I: 113 occupations with an interest code starting with I
A Holland code is one to three letters in order of strength. Investigative — that is what I stands for here. Below are the O*NET occupations whose Interest High-Point (IH) code begins with these letters.
Quick answer
- Directions in this code
- IInvestigative
- Occupations with this code
- 113
- Occupations shown
- Showing the 50 largest of 113 occupations with this code.
- Median wage on this page (lowest – highest)
- 50 of 50 occupations with a published median ($50,290 – $265,930)
The range covers only the occupations shown on this page.
O*NET Database 31.0 (retrieved 2026-09-15); BLS OES May 2025 release (retrieved 2026-09-15).
Occupations with this code
Ordered by U.S. employment, largest first. The order means nothing else: it is not a recommendation, and this page does not know your interests.
Software Developers
- O*NET-SOC code
- 15-1252.00
- Its Holland code
- IC
- U.S. median wage
- $135,980
- U.S. employment
- 1,687,890
- Typical education
- Bachelor's
Sustainability Specialists
- O*NET-SOC code
- 13-1199.05
- Its Holland code
- IEC
- U.S. median wage
- $83,050
- U.S. employment
- 1,087,090
- Typical education
- Bachelor's
Computer Systems Analysts
- O*NET-SOC code
- 15-1211.00
- Its Holland code
- IC
- U.S. median wage
- $105,850
- U.S. employment
- 519,530
- Typical education
- Associate's (2-year)
Health Informatics Specialists
- O*NET-SOC code
- 15-1211.01
- Its Holland code
- ICS
- U.S. median wage
- $105,850
- U.S. employment
- 519,530
- Typical education
- Master's
Penetration Testers
- O*NET-SOC code
- 15-1299.04
- Its Holland code
- ICR
- U.S. median wage
- $116,580
- U.S. employment
- 435,370
- Typical education
- Bachelor's
Digital Forensics Analysts
- O*NET-SOC code
- 15-1299.06
- Its Holland code
- IC
- U.S. median wage
- $116,580
- U.S. employment
- 435,370
- Typical education
- Bachelor's
Coroners
- O*NET-SOC code
- 13-1041.06
- Its Holland code
- ICE
- U.S. median wage
- $80,730
- U.S. employment
- 417,070
- Typical education
- Bachelor's
Human Factors Engineers and Ergonomists
- O*NET-SOC code
- 17-2112.01
- Its Holland code
- IRC
- U.S. median wage
- $102,440
- U.S. employment
- 365,740
- Typical education
- Master's
Validation Engineers
- O*NET-SOC code
- 17-2112.02
- Its Holland code
- ICR
- U.S. median wage
- $102,440
- U.S. employment
- 365,740
- Typical education
- Bachelor's
Allergists and Immunologists
- O*NET-SOC code
- 29-1229.01
- Its Holland code
- IS
- U.S. median wage
- $265,930
- U.S. employment
- 342,720
- Typical education
- Post-doctoral
Urologists
- O*NET-SOC code
- 29-1229.03
- Its Holland code
- ISR
- U.S. median wage
- $265,930
- U.S. employment
- 342,720
- Typical education
- Post-doctoral
Physical Medicine and Rehabilitation Physicians
- O*NET-SOC code
- 29-1229.04
- Its Holland code
- ISR
- U.S. median wage
- $265,930
- U.S. employment
- 342,720
- Typical education
- Doctorate
Preventive Medicine Physicians
- O*NET-SOC code
- 29-1229.05
- Its Holland code
- IS
- U.S. median wage
- $265,930
- U.S. employment
- 342,720
- Typical education
- Post-doctoral
Sports Medicine Physicians
- O*NET-SOC code
- 29-1229.06
- Its Holland code
- ISR
- U.S. median wage
- $265,930
- U.S. employment
- 342,720
- Typical education
- Doctorate
Medical and Clinical Laboratory Technologists
- O*NET-SOC code
- 29-2011.00
- Its Holland code
