Occupational Title | Brief Number | HOC Code |
| Cab Drivers | 242 | RIE |
| Cabinetmakers (carpenters) | 86 | RIS |
| Cabinetmakers (furniture manufacturing) | 373 | RIS |
| Cable Television Systems Technicians and Installers | 244 | RIE |
| CADD Technicians (dafters) | 22 | RCI |
| Cage Workers (gaming) | 577 | CSE |
| Calcine Furnace Tenders (paint & coatings industry) | 56 | REI |
| Calender Operators (industrial chemicals production) | 369 | RSE |
| Calender Operators (rubber goods production) | 328 | RIE |
| Camera Assistants, First (motion picture industry) | 2 | AES |
| Camera Operators (motion picture industry) | 2 | AES |
| Camera Operators (printing industry) | 426 | RIE |
| Camera Operators (radio & television broadcasting) | 428 | AES |
| Camera Operators, Second Assistant (motion picture industry) | 2 | RCS |
| Camera Technicians (motion picture industry) | 2 | AES |
| Camp Counselors (recreation workers) | 92 | SEC |
| Camp Directors (recreation workers) | 92 | ESA |
| Candy Makers (confectionery industry) | 357 | RSE |
| Candy Packers (confectionery industry) | 357 | RES |
| Canine Enforcement Officers | 412 | CEI |
| Canning and Preserving Industry Workers | 389 | no code |
| Capsule Filling Machine Operators (pharmaceutical industry) | 306 | RIE |
| Captains (airplane pilots) | 29 | RIE |
| Captains (commercial fishermen) | 404 | ERS |
| Captains (merchant mariners) | 379 | ERI |
| Carcass Splitters (slaughtering & meat-packing production) | 423 | REC |
| Cardiac Sonographers | 437 | ISR |
| Cardiology Technologists | 437 | ISR |
| Cardiovascular Technicians | 437 | RCI |
| Cardiovascular Technologists | 437 | ISR |
| Career Counselors | 598 | SAE |
| Caretakers (household service) | 232 | RES |
| Cargo and Freight Agents (indutrial traffic managers) | 115 | ERS, ESC, RES |
| Carpenters | 86 | RCE |
| Carpenters, Finish | 86 | RCE |
| Carpenters, Maintenance | 86 | REI |
| Carpenters, Rough | 86 | RIS |
| Car Rental Agents | 380 | ESC |
| Carriers (postal service) | 220 | CRS |
| Cartographers (surveyors) | 221 | RIE |
| Cartoonists | 124 | AES |
| Cartoonists, Editorial | 124 | AES |
| Cartoonists, Motion Picture | 124 | AES |
| Carwash Attendants | 589 | REC |
| Carwash Managers | 589 | RES |
| Case Assemblers (furniture manufacturing) | 373 | CRS |
| Casefitters (furniture manufacturing) | 373 | RCE |
| Case Managers | 278 | SEI |
| Caseworkers (congressional aides) | 525 | SEC |
| Cashiers | 290 | CES |
| Cashiers, Booth (gaming) | 577 | no code |
| Cashiers, Box Office (motion picture theater) | 70 | CES |
| Cash Managers (financial) | 134 | ESC |
| Casing Running Machine Tenders (slaughtering & meat-packing production | 423 | REC |
| Casting Directors (motion picture) | 262 | SEC |
| Casting Inspectors (foundry production) | 374 | CRE |
| Catalogers (health sciences librarians) | 9 | CSE |
| Catalogers (librarians) | 82 | CSE |
| Catalytic Converter Operators (industrial chemicals production) | 369 | RSE |
| Caterers | 473 | ESR |
| Caterers, Private | 473 | ESR |
| Catholic Clergy | 440 | SAE |
| CBP Officers | 412 | CEI |
| Cellular, Tissue, and Genetic Engineers | 519 | IRE |
| Cement Masons | 581 | RES |
| Central Buyers | 95 | ESC |
| Centrifuge Operators (paint & coatings industry) | 56 | RES |
| Ceramic Engineers | 161 | IRS |
| Ceramic Engineers (materials) | 256 | IRS |
| Ceramic Engineers (pottery & porcelain ware industry) | 137 | IRS |
| Certificated Flight Instructors | 554 | ERS |
| Certified Flight Instructors | 554 | ERS |
| Certified Pest Control Applicators | 372 | RES |
| Certified Public Accountants | 63 | CSI |
