| AAA ABSOLUTE AIR AUTHORITY LLC | CRE149 | Electrical | — |
| AAA ABSOLUTE AIR AUTHORITY LLC | LHR604 | Electrical | — |
| ACCURATE ELECTRIC TECHNOLOGIES LLC | C662 | Electrical | — |
ACCURATE ELECTRICAL SOLUTIONS
CARLSON CORP | C1577 | Electrical | — |
ACCURATE PLUMBING SOLUTIONS
CARLSON CORP | PB1984 | Plumbing | — |
| ACTION ELECTRIC LLC | C314 | Electrical | — |
| ADEPT COMMUNICATIONS INC | CLE58 | Electrical | — |
| ADVANTAGE PLUMBING & MECHANICAL LLC | PB1095 | Plumbing | — |
| AIR EXPRESS HEATING AND AIR CONDITIONING INC | LHR620 | Electrical | — |
ALL NATURAL PEST ELIMINATION
NORTHWEST GREEN SOLUTIONS INC | PB1854 | Plumbing | — |
| ALLIED COMFORT PRO LLC | LHR515 | Electrical | — |
| APPLIED REFRIGERATION TECHNOLOGY INC | BB311 | Boiler | — |
| ART OF PLUMBING LLC | PB576 | Plumbing | — |
| AZTEC ELECTRICAL LLC | C917 | Electrical | — |
| AZTEC ELECTRICAL LLC | LMS266 | Electrical | — |
| BASE ONE PLUMBING LLC | PM24 | Combo License | — |
| BEAN ELECTRICAL CONTRACTORS LLC | C1497 | Electrical | — |
| BROOKS CLASSIC CONSTRUCTION LLC | PB2490 | Plumbing | — |
| CENTRAL ELECTRIC LIGHTING INC | 15-312LMS | Electrical | — |
| CR COMBUSTION INC | BB102 | Boiler | — |
| CR COMBUSTION INC | LHR161 | Electrical | — |
| CURRENT ELECTRIC LLC | C939 | Electrical | — |
| CURTIUS PLUMBING AND MECHANICAL INC | BB13 | Boiler | — |
| CURTIUS PLUMBING AND MECHANICAL INC | 15-200PB | Plumbing | — |
| D & D PLUMBING & REPAIR CO | 15-47PB | Plumbing | — |
| DAVE HERYFORD ELECTRIC LLC | C1414 | Electrical | — |
| DELTA ELECTRIC LLC | C1808 | Electrical | — |
DOUBLE D ELECTRIC
RF ENTERPRISES INC | 15-109C | Electrical | — |
| EAGAR PLUMBING LLC | PB2443 | Plumbing | — |
| ECONOMY PLUMBING INC | 15-110PB | Plumbing | — |
| ELEVATE PLUMBING LLC | PB3387 | Plumbing | — |
| HUKILLS INC | CPI30 | Electrical | — |
| HUKILLS INC | LMS226 | Electrical | — |
| HUKILLS INC | 18-38PB | Plumbing | — |
| INNOVATIVE ELECTRICAL SOLUTIONS LLC | C981 | Electrical | — |
| INTEGRITY PLUMBING SOLUTIONS LLC | PB3612 | Plumbing | — |
| IPIPE PLUMBING LLC | PB1357 | Plumbing | — |
| JENNINGS PLUMBING & MECHANICAL, LLC | PB1097 | Plumbing | — |
| JOHNSON CONTROLS BUILDING SOLUTIONS LLC | CLE808 | Electrical | — |
| KAUFMANN PLUMBING & MECHANICAL LLC | BP87 | Combo License | — |
| KLEINBERG TECH DEVELOPMENT AND TECHNICAL SOLUTIONS LLC | SRB41 | Certification | — |
KNIFE RIVER MATERIALS AN MDU RESOURCES COMPANY
LTM INCORPORATED | PB2402 | Plumbing | — |
| LALLO PIPELINE INC | PB2741 | Plumbing | — |
| LEDFORD CONSTRUCTION COMPANY | PB2828 | Plumbing | — |
| LMC DEVELOPMENT LLC | PB3725 | Plumbing | — |
| LONGS CONSTRUCTION INC | CRE181 | Electrical | — |
| M JACKSON ELECTRIC LLC | C1854 | Electrical | — |
| MANKINS ELECTRIC LLC | C2211 | Electrical | — |
| MODERN ELECTRIC INC | C1385 | Electrical | — |
| NATHAN PERRY HEATING & AIR CONDITIONING LLC | LHR317 | Electrical | — |
| NORTHERN LIGHTS ELECTRICAL CONTRACTOR INCORPORATED | C44 | Electrical | — |
| PACIFIC ELECTRICAL CONTRACTORS INC | 15-10C | Electrical | — |
| PATTERSON PLBG CO INC | B99-2082 | Boiler | — |
| PATTERSON PLBG CO INC | 15-26PB | Plumbing | — |
| PRECISION ELECTRIC CONTRACTORS LLC | 15-136C | Electrical | — |
| PREFERRED PLUMBING INC | PB2087 | Plumbing | — |
READ ELECTRIC INC
MARK READ ELECTRIC INC | 15-48C | Electrical | — |
| REVIVAL SOLAR LLC | CLR65 | Electrical | — |
| RIVER VALLEY ELECTRIC LLC | C2182 | Electrical | — |
ROTO ROOTER SEWER AND DRAIN SERVICE
WECONDUIT LLC | PB837 | Plumbing | — |
| SISKIYOU ELECTRIC LLC | C1515 | Electrical | — |
| SISKIYOU PUMP SERVICE INCORPORATED | 98CPI | Electrical | — |
SOS ALARM CO
MEDFORD ALARM & SIGNAL COMPANY | 15-77CLE | Electrical | — |
| SOUTHERN OREGON HEATING AND AC INC | CRE54 | Electrical | — |
| SOUTHERN OREGON HEATING AND AC INC | LHR134 | Electrical | — |
| SOUTHERN OREGON HEATING AND AC INC | 15-163PB | Plumbing | — |
| SOUTHERN OREGON PLUMBING LLC | PB3394 | Plumbing | — |
STEVE ROBERTS ELECTRIC
EMR UNIVERSAL LLC | C1918 | Electrical | — |
| STEWARDSHIP PLUMBING LLC | PB3209 | Plumbing | — |
| TRADEMARK TEK HEATING AND AIR CONDITIONING INC | LHR490 | Electrical | — |
| TRU FLOW UNDERGROUND LLC | PB3680 | Plumbing | — |
| WILCON ELECTRIC LLC | C1738 | Electrical | — |
| WINTERS ELECTRIC LLC | 37-1036C | Electrical | — |
| ZZ ELECTRIC LLC | C726 | Electrical | — |