Occupation AtlasPetroleum Engineers
O*NET · 17-2171.00
Petroleum Engineers
Devise methods to improve oil and gas extraction and production and determine the need for new or modified tool designs. Oversee drilling and offer technical advice.
Also called Certification Engineer · Completion Engineer · Completions Engineer · Design Engineer · Drilling Engineer · Engineer · Exploration Engineer · Gas Distribution Engineer
28 more
Gas Engineer · Gas Turbine Engineer · Logging Engineer · Mining and Oil Field Equipment Design Engineer · Mining and Oil Field Equipment Test Engineer · Mining and Oil Well Equipment Research Engineer · Mud Engineer · Natural Gas Analyst · Natural Gas Engineer · Oil and Gas Engineer · Oil Drilling Engineer · Oil Exploration Engineer · Oil Well Engineer · Operations Engineer · Petroleum Engineer · Petroleum Production Engineer · Petroleum Supply Specialist · Pipeline Engineer · Project Production Engineer · Project Reservoir Engineer · Prospecting Observer · Research Engineer · Reservoir Engineer · Reservoir Engineering Consultant · SQE · Supplier Quality Engineer (SQE) · Test Engineer · Well Surveying Engineer
Compare with another occupationCompare with Environmental Restoration Planners
Job Zone
- 1
- 2
- 3
- 4
- 5
Zone 4: Considerable Preparation Needed
Considerable preparation. Usually a bachelor's degree plus several years of work-related experience, knowledge, or training.
Job Zone is O*NET's rating of how much education, experience and training an occupation typically needs — a property of the work, not of anyone doing it.
Occupational interest profile
RICRealistic · Investigative · Conventional — the three strongest interests, in order
- R Realistic5.37
- I Investigative5.33
- C Conventional4.32
- E Enterprising3.04
- A Artistic1.92
- S Social1.78
RIASEC (Holland) interests on O*NET's 0–7 scale: what the work draws on, not what any individual prefers. Hover a row for what each dimension means.
Education and experience
The education level respondents say the job requires, and the most common answer for experience and training.
- Related work experience
- Over 6 years, up to and including 8 years (21%)
- On-site or in-plant training
- Over 3 months, up to and including 6 months (32%)
- On-the-job training
- Over 6 months, up to and including 1 year (26%)
Typically associated skills
All 35 O*NET skills, most important first. Importance (1–5) says how much a skill matters here; level (0–7) says how much of it the work calls for, with O*NET's example of a nearby level. Neither is a proficiency rating of a person.
- Reading ComprehensionbasicImportance 4.0Level 4.8Level 4 looks like: Understand an email from management describing new personnel policies
- Critical ThinkingbasicImportance 4.0Level 4.4Level 4 looks like: Evaluate customer complaints and determine appropriate responses
- WritingbasicImportance 3.9Level 4.3Level 4 looks like: Write an email to staff outlining new directives
- Complex Problem SolvingImportance 3.9Level 4.1Level 4 looks like: Redesign a floor layout to take advantage of new manufacturing techniques
- Active ListeningbasicImportance 3.9Level 4.0Level 4 looks like: Answer inquiries regarding credit references
- SpeakingbasicImportance 3.9Level 4.0Level 4 looks like: Interview applicants to obtain personal and work history
- Judgment and Decision MakingImportance 3.9Level 3.9Level 4 looks like: Evaluate a loan application for degree of risk
- Systems AnalysisImportance 3.9Level 3.9Level 4 looks like: Determine how a new piece of equipment will affect production rates
- Systems EvaluationImportance 3.9Level 3.9Level 4 looks like: Identify the reasons why a client might be unhappy with a product
- Active LearningbasicImportance 3.8Level 3.9Level 4 looks like: Determine the impact of new menu changes on a restaurant's purchasing requirements
- MonitoringbasicImportance 3.8Level 3.9Level 4 looks like: Monitor a meeting and revise the agenda to ensure important topics are discussed
- CoordinationImportance 3.6Level 3.8Level 4 looks like: Work with others to put a new roof on a house
Show the other 23
- Time ManagementImportance 3.6Level 3.8Level 4 looks like: Allocate the time of subordinates to projects for the coming week
- Social PerceptivenessImportance 3.6Level 3.6Level 4 looks like: Be aware of how a coworker's promotion will affect a work group
- SciencebasicImportance 3.4Level 4.0Level 4 looks like: Conduct product tests to ensure safety standards are met
- MathematicsbasicImportance 3.3Level 4.0Level 4 looks like: Calculate the square footage of a new home under construction
- PersuasionImportance 3.0Level 3.1Level 4 looks like: Convince a supervisor to purchase new office equipment
- InstructingImportance 3.0Level 3.0Level 2 looks like: Instruct a new employee in the use of a timekeeping system
- Learning StrategiesbasicImportance 3.0Level 3.0Level 2 looks like: Learn a different method of completing a task from a coworker
- Service OrientationImportance 3.0Level 3.0Level 2 looks like: Ask customers if they would like a cup of coffee
- Management of Personnel ResourcesImportance 2.9Level 3.5Level 4 looks like: Direct the activities of a road repair crew with minimal disruption of traffic flow
- NegotiationImportance 2.9Level 3.4Level 4 looks like: Contract with a wholesaler to sell items at a given cost
- Operations MonitoringImportance 2.9Level 3.1Level 4 looks like: Monitor machine functions on an automated production line
- Management of Material ResourcesImportance 2.8Level 2.9Level 2 looks like: Reserve a room for a management meeting
- Quality Control AnalysisImportance 2.6Level 2.6Level 2 looks like: Inspect a draft email for errors (e.g., grammar, punctuation)
- Management of Financial ResourcesImportance 2.5Level 2.5Level 2 looks like: Use available funds to buy office supplies and record the amount of the purchase
- Technology DesignImportance 2.3Level 2.3Level 2 looks like: Adjust exercise equipment for use by a customer
- TroubleshootingImportance 2.3Level 2.0Level 2 looks like: Identify the source of a leak by looking under a machine
- Operations AnalysisImportance 2.3Level 1.8Level 2 looks like: Select a printer for an office
- Operation and ControlImportance 2.1Level 2.0Level 2 looks like: Navigate the settings on an office printer to print on both sides of the paper
- ProgrammingImportance 1.9Level 1.1Level 2 looks like: Write a program to sort objects in a database
- Equipment SelectionImportance 1.9Level 1.0Level 2 looks like: Select a tool to adjust a loose part on a bicycle
- InstallationImportance 1.8Level 0.9
- Equipment MaintenanceImportance 1.1Level —
- RepairingImportance 1.0Level —
Tasks
13 core · 10 supplementalWhat people in this occupation do, as O*NET records it, core tasks first by importance (1–5).
- Specify and supervise well modification and stimulation programs to maximize oil and gas recovery.Importance 4.2
- Monitor production rates, and plan rework processes to improve production.Importance 4.1
- Analyze data to recommend placement of wells and supplementary processes to enhance production.Importance 4.0
- Direct and monitor the completion and evaluation of wells, well testing, or well surveys.Importance 4.0
- Assist engineering and other personnel to solve operating problems.Importance 4.0
- Develop plans for oil and gas field drilling, and for product recovery and treatment.Importance 4.0
- Maintain records of drilling and production operations.Importance 4.0
- Assess costs and estimate the production capabilities and economic value of oil and gas wells, to evaluate the economic viability of potential drilling sites.Importance 3.8
- Confer with scientific, engineering, and technical personnel to resolve design, research, and testing problems.Importance 3.8
- Interpret drilling and testing information for personnel.Importance 3.7
- Coordinate activities of workers engaged in research, planning, and development.Importance 3.7
- Write technical reports for engineering and management personnel.Importance 3.6
Show the other 11
- Evaluate findings to develop, design, or test equipment or processes.Importance 3.5
- Test machinery and equipment to ensure that it is safe and conforms to performance specifications.Importance 4.1
- Assign work to staff to obtain maximum utilization of personnel.Importance 4.0
- Simulate reservoir performance for different recovery techniques, using computer models.Importance 3.8
- Design and implement environmental controls on oil and gas operations.Importance 3.7
- Supervise the removal of drilling equipment, the removal of any waste, and the safe return of land to structural stability when wells or pockets are exhausted.Importance 3.7
- Inspect oil and gas wells to determine that installations are completed.Importance 3.6
- Coordinate the installation, maintenance, and operation of mining and oil field equipment.Importance 3.5
- Take samples to assess the amount and quality of oil, the depth at which resources lie, and the equipment needed to properly extract them.Importance 3.4
- Design or modify mining and oil field machinery and tools, applying engineering principles.Importance 3.1
- Conduct engineering research experiments to improve or modify mining and oil machinery and operations.Importance 3.1
Knowledge
Bodies of knowledge the work draws on.