- IRC
- U.S. median wage
- $62,930
- U.S. employment
- 332,940
- Typical education
- Bachelor's
Cytogenetic Technologists
- O*NET-SOC code
- 29-2011.01
- Its Holland code
- IRC
- U.S. median wage
- $62,930
- U.S. employment
- 332,940
- Typical education
- Bachelor's
Cytotechnologists
- O*NET-SOC code
- 29-2011.02
- Its Holland code
- IRC
- U.S. median wage
- $62,930
- U.S. employment
- 332,940
- Typical education
- Bachelor's
Histotechnologists
- O*NET-SOC code
- 29-2011.04
- Its Holland code
- IRC
- U.S. median wage
- $62,930
- U.S. employment
- 332,940
- Typical education
- Bachelor's
Nurse Practitioners
- O*NET-SOC code
- 29-1171.00
- Its Holland code
- ISC
- U.S. median wage
- $132,300
- U.S. employment
- 323,040
- Typical education
- Master's
Pharmacists
- O*NET-SOC code
- 29-1051.00
- Its Holland code
- ISC
- U.S. median wage
- $140,910
- U.S. employment
- 321,970
- Typical education
- Doctorate
Data Scientists
- O*NET-SOC code
- 15-2051.00
- Its Holland code
- IC
- U.S. median wage
- $120,230
- U.S. employment
- 262,440
- Typical education
- Bachelor's
Biofuels/Biodiesel Technology and Product Development Managers
- O*NET-SOC code
- 11-9041.01
- Its Holland code
- IER
- U.S. median wage
- $171,270
- U.S. employment
- 220,260
- Typical education
- Bachelor's
Software Quality Assurance Analysts and Testers
- O*NET-SOC code
- 15-1253.00
- Its Holland code
- ICR
- U.S. median wage
- $104,300
- U.S. employment
- 186,740
- Typical education
- Bachelor's
Neurodiagnostic Technologists
- O*NET-SOC code
- 29-2099.01
- Its Holland code
- IRC
- U.S. median wage
- $50,290
- U.S. employment
- 182,610
- Typical education
- Associate's (2-year)
Computer Network Architects
- O*NET-SOC code
- 15-1241.00
- Its Holland code
- ICR
- U.S. median wage
- $134,050
- U.S. employment
- 179,740
- Typical education
- Bachelor's
Medical Scientists, Except Epidemiologists
- O*NET-SOC code
- 19-1042.00
- Its Holland code
- IR
- U.S. median wage
- $103,410
- U.S. employment
- 172,340
- Typical education
- Doctorate
Microsystems Engineers
- O*NET-SOC code
- 17-2199.06
- Its Holland code
- IRC
- U.S. median wage
- $122,930
- U.S. employment
- 154,070
- Typical education
- Master's
Nanosystems Engineers
- O*NET-SOC code
- 17-2199.09
- Its Holland code
- IRC
- U.S. median wage
- $122,930
- U.S. employment
- 154,070
- Typical education
- Doctorate
Occupational Health and Safety Specialists
- O*NET-SOC code
- 19-5011.00
- Its Holland code
- ICR
- U.S. median wage
- $90,150
- U.S. employment
- 140,610
- Typical education
- Bachelor's
Financial Quantitative Analysts
- O*NET-SOC code
- 13-2099.01
- Its Holland code
- IC
- U.S. median wage
- $81,100
- U.S. employment
- 132,130
- Typical education
- Master's
Dentists, General
- O*NET-SOC code
- 29-1021.00
- Its Holland code
- IRS
- U.S. median wage
- $170,950
- U.S. employment
- 124,390
- Typical education
- Doctorate
Detectives and Criminal Investigators
- O*NET-SOC code
- 33-3021.00
- Its Holland code
- ICR
- U.S. median wage
- $93,790
- U.S. employment
- 114,430
- Typical education
- Vocational certificate
Intelligence Analysts
- O*NET-SOC code
- 33-3021.06
- Its Holland code
- ICE
- U.S. median wage
- $93,790
- U.S. employment
- 114,430
- Typical education
- Bachelor's
Web and Digital Interface Designers
- O*NET-SOC code
- 15-1255.00
- Its Holland code
- IAC
- U.S. median wage
- $104,000
- U.S. employment
