Co.
- Nicholls Trucking Inc.
- Nor Cal Mechanical, LLC
- Norcal PTAC
- North Coast Employers Advisory Council
- North Coast Fabricators (Aquatic Design)
- North Coast Floor & Tile
- Northcoast Acoustics
- Northcoast Awning Co.
- Northcoast Environmental Construction
- Northcoast Lighting & Electric Inc.
- NorthPoint Consulting Group, Inc.
- Northridge Electric LLC
- Nylex.Net Inc.
- O & M Industries
- Omsberg & Preston
- On-Site Health & Safety
- Ontiveros & Associates
- Operating Engineers Local #3
- Oscar Larson & Associates
- Owsley Electric
- PACE Supply
- Pacific Builders
- Pacific Earthscape
- Pape` Machinery
- Pauli-Shaw Insurance Agency
- Pierson Building Center
- Pierson Company
- Points West Surveying Co. Inc.
- Poletski’s Appliance Center Inc.
- Porter and Sons Painting
- Powell Concrete Pumping
- PPG Industries
- Primo Drywall Construction Co.
- Property Development & Management Inc.
- R Brown Construction Co. Inc.
- Randall Sand & Gravel
- RAO Construction Co. Inc
- Redwood Capital Bank
- Redwood Coast Energy Authority
- Redwood Coast Plumbing
- Redwood Empire Roofing Inc.
- Renaissance Painting
- Rental Guys
- Revival Home Builders Inc.
- RH Construction
- Rich Well Drilling & Pump Service
- Rick Parker Construction
- Rise Energy
- Robert Blankenship Corp.
- Rogers Machinery Company Inc.
- Roto Rooter
- S&B James Construction Company
- Safetybygeorge, LLC
- Samara Restoration
- Sanborn Design
- Sanders Roofing
- Sargent Excavation
- Schmidbauer Building Supply LLC
- Sequoia Construction Specialties
- Sexton Construction
- Shady Lady Window Coverings & Design
- Shafer’s Ace Hardware
- SHN Consulting
- Sholes Overhead Door Inc.
- Simple Visions LLC
- Six Rivers Mechanical
- Six Rivers Solar
- SJL Construction Inc.
- SJR Masonry and Construction
- Spencer Electric
- Standing Wave Engineering
- Staples Construction
- Statewide Traffic Safety & Signs
- Steve Morris Logging & Contracting
- Steve’s Septic Service LLC
- Stover Engineering
- Straight Edge Painting
- Summit Signal
- Sunbelt Rentals
- Swinerton Builders
- Tensor LLC
- The Mill Yard
- Thomas Home Center
- Thomas R. Bess Inc.
- Thompson Builders Corporation
- Tidewater Contractors
- TnT Drywall
- Travis Carmesin Construction
- Tri Counties Bank
- Trihydro
- Umpqua Bank
- United Plumbing & Mechanical
- United Rentals
- Valley Lumber & Millwork
- Valley Pacific
- VanMeter Logging & Construction
- VS Const-Shinn
- Wahlund Construction Inc.
- Wahlund Construction-Electrical Division
- Wayne Maples Plumbing & Heating
- Wendt Construction
- West Coast Contractors
- Whitchurch Engineering Inc.
- Will Power
- William Gray Construction
- William J. Etter Construction
- Woods Plumbing, Inc.
- Wylatti Resource Management Inc.
- Your Local Mow Man Landscaping and Gardening