| 1 | U.S. Commissioner |
| 2 | U.S. Law Instructor (United States Law Instructor) |
| 3 | U.S. Revenue Officer |
| 4 | Uke Driver |
| 5 | Uke Operator |
| 6 | Ultimate Hoops Referee |
| 7 | Ultra Sound Technician |
| 8 | Ultrasonic Equipment Sales Representative |
| 9 | Ultrasonic Hand Solderer |
| 10 | Ultrasonic Seaming Machine Operator |
| 11 | Ultrasonic Solderer |
| 12 | Ultrasonic Tester |
| 13 | Ultrasonic Welding Machine Operator |
| 14 | Ultrasonographer |
| 15 | Ultrasound Technician (Ultrasound Tech) |
| 16 | Ultrasound Technologist (Ultrasound Tech) |
| 17 | Ultrasound Tester |
| 18 | Umbrella Cutter |
| 19 | Umbrella Supervisor |
| 20 | Umbrella Tipper |
| 21 | Umpire |
| 22 | Umpires, Referees, and Other Sports Officials |
| 23 | Unarmed Security Officer |
| 24 | Unclaimed Property Officer |
| 25 | Under Baster |
| 26 | Under Cutter |
| 27 | Under Cutting Machine Operator |
| 28 | Under Presser |
| 29 | Under Seal Operator |
| 30 | Under Sheriff |
| 31 | Under Trimmer |
| 32 | Under Water Assistant (U/W Assistant) |
| 33 | Undercar Specialist |
| 34 | Undercoater |
| 35 | Undercollar Maker |
| 36 | Undercover Agent |
| 37 | Undercover Cop |
| 38 | Undercover Operator |
| 39 | Underground Bolting Machine Operator |
| 40 | Underground Conduit Installer |
| 41 | Underground Drill Operator |
| 42 | Underground Mine Machinery Mechanic |
| 43 | Underground Miner |
| 44 | Underground Mining Engineer |
| 45 | Underground Pipe Layer |
| 46 | Underground Roof Bolter |
| 47 | Underground Steamline Inspector |
| 48 | Underliner |
| 49 | Undertaker |
| 50 | Undertaker Assistant |
| 51 | Undertaker Helper |
| 52 | Underwater Photographer |
| 53 | Underwater Roboticist |
| 54 | Underwater Welder |
| 55 | Underwear Cutter |
| 56 | Underwear Finisher |
| 57 | Underwear Hemmer |
| 58 | Underwear Trimmer |
| 59 | Underwear Welter |
| 60 | Underwriter |
| 61 | Underwriter Solicitation Director |
| 62 | Underwriting Account Representative |
| 63 | Underwriting Assistant |
| 64 | Underwriting Clerk |
| 65 | Underwriting Clerks Supervisor |
| 66 | Underwriting Consultant |
| 67 | Underwriting Field Inspector |
| 68 | Underwriting Sales Representative |
| 69 | Underwriting Service Representative |
| 70 | Underwriting Support Specialist |
| 71 | Undraped Artist Model |
| 72 | Unemployment Benefits Claims Taker |
| 73 | Unemployment Examiner |
| 74 | Unemployment Inspector |
| 75 | Unemployment Insurance Director |
| 76 | Unexploded Ordnance Quality Control Officer |
| 77 | Unexploded Ordnance Quality Control Worker |
| 78 | Unhairer |
| 79 | Unhairing Machine Operator |
| 80 | Uniform Designer |
| 81 | Uniform Force Captain |
| 82 | Uniform Maker |
| 83 | Uniform Patrol Police Officer |
| 84 | Uniformer |
| 85 | Uniforms Sales Representative |
| 86 | Union Carpenter |
| 87 | Union Contract Representative |
| 88 | Union Organizer |
| 89 | Union Representative |
| 90 | Union Steward |
| 91 | Unionmelt Operator |
| 92 | Unisaw Operator |
| 93 | Unishear Operator |
| 94 | Unit Clerk |
| 95 | Unit Control Clerk |
| 96 | Unit Control Worker |
| 97 | Unit Controller |
| 98 | Unit Forester |
| 99 | Unit Operator |
| 100 | Unit Reactor Operator |
| 101 | Unit Support Representative |
| 102 | Unit Tender |
| 103 | United States Marshal (US Marshal) |
| 104 | Unitizer |
| 105 | Universal Banker |
| 106 | Universal Grinder Operator |
| 107 | Universal Grinder Set-Up Operator |
| 108 | University Administrator |
| 109 | University Archivist |
| 110 | University Counseling Center Psychologist |
| 111 | University Counselor |
| 112 | University Dean |
| 113 | University Department Chair |
| 114 | University Faculty Member |
| 115 | University Housing Director |
| 116 | University President |
| 117 | University Registrar |
| 118 | University Relations Director |
| 119 | Unleavened Dough Mixer |
| 120 | Unload Associate |
| 121 | Unloader |
| 122 | Unloader Operator |
| 123 | Unloading and Loading Line Service Attendant |
| 124 | Unloading Checker |
| 125 | Unmanned Aerial Camera Operator |
| 126 | Unmanned Aerial Systems Operator (UAS Operator) |
| 127 | Unmanned Aerial Systems Pilot (UAS Pilot) |
| 128 | Unmanned Aerial Systems Technician (UAS Technician) |
| 129 | Unmanned Aerial Vehicles Operator (UAV Operator) |
| 130 | Unmanned Aerial Vehicles Pilot (UAV Pilot) |
| 131 | Unmanned Aerial Vehicles Technician (UAV Technician) |
| 132 | Unmanned Air Systems Operator |
| 133 | Unmanned Aircraft Operator (UA Operator) |
| 134 | Unmanned Aircraft Pilot (UA Pilot) |
| 135 | Unmanned Aircraft Systems Operator (UAS Operator) |
| 136 | Unmanned Aircraft Systems Pilot (UAS Pilot) |
| 137 | Unmanned Aircraft Systems Roboticist (UAS Roboticist) |
| 138 | Unmanned Aircraft Systems Technician (UAS Technician) |
| 139 | Unmanned Aircraft Technician (UA Technician) |
| 140 | Unmanned Equipment Operator |
| 141 | Unmanned Systems Operator |
| 142 | Unmanned Systems Pilot |
| 143 | Unmanned Systems Technician |
| 144 | Unracker |
| 145 | Unscrambler |
| 146 | Upholstered Goods Crafter |
| 147 | Upholsterer |
| 148 | Upholsterer Helper |
| 149 | Upholsterers |
| 150 | Upholstery Auto Trimmer |
| 151 | Upholstery Cleaner |
| 152 | Upholstery Covers Inspector |
| 153 | Upholstery Cutter |
| 154 | Upholstery Department Supervisor |
| 155 | Upholstery Estimator |
| 156 | Upholstery Instructor |
| 157 | Upholstery Mechanic |
| 158 | Upholstery Parts Sorter |
| 159 | Upholstery Repairer |
| 160 | Upholstery Sewer |
| 161 | Upholstery Technician |
| 162 | Upholstery Trimmer |
| 163 | Upkeep Worker |
| 164 | Upper Caser |
| 165 | Upper Cutter |
| 166 | Upper Doubler |
| 167 | Upper Extremity Surgeon |
| 168 | Upper Leather Sorter |
| 169 | Upper Stitcher |
| 170 | Upper Tier |
| 171 | UPS Driver (United Parcel Service Driver) |
| 172 | Upset Operator |
| 173 | Upsetter |
| 174 | Upsetting Machine Operator |
| 175 | Upstairs Maid |
| 176 | Upstream Biomanufacturing Technician |
| 177 | Uptwister Tender |
| 178 | Uranium Processing Supervisor |
| 179 | Urban Air Mobility Operator (UAM Operator) |
| 180 | Urban Air Mobility Pilot (UAM Pilot) |
| 181 | Urban Air Mobility Technician (UAM Technician) |
| 182 | Urban and Regional Planners |
| 183 | Urban Environmental Educator |
| 184 | Urban Forester |
| 185 | Urban Gardening Specialist |
| 186 | Urban Planner |
| 187 | Urban Redevelopment Specialist |
| 188 | Urban Sociologist |
| 189 | Urologic Surgeon |
| 190 | Urologist |
| 191 | Urologists |
| 192 | Urology Teacher |
| 193 | US Administrative Law Judge (United States Administrative Law Judge) |
| 194 | US Customs and Border Officer |
| 195 | US Customs and Border Protection Officer (US CBPO) |
| 196 | Usability Engineer |
| 197 | Usability Specialist |
| 198 | Usability Strategist |
| 199 | Used Car Lot Porter |
| 200 | Used Car Make Ready Mechanic |
| 201 | Used Car Make Ready Worker |
| 202 | Used Car Renovator |
| 203 | Used Car Sales Supervisor |
| 204 | Used Car Salesperson |
| 205 | User Experience Designer (UX Designer) |
| 206 | User Interface and User Experience Architect (UI/UX Architect) |
| 207 | User Interface and User Experience Designer (UI/UX Designer) |
| 208 | User Interface Designer |
| 209 | User Interface Designer (UI Designer) |
| 210 | User Support Analyst |
| 211 | User Support Specialist |
| 212 | Usher |
| 213 | Ushers, Lobby Attendants, and Ticket Takers |
| 214 | USPS Letter Carrier (United States Postal Service Letter Carrier) |
| 215 | USPS Mail Carrier (United States Postal Service Mail Carrier) |
| 216 | Utilities and Maintenance Supervisor |
| 217 | Utilities Customer Service Representative (Utilities CSR) |
| 218 | Utilities Equipment Repairer |
| 219 | Utilities Layer |
| 220 | Utilities Operator |
| 221 | Utilities Service Investigator |
| 222 | Utilities Superintendent |
| 223 | Utilities Supervisor |
| 224 | Utilities Technician |
| 225 | Utility Aide |
| 226 | Utility Applicator |
| 227 | Utility Arborist |
| 228 | Utility Attendant |
| 229 | Utility Bagger |
| 230 | Utility Bill Complaints Investigator |
| 231 | Utility Clerk |
| 232 | Utility Distribution Inspector |
| 233 | Utility Division Project Manager |
| 234 | Utility Engineer |
| 235 | Utility Forester |
| 236 | Utility Helicopter Repairer |
| 237 | Utility Layer |
| 238 | Utility Line Locator |
| 239 | Utility Lineman |
| 240 | Utility Locate Technician |
| 241 | Utility Locater |
| 242 | Utility Locator |
| 243 | Utility Mapping Technician |
| 244 | Utility Mechanic Supervisor |
| 245 | Utility Meter Technician |
| 246 | Utility Operator |
| 247 | Utility Person |
| 248 | Utility Pipe Layer |
| 249 | Utility Plant Operative |
| 250 | Utility Plant Operator |
| 251 | Utility Porter |
| 252 | Utility Sales and Service Manager |
| 253 | Utility Sales Representative |
| 254 | Utility Scale Engineer |
| 255 | Utility Service Worker |
| 256 | Utility Spray Operator |
| 257 | Utility System Operator |
| 258 | Utility System Repairer |
| 259 | Utility Systems Repairer Operator |
| 260 | Utility Technician |
| 261 | Utility Teller |
| 262 | Utility Worker |
| 263 | Utilization Engineer |