- 113,330
- Typical education
- Bachelor's
Natural Sciences Managers
- O*NET-SOC code
- 11-9121.00
- Its Holland code
- IEC
- U.S. median wage
- $167,220
- U.S. employment
- 108,690
- Typical education
- Bachelor's
Clinical Research Coordinators
- O*NET-SOC code
- 11-9121.01
- Its Holland code
- ICE
- U.S. median wage
- $167,220
- U.S. employment
- 108,690
- Typical education
- Bachelor's
Water Resource Specialists
- O*NET-SOC code
- 11-9121.02
- Its Holland code
- IRC
- U.S. median wage
- $167,220
- U.S. employment
- 108,690
- Typical education
- Bachelor's
Operations Research Analysts
- O*NET-SOC code
- 15-2031.00
- Its Holland code
- IC
- U.S. median wage
- $88,940
- U.S. employment
- 108,510
- Typical education
- Master's
Environmental Scientists and Specialists, Including Health
- O*NET-SOC code
- 19-2041.00
- Its Holland code
- IRC
- U.S. median wage
- $82,220
- U.S. employment
- 89,250
- Typical education
- Bachelor's
Climate Change Policy Analysts
- O*NET-SOC code
- 19-2041.01
- Its Holland code
- IEC
- U.S. median wage
- $82,220
- U.S. employment
- 89,250
- Typical education
- Master's
Environmental Restoration Planners
- O*NET-SOC code
- 19-2041.02
- Its Holland code
- IRC
- U.S. median wage
- $82,220
- U.S. employment
- 89,250
- Typical education
- Bachelor's
Industrial Ecologists
- O*NET-SOC code
- 19-2041.03
- Its Holland code
- IRC
- U.S. median wage
- $82,220
- U.S. employment
- 89,250
- Typical education
- Master's
Veterinarians
- O*NET-SOC code
- 29-1131.00
- Its Holland code
- IR
- U.S. median wage
- $130,100
- U.S. employment
- 83,900
- Typical education
- Doctorate
Chemists
- O*NET-SOC code
- 19-2031.00
- Its Holland code
- IRC
- U.S. median wage
- $91,240
- U.S. employment
- 82,770
- Typical education
- Bachelor's
Aerospace Engineers
- O*NET-SOC code
- 17-2011.00
- Its Holland code
- IRC
- U.S. median wage
- $134,960
- U.S. employment
- 67,710
- Typical education
- Bachelor's
General Internal Medicine Physicians
- O*NET-SOC code
- 29-1216.00
- Its Holland code
- ISR
- U.S. median wage
- $256,560
- U.S. employment
- 67,150
- Typical education
- Post-doctoral
Chemical Technicians
- O*NET-SOC code
- 19-4031.00
- Its Holland code
- IRC
- U.S. median wage
- $60,390
- U.S. employment
- 57,540
- Typical education
- Bachelor's
Bioinformatics Scientists
- O*NET-SOC code
- 19-1029.01
- Its Holland code
- ICR
- U.S. median wage
- $98,920
- U.S. employment
- 55,850
- Typical education
- Master's
Molecular and Cellular Biologists
- O*NET-SOC code
- 19-1029.02
- Its Holland code
- ICR
- U.S. median wage
- $98,920
- U.S. employment
- 55,850
- Typical education
- Bachelor's
Geneticists
- O*NET-SOC code
- 19-1029.03
- Its Holland code
- ICR
- U.S. median wage
- $98,920
- U.S. employment
- 55,850
- Typical education
- Post-doctoral
| Occupation | O*NET-SOC code | Its Holland code | U.S. median wage | U.S. employment | Typical education |
|---|---|---|---|---|---|
| Software Developers | 15-1252.00 | IC | $135,980 | 1,687,890 | Bachelor's |
| Sustainability Specialists | 13-1199.05 | IEC | $83,050 | 1,087,090 | Bachelor's |
| Computer Systems Analysts | 15-1211.00 | IC | $105,850 | 519,530 | Associate's (2-year) |
| Health Informatics Specialists | 15-1211.01 | ICS | $105,850 | 519,530 | Master's |
| Penetration Testers | 15-1299.04 | ICR | $116,580 | 435,370 | Bachelor's |
