| NFNash Fabricators INC | Vista | — | ◇ UNVERIFIED |
| NSNational Spring CO INC | San Diego | — | ◇ UNVERIFIED |
| NANordson Asymtek | Vista | — | ◇ UNVERIFIED |
| NCNorth County Plating & Polishing | Escondido | — | ◇ UNVERIFIED |
| NSNorth Star Propellers INC | San Diego | — | ◇ UNVERIFIED |
| NRNucor Rebar Fabrication Southwest INC | Lakeside | — | ◇ UNVERIFIED |
| OEOceanside Engineering Mfg | Oceanside | — | ◇ UNVERIFIED |
| OFOmega Firm INC Dba Half Face Blades | San Diego | — | ◇ UNVERIFIED |
| OTOrtho Tech INC | Ramona | — | ◇ UNVERIFIED |
| PEPacific Engineering Services | San Diego | — | ◇ UNVERIFIED |
| PPPalomar Plating | Escondido | — | ◇ UNVERIFIED |
| PIPC Iron INC Dba Pacific Coast Iron | Spring Valley | — | ◇ UNVERIFIED |
| PSPCIW Steel Corp. | Spring Valley | — | ◇ UNVERIFIED |
| PIPeters Interest LLC | Escondido | — | ◇ UNVERIFIED |
| PPPlenums Plus | Chula Vista | — | ◇ UNVERIFIED |
| P2Plus 2 International INC | Carlsbad | — | ◇ UNVERIFIED |
| PPPolishing Proz | El Cajon | — | ◇ UNVERIFIED |
| PEPrecision Engine Control Corporation | San Diego | — | ◇ UNVERIFIED |
| PPPronto Products Co. | San Diego | — | ◇ UNVERIFIED |
| PPPronto Products Co. | San Diego | — | ◇ UNVERIFIED |
| PCPrysmian Cables and Systems | Chula Vista | — | ◇ UNVERIFIED |
| PPPyramid Precision Machine INC | San Diego | — | ◇ UNVERIFIED |
| QSQed Systems INC Nassco | San Diego | — | ◇ UNVERIFIED |
| RSRainbow Steel | La Mesa | — | ◇ UNVERIFIED |
| RSRaytheon Systems CO Training & Services | Chula Vista | — | ◇ UNVERIFIED |
| RMRight Manufacturing, LLC | San Diego, | — | ◇ UNVERIFIED |
| RERincon Engineering Technologies | San Diego | — | ◇ UNVERIFIED |
| RMRj Machine INC | San Diego | — | ◇ UNVERIFIED |
| RIRodrigco Industries Inc. | Oceanside | — | ◇ UNVERIFIED |
| RTRogue Tactical | San Diego | — | ◇ UNVERIFIED |
| RTRogue Tactical ; Rogue Tac; Limited 10 ; L10 Machine | San Diego | — | ◇ UNVERIFIED |
| RHRupes Hydraulics Rupe CORP | San Marcos | — | ◇ UNVERIFIED |
| RZR. Zamora INC | Vista | — | ◇ UNVERIFIED |
| RZR Zamora INC Dba Tecxel | Oceanside | — | ◇ UNVERIFIED |
| SISabre Industries | Lakeside | — | ◇ UNVERIFIED |
| SDSan Diego Fluid System Technologies | San Diego | — | ◇ UNVERIFIED |
| SDSan Diego Powder Coating | El Cajon | — | ◇ UNVERIFIED |
| SDSan Diego Vista Steel Services CORP | San Diego | — | ◇ UNVERIFIED |
| SMSantourian Manufacturingna INC | Oceanside | — | ◇ UNVERIFIED |
| SESchindler Elevator CORP | San Diego | — | ◇ UNVERIFIED |
| SMScreed Master Products INC | El Cajon | — | ◇ UNVERIFIED |
| SSScw Scrape Certify Welding | Fallbrook | — | ◇ UNVERIFIED |
| STSeashell Technology | San Diego | — | ◇ UNVERIFIED |
| SBSelect Build INC | Escondido | — | ◇ UNVERIFIED |
| SSerco | San Diego | — | ◇ UNVERIFIED |
| SPSierra Peaks | Lemon Grove | — | ◇ UNVERIFIED |
| SISigntech INC | San Diego | — | ◇ UNVERIFIED |
| SHSocal Hydraulics | El Cajon | — | ◇ UNVERIFIED |
| SPSolmar Precision Machining LLC | Ramona | — | ◇ UNVERIFIED |
| SCSouth Coast Commercial | San Diego | — | ◇ UNVERIFIED |