- Engineering and TechnologyImportance 4.4Level 5.3Level 4 looks like: Design a custom office chair
- MathematicsImportance 4.1Level 5.0Level 4 looks like: Analyze data to determine areas with the highest sales
- Computers and ElectronicsImportance 3.5Level 4.0Level 4 looks like: Use a computer to format a document
- PhysicsImportance 3.5Level 4.6Level 4 looks like: Calculate the speed of a falling object
- Administration and ManagementImportance 3.4Level 4.1Level 4 looks like: Monitor progress of a project to ensure timely completion
- ChemistryImportance 3.4Level 4.4Level 4 looks like: Use the proper concentration of chlorine to purify a water source
- AdministrativeImportance 3.2Level 3.8Level 4 looks like: Type 30 words per minute
- Economics and AccountingImportance 3.2Level 3.5Level 4 looks like: Develop financial investment programs for individual clients
Show all 33
- English LanguageImportance 3.2Level 3.8Level 4 looks like: Edit an article for a news website
- DesignImportance 3.1Level 3.7Level 4 looks like: Design plans for remodeling a kitchen
- Law and GovernmentImportance 3.1Level 3.3Level 4 looks like: Prepare documents and title papers for the purchase of a new house
- MechanicalImportance 2.8Level 3.3Level 4 looks like: Replace a valve on a steam pipe
- Customer and Personal ServiceImportance 2.6Level 3.1Level 4 looks like: Be responsible for 10 children at daycare
- Public Safety and SecurityImportance 2.4Level 2.2Level 1 looks like: Use a seatbelt
- Education and TrainingImportance 2.3Level 3.1Level 4 looks like: Lead a quality improvement seminar
- Communications and MediaImportance 2.2Level 2.0Level 1 looks like: Write a thank you note
- GeographyImportance 2.2Level 3.0Level 4 looks like: Find a specific country on a world map
- Sales and MarketingImportance 2.2Level 2.3Level 1 looks like: Sell cakes at a bake sale
- Personnel and Human ResourcesImportance 2.1Level 2.4Level 1 looks like: Fill out a medical claim form
- Production and ProcessingImportance 2.0Level 2.0Level 1 looks like: Put a computer back into its packing materials
- TelecommunicationsImportance 2.0Level 1.5Level 1 looks like: Send an email
- TransportationImportance 2.0Level 2.0Level 1 looks like: Ride a train to work
- BiologyImportance 1.8Level 1.7Level 1 looks like: Feed domestic animals
- Building and ConstructionImportance 1.7Level 1.1Level 1 looks like: Choose the proper type of wood for adding a deck onto a house
- Foreign LanguageImportance 1.7Level 1.3Level 1 looks like: Say "please" and "thank you" in a foreign language
- PsychologyImportance 1.5Level 1.1Level 1 looks like: Monitor several children on a playground
- Sociology and AnthropologyImportance 1.2Level —
- Food ProductionImportance 1.1Level —
- History and ArcheologyImportance 1.1Level —
- Medicine and DentistryImportance 1.1Level —
- Philosophy and TheologyImportance 1.1Level —
- Therapy and CounselingImportance 1.1Level —
- Fine ArtsImportance 1.0Level —
Abilities
Enduring capacities the work calls for.
- Deductive ReasoningImportance 4.0Level 4.0Level 5 looks like: Decide what factors to consider in selecting stocks
- Inductive ReasoningImportance 4.0Level 4.0Level 4 looks like: Determine the prime suspect based on crime scene evidence
- Oral ComprehensionImportance 4.0Level 4.1Level 4 looks like: Understand a coach's oral instructions for a sport
- Oral ExpressionImportance 4.0Level 4.6Level 4 looks like: Give instructions to a lost motorist
- Problem SensitivityImportance 4.0Level 4.0Level 4 looks like: Notice from a subtle difference in a client's mood that something is bothering them
- Written ComprehensionImportance 4.0Level 4.6Level 4 looks like: Understand an apartment lease
- Written ExpressionImportance 4.0Level 4.6Level 4 looks like: Write a job recommendation for a subordinate
- Category FlexibilityImportance 3.9Level 4.0Level 3 looks like: Classify flowers according to size, color, and smell
Show all 52
- Fluency of IdeasImportance 3.8Level 4.0Level 4 looks like: Think of as many ideas as possible for the name of a new company
- Information OrderingImportance 3.8Level 4.0Level 2 looks like: Follow the correct steps to make change
- Near VisionImportance 3.6Level 3.8
- Speech ClarityImportance 3.5Level 3.3Level 4 looks like: Make stadium-wide announcements during a sporting event
- Speech RecognitionImportance 3.5Level 3.3Level 4 looks like: Identify a former customer's voice over the phone
- OriginalityImportance 3.4Level 3.9Level 4 looks like: Redesign job tasks to be interesting for employees
- Mathematical ReasoningImportance 3.3Level 3.9Level 4 looks like: Decide how to calculate profits to determine the amounts of yearly bonuses
- VisualizationImportance 3.3Level 3.3Level 4 looks like: Follow a diagram to assemble a metal storage cabinet
- Number FacilityImportance 3.1Level 3.3Level 3 looks like: Calculate a discounted price
- Selective AttentionImportance 3.1Level 3.0Level 2 looks like: Answer a business call with coworkers talking nearby
- Flexibility of ClosureImportance 3.0Level 3.0Level 2 looks like: Detect that your phone is ringing while at