| Digital Forensics Analysts | 15-1299.06 | IC | $116,580 | 435,370 | Bachelor's |
| Coroners | 13-1041.06 | ICE | $80,730 | 417,070 | Bachelor's |
| Human Factors Engineers and Ergonomists | 17-2112.01 | IRC | $102,440 | 365,740 | Master's |
| Validation Engineers | 17-2112.02 | ICR | $102,440 | 365,740 | Bachelor's |
| Allergists and Immunologists | 29-1229.01 | IS | $265,930 | 342,720 | Post-doctoral |
| Urologists | 29-1229.03 | ISR | $265,930 | 342,720 | Post-doctoral |
| Physical Medicine and Rehabilitation Physicians | 29-1229.04 | ISR | $265,930 | 342,720 | Doctorate |
| Preventive Medicine Physicians | 29-1229.05 | IS | $265,930 | 342,720 | Post-doctoral |
| Sports Medicine Physicians | 29-1229.06 | ISR | $265,930 | 342,720 | Doctorate |
| Medical and Clinical Laboratory Technologists | 29-2011.00 | IRC | $62,930 | 332,940 | Bachelor's |
| Cytogenetic Technologists | 29-2011.01 | IRC | $62,930 | 332,940 | Bachelor's |
| Cytotechnologists | 29-2011.02 | IRC | $62,930 | 332,940 | Bachelor's |
| Histotechnologists | 29-2011.04 | IRC | $62,930 | 332,940 | Bachelor's |
| Nurse Practitioners | 29-1171.00 | ISC | $132,300 | 323,040 | Master's |
| Pharmacists | 29-1051.00 | ISC | $140,910 | 321,970 | Doctorate |
| Data Scientists | 15-2051.00 | IC | $120,230 | 262,440 | Bachelor's |
| Biofuels/Biodiesel Technology and Product Development Managers | 11-9041.01 | IER | $171,270 | 220,260 | Bachelor's |
| Software Quality Assurance Analysts and Testers | 15-1253.00 | ICR | $104,300 | 186,740 | Bachelor's |
| Neurodiagnostic Technologists | 29-2099.01 | IRC | $50,290 | 182,610 | Associate's (2-year) |
| Computer Network Architects | 15-1241.00 | ICR | $134,050 | 179,740 | Bachelor's |
| Medical Scientists, Except Epidemiologists | 19-1042.00 | IR | $103,410 | 172,340 | Doctorate |
| Microsystems Engineers | 17-2199.06 | IRC | $122,930 | 154,070 | Master's |
| Nanosystems Engineers | 17-2199.09 | IRC | $122,930 | 154,070 | Doctorate |
| Occupational Health and Safety Specialists | 19-5011.00 | ICR | $90,150 | 140,610 | Bachelor's |
| Financial Quantitative Analysts | 13-2099.01 | IC | $81,100 | 132,130 | Master's |
| Dentists, General | 29-1021.00 | IRS | $170,950 | 124,390 | Doctorate |
| Detectives and Criminal Investigators | 33-3021.00 | ICR | $93,790 | 114,430 | Vocational certificate |
| Intelligence Analysts | 33-3021.06 | ICE | $93,790 | 114,430 | Bachelor's |
| Web and Digital Interface Designers | 15-1255.00 | IAC | $104,000 | 113,330 | Bachelor's |
| Natural Sciences Managers | 11-9121.00 | IEC | $167,220 | 108,690 | Bachelor's |
| Clinical Research Coordinators | 11-9121.01 | ICE | $167,220 | 108,690 | Bachelor's |
| Water Resource Specialists | 11-9121.02 | IRC | $167,220 | 108,690 | Bachelor's |
| Operations Research Analysts | 15-2031.00 | IC | $88,940 | 108,510 | Master's |
| Environmental Scientists and Specialists, Including Health | 19-2041.00 | IRC | $82,220 | 89,250 | Bachelor's |
| Climate Change Policy Analysts | 19-2041.01 | IEC | $82,220 | 89,250 | Master's |
| Environmental Restoration Planners | 19-2041.02 | IRC | $82,220 | 89,250 | Bachelor's |
| Industrial Ecologists | 19-2041.03 | IRC | $82,220 | 89,250 | Master's |
| Veterinarians | 29-1131.00 | IR | $130,100 | 83,900 | Doctorate |
| Chemists | 19-2031.00 | IRC | $91,240 | 82,770 | Bachelor's |
| Aerospace Engineers | 17-2011.00 | IRC | $134,960 | 67,710 | Bachelor's |