| Certified Respiratory Therapists | 450 | SIR |
| Chair Assemblers (furniture manufacturing) | 373 | CRS |
| Change Persons (gaming) | 577 | CRE |
| Charging Crane Operators (iron & steel industry) | 305 | RCE |
| Chartered Bus Drivers | 52 | RES |
| Chasers (logging industry) | 416 | RES |
| Chauffeurs (household service) | 232 | RES |
| Chauffeurs (taxi drivers) | 242 | REC |
| Cheesemakers (dairy products manufacturing) | 173 | RES |
| Chefs | 40 | ESR |
| Chefs, Executive | 40 | SER |
| Chefs, Executive (lodging) | 350 | SER |
| Chemical Engineers | 160 | IRE |
| Chemical Engineers (petroleum refining) | 188 | IRE |
| Chemical Laboratory Technicians | 66 | IRS |
| Chemical Oceanographers | 200 | IRE, IRS |
| Chemical Pathologists | 230 | IRE |
| Chemical Technicians (cosmetics industry) | 622 | IRS |
| Chemists | 153 | IRE |
| Chemists, Analytical | 153 | IRE |
| Chemists, Atmospheric | 143 | IRS |
| Chemists, Clinical | 153 | IRE |
| Chemists, Food | 153 | IRS |
| Chemists, Forensic | 153 | IRE |
| Chemists, Industrial Hygiene | 461 | IRE |
| Chemists, Inorganic | 153 | IRE |
| Chemists, Instrumentation | 153 | IRC |
| Chemists, Marine | 200 | IRE, IRS |
| Chemists, Organic | 153 | IRE |
| Chemists, Physical | 153 | IRE |
| Chemists, Polymer | 153 | IRE |
| Chemists, Wastewater Treatment Plant | 153 | IRC |
| Chief Administrative Officers | 445 | SEC |
| Chief Admitting Officers (hospital admitting) | 448 | ESA |
| Chief Compressor Station Engineers (gas & oil distribution) | 196 | RES |
| Chief Dispatchers (gas & oil distribution) | 196 | ESC |
| Chief Engineers (merchant mariners) | 379 | RES |
| Chief Engineers (radio & television broadcasting) | 428 | RIE |
| Chief Executive Officers (association) | 549 | ESR |
| Chief Executives (publishing) | 231 | ESR |
| Chief Librarians (health sciences) | 9 | SER |
| Chief Lighting Technicians (motion picture industry) | 2 | REI |
| Chief Mates (merchant mariners) | 379 | ERS |
| Chiefs of Staff (congressional aides) | 525 | ESC |
| Chief Station Engineers (gas & oil distribution) | 196 | RES |
| Chief Technicians (cable television) | 244 | ERC |
| Child Care Workers | 604 | SAE |
| Child Psychiatrists | 347 | ISA |
| Children's Librarians | 82 | SER |
| Child Social Workers | 84 | SEA |
| Child Welfare Social Workers | 84 | SEA |
| Chipper Operators (logging industry) | 416 | RCS |
| Chipper Operators (paper products manufacturing) | 378 | REC |
| Chiropractic Medical Assistants | 5 | SRE |
| Chiropractors | 146 | ISR |
| Choker Setters (logging industry) | 416 | RES |
| Chopping Machine Operators (slaughtering & meat-packing production) | 423 | RCE |
| Choreographers (dancers) | 394 | AES |
| Choreographers (professional cheerleaders) | 688 | AES |
| Cinematographers (motion picture) | 262 | AES |
| Circulating Technologists | 464 | ISR |
| Circulation Directors (publishing) | 231 | ESA, ESC |
| Circulation Librarians (health sciences) | 9 | SAI |
| Circulation Technologists | 558 | ISR |
| Circus Artists | 251 | no code |
| Circus Performers | 251 | no code |
| CIS Officers | 105 | no code |
| Citizenship and Immigration Service Officers | 105 | ERS |
| City and County Managers | 445 | SEC |
| City/County/Town Administrators | 445 | SEC |
| City Managers | 445 | SEC |
| City Planners | 152 | ESI |
| Civil Drafters | 22 | IRE |
| Civil Engineers | 156 | IRE |
| Claim Adjusters, Independent | 300 | ESR |
| Claim Adjusters, Insurance | 300 | ESR |
| Claim Adjusters, Public | 300 | ESR |
| Claim Representatives | 300 | ESR |
| Clandestine Officers | 626 | AES, ERS |
| Classical Archaeologists | 343 | IRE |
| Classified Advertising Clerks (publishing) | 231 | CES |
| Clay Makers (pottery & porcelain ware industry) | 137 | REI |
| Cleaners | 245 | RES |
| Cleaners (shoe industry) | 142 | RCS |
| Clergy, Catholic | 440 | SAE |
| Clergy, Protestant | 264 | SAE |
| Climatologists | 143 | IRS |
| Clinical Chemists | 153 | IRE |
| Clinical Dietitians | 76 | SIE |
| Clinical Engineers | 519 | IRE |
| Clinical Laboratory Technicians (medical technologists) | 16 | ISA |
| Clinical Laboratory Technologists | 16 | ISA |
| Clinical Pathologists | 230 | IRE |
| Clinical Psychologists | 144 | SIA |
| Clinical Sociologists | 316 | SEC |
| Closed-Caption Writers (court reporters) | 265 | IRC |
| Clowns (circus performers) | 251 | EAC |
| Clowns (variety performers) | 607 | EAC |
| CNC Machine Operators | 556 | REI |
| Coaches, Professional Athletes | 438 | SRE |
| Coal Petrologists | 560 | ISR |
| Coast Guard Personnel | 439 | no code |
| Coaters (pharmaceutical industry) | 306 | REI |
| Coating and Baking Operators (industrial chemicals production) | 369 | RCE |
| Code Enforcement Officers (fire fighters) | 69 | ESA |
| Coders (marketing researchers) | 254 | CES |
| Coding Specialists, Health Information | 681 | CIR |
| Collateral Loan Brokers | 619 | ECS |
| Collection Clerks (credit) | 362 | ESA |
| College and University Admissions Directors | 65 | ESA |
| College and University Faculty Members | 184 | no code |
| College and University Registrars | 371 | ESC |
| Collision Repair Technicians | 96 | RIE |
| Colorists (cartoonists) | 124 | AES |
| Color Printer Operators (photofinishing laboratory technicians) | 310 | RIE |
| Comedians (variety performers) | 607 | AES |
| Commercial Airplane Pilots | 29 | RIE |
| Commercial Arborists | 291 | REI |
| Commercial Designers | 126 | AES |
| Commercial Divers | 361 | RES |
| Commercial Fishermen | 404 | RES |
| Commercial Loan Officers | 443 | SEI |
| Commercial Models | 61 | EAS |
| Commercial Photographers | 12 | ARS |
| Commodity Graders, Agricultural (consumer safety officers) | 620 | REI |
| Community Dietitians | 76 | SRE |
| Community Health Consultants | 518 | SEA |
| Community Health Education Coordinators | 518 | SEA |
| Community Health Nurses (registered professional) | 75 | SIE |
| Community Managers | 122 | ESR |
| Community Organizers | 628 | ESA |
| Community Planners | 152 | ESI |
| Companion Animal Trainers | 508 | RES, SEC |
| Company Managers (theatrical production) | 612 | SEC |
| Comparative Psychologists (animal behaviorists) | 547 | IAE |
| Compensation Managers (human resources) | 258 | ESR |
| Compilers (marketing researchers) | 254 | CSE |
| Complete and Partial Dental Technicians | 31 | REI |
| Compliance Officers | 323 | ESR |
| Composers (video game developers) | 678 | ASE |
| Composites Engineers | 256 | REI |
| Compounders (cosmetics industry) | 622 | REI |
| Compounders (petroleum refining) | 188 | RES |
| Compressors (pharmaceutical industry) | 306 | RCS |
| Computer Applications Software Engineers | 672 | IRE |
| Computer Hardware Engineers (electronics) | 166 | RIE |
| Computer Numerical-Control Machine Operators | 556 | REI |
| Computer Operators (support specialists) | 482 | CSR |
| Computer Programmers | 177 | IRC |
| Computer Programmers (temporary workers) | 674 | IRC |
| Computer Security Specialists | 682 | CIS |
| Computer Service Technicians | 363 | RIE |
| Computer Software Engineers | 672 | IRE |
| Computer Specialists (publishing) | 231 | IRS |
| Computer Support Specialists | 482 | SER |
| Computer Support Specialists (temporary workers) | 674 | CIS, CSI, SER |
| Computer Systems Analysts | 337 | IER |
| Computer Systems Software Engineers | 672 | IRE |
| Concession Attendants (motion picture theater) | 70 | ERS |
| Concierges (resort industry) | 50 | ESC |
| Conductors, Freight (railroad) | 14 | ECS |
| Conductors, Passenger (railroad) | 14 | ESA |
| Confectionery Cookers | 357 | RIE |
| Confectionery Industry Workers | 357 | no code |
| Congressional Aides | 525 | CES |
| Conservationists, Soil | 201 | IRE |
| Conservation Officers | 213 | RES |
| Conservators (curators) | 393 | RIS |
| Construction Electricians | 395 | RIE |
| Construction Engineers (civil) | 156 | ERS, IRE |
| Construction Equipment Operators | 171 | RIS |
| Construction Ironworkers | 359 | REI |
| Construction Laborers | 392 | RIE |
| Construction Managers | 324 | ERS |
| Construction Plumbers | 43 | REI |
| Construction Superintendents | 324 | ERS |
| Constructors | 324 | ERS |
| Consular Officers | 189 | ESA |
| Consultants | 238 | IRS |
| Consultation-Liaison Psychiatrists | 347 | ISA |
| Consulting Dietitians | 76 | SEI |
| Consumer Electronics Technicians | 645 | REI |
| Consumer Loan Officers | 443 | SEI |
| Consumer Safety Inspectors | 620 | SAE |
| Consumer Safety Officers | 620 | SAE |
| Continuity Writers (radio & television broadcasting) | 428 | AES |
| Continuous Mining Machine Operators (industry workers) | 187 | RSE |
| Contract Managers | 215 | ESA |
| Contractors, Field (canning & preserving) | 389 | SEA |
| Contractors, Ground Water | 499 | RIE |
| Contractors, Landscape (architects) | 164 | RIS |
| Contractors, Landscape (horticulturists) | 203 | ESR |
| Contractors, Landscape (landscapers) | 451 | ESR |
| Controllers (lodging) | 350 | EIS |
| Control Shooters (firearms industry) | 399 | RCS |
| Convention Managers | 130 | ESA, ESI |
| Convention Services Managers (lodging) | 350 | ESA |
| Conveyor Operators (pasta products) | 555 | REC |
| Cookers, Confectionery | 357 | RIE |
| Cooks (chefs) | 40 | RSE |
| Cooks (household service) | 232 | RSE |
| Cooks, Short-order (chefs) | 40 | RSE |
| Cooling Tank Crew (canning & preserving) | 389 | RES |
| Coordinators (canning & preserving) | 389 | CRE |
| Copilots (airplane) | 29 | RIE |
| Co-producers (motion picture) | 262 | ESA |
| Copy Editors | 131 | AES |
| Copy Editors (publishing) | 231 | AES, CIA |
| Copywriters (advertising agency) | 113 | ASI |
| Coremakers (foundry production) | 374 | RCI |
| Coroners | 332 | ISE |
| Corporate Lawyers | 94 | ESA |
| Corporate Trainers | 572 | ESR, SEC |
| Correctional Officers | 467 | SER |
| Correctional Treatment Specialists (probation & parole officers) | 277 | SEI |
| Correction Officers | 467 | SER |
| Corrective Therapists | 36 | SIR |
| Correspondents, Legislative (congressional aides) | 525 | CSE |
| Corrugator Operators (paper products manufacturing) | 378 | RSE |
| Cosmetics Industry Workers | 622 | no code |
| Cosmetologists | 7 | SEA |
| Cosmologists | 210 | IRE |
| Costume Designers (motion picture) | 262 | ASR |
| Counseling Psychologists | 144 | SIA |
| Counselors, Addiction | 217 | SEA |
| Counselors, Animal Behavior | 508 | RES, SEC |
| Counselors, Behavioral Disorder | 217 | SEA |
| Counselors, Camp (recreation workers) | 92 | SEC |
| Counselors, Career | 598 | SAE |
| Counselors, Credit (loan officers) | 443 | ESI |
| Counselors, Employment | 598 | SAE |
| Counselors, Genetic | 492 | IRS |
| Counselors, Genetic | 533 | IRS |
| Counselors, HIV/AIDS | 503 | ESA |
| Counselors, Loan (officers) | 443 | ESI |
| Counselors, Mental Health | 655 | SEC |
| Counselors, Rehabilitation | 279 | SEC |
| Counselors, Residential | 649 | SAE |
| Counselors, School | 145 | SAE |
| Counselors, Substance Abuse | 217 | SEA |
| Counselors, Vocational | 598 | SAE |
| Counter Attendants (dry cleaning) | 34 | ECS |
| Counter Workers | 340 | SCR |
| Couples Therapists | 630 | SAE |
| Couriers | 647 | CES |
| Court Administrators | 329 | ESR |
| Court Assistants | 304 | CSE |
| Court Clerks | 304 | CSE |
| Court Clerks, Federal | 304 | CSE |
| Court Officers | 331 | ESR |
| Court Reporters | 265 | CSE |
| Court Reporters (secretaries) | 19 | CSE |
| Court Security Officers (deputy U.S. marshals) | 676 | ERS |
| Cowpunchers (livestock industry) | 479 | RES |
| Crab Fishermen (commercial) | 404 | REI |
| Crane Operators (construction equipment) | 171 | RES |
| Crane Operators (iron & steel industry) | 305 | RCS |
| Crane Operators (longshore) | 484 | RES |
| Crane Operators (shipbuilding) | 435 | RCS |
| Creative Arts Therapists | 386 | ASI |
| Creative Directors (advertising agency) | 113 | AES |
| Creative Writers | 606 | no code |
| Credit Analysts | 362 | ESR |
| Credit Analysts (loan officers) | 443 | CRS |
| Credit Authorizers | 362 | CES |
| Credit Clerks | 362 | CSE |
| Credit Clerks (office) | 3 | CSE |
| Credit Collection Officers (loan) | 443 | ESA |
| Credit Counselors (loan officers) | 443 | ESI |
| Credit Managers | 362 | ESC |
| Credit Managers (financial) | 134 | ESC |
| Credit Reporters | 362 | CSE |
| Credit Workers | 362 | no code |
| Cremators (funeral directors) | 38 | RES |
| Crime Lab Analysts (forensic scientists) | 275 | IRC |
| Crime Scene Investigators (forensic scientists) | 275 | IRC |
| Crime Scene Technicians (forensic scientists) | 275 | IRC |
| Criminal Investigators (immigration enforcement) | 139 | ERI, SRI |
| Criminalists (forensic scientists) | 275 | IRC |
| Criminal Lawyers | 94 | ESA |
| Criminologists | 316 | IES |
| Criminologists | 456 | IES |
| Critical Care Nurses | 75 | SIA |
| Critics (creative writers) | 606 | AES |
| Crop Farmers | 483 | REI |
| Crossing Guards | 587 | ESC |
| Crown and Bridge Technicians | 31 | REI |
| Cruise Directors | 302 | ESC |
| Cruisers (forest technicians) | 283 | RIE |
| Crushed Stone Workers (mining industry) | 187 | RIS |
| Cryobiologists | 573 | IAR |
| Cultural Anthropologists | 382 | IRE |
| Cultural Development Officers | 535 | ESC, ESR |
| Cultural Geographers | 155 | IRE |
| Cultural Resource Managers | 343 | IRE |
| Curators | 393 | IRS |
| Curers (industrial chemicals production) | 369 | REI |
| Cushion Makers (furniture manufacturing) | 373 | RCE |
| Cushion Padders (upholsterers) | 219 | CRE |
| Custodians | 245 | RES |
| Custom Builders | 183 | EIR |
| Customer Service Representatives | 421 | CES |
| Customer Service Representatives (dry cleaning) | 34 | ECS |
| Customer Service Representatives (laundry) | 79 | ECS |
| Customer Service Representatives (publishing) | 231 | ECR |
| Customs Agriculture Specialists | 412 | ISE |
| Customs and Border Protection Officers | 412 | CEI |
| Customs Brokers (export-import) | 403 | ESR |
| Custom Sewers | 6 | RES |
| Customs Import Specialists | 412 | ISE |
| Customs Inspectors | 412 | CEI |
| Cutoff Sawyers (sawmill) | 441 | RSC |
| Cutter Operators (mining industry) | 187 | RCS |
| Cutters (apparel industry) | 35 | RES |
| Cutters (furniture manufacturing) | 373 | RES |
| Cutters (knit goods industry) | 413 | RCE |
| Cutters (shoe industry) | 142 | RES |
| Cytogeneticists | 533 | IRS |
| Cytogenetic Technologists | 533 | IRS |
| Cytologists (botanists) | 635 | IRE |
| Cytopathologists | 230 | IRE |
| Cytotechnologists | 314 | ICR |