| General Internal Medicine Physicians | 29-1216.00 | ISR | $256,560 | 67,150 | Post-doctoral |
| Chemical Technicians | 19-4031.00 | IRC | $60,390 | 57,540 | Bachelor's |
| Bioinformatics Scientists | 19-1029.01 | ICR | $98,920 | 55,850 | Master's |
| Molecular and Cellular Biologists | 19-1029.02 | ICR | $98,920 | 55,850 | Bachelor's |
| Geneticists | 19-1029.03 | ICR | $98,920 | 55,850 | Post-doctoral |
The table shows the 50 largest of 113 occupations with this code, ordered by U.S. employment.
Median wage is the employee annual median from BLS OES; it excludes self-employed workers and owners. “Not published” means BLS does not publish a median for that occupation — it is not zero.
“—” means O*NET does not publish a typical education level for that occupation; in O*NET Database 31.0 this field does not cover every occupation, though every row on this page has one. Where a level is given, it is the most common category in O*NET's education data, translated.
Wages and employment come from BLS OES, which publishes them by 6-digit SOC occupation. Several O*NET occupations can sit under one SOC code and share the same estimates — that is why some rows show identical wages and employment.
Of the 50 rows on this page, 4 are not a wage BLS publishes for that occupation itself: 0 use the number for the successor SOC code that absorbed the occupation, and 4 use the broader group BLS reports them under. The remaining rows are the median BLS publishes at the occupation's own 6-digit SOC level.
What these occupations mean
Every O*NET occupation carries an interest profile: six shares, one per RIASEC direction. O*NET turns that profile into the occupation's Interest High-Point (IH) code with the variable high-point rule: take the directions whose share is above .17, highest first, up to three (Rounds et al., 1999; Step 3 of the 2023 O*NET report “Using Machine Learning to Develop Occupational Interest Profiles and High-Point Codes”). That is why a code can have one, two or three letters. This page reports the codes as O*NET published them — the list describes these occupations, not you.
Your own code is generated by this product from your questionnaire scores, with a different rule: the three highest directions, with ties broken in a fixed order. The two sides also measure different things — the questionnaire asks what you like doing, while an occupation profile measures how much of that interest content the work involves. No study equates the two.
Three honest notes
- The occupation-side profiles are machine-generated: O*NET derived them with machine learning from work activities and related data (see the 2023 report “Using Machine Learning to Develop Occupational Interest Profiles and High-Point Codes”), not from analyst ratings.
- Even where an interest code carries some predictive signal, it is weak: it cannot tell whether a particular person will do a job well, and it does not predict income. An occupation-level profile also hides the differences between people doing the same job.
- Interests change with experience — courses, projects and internships can move them. A code is a snapshot, not a fixed trait.
Find your own code
The 60 items of the O*NET® Interest Profiler Short Form (adapted by this product) produce your own code and the occupations with the closest interest profiles, with the same U.S. wage data.
60 questions · free, no sign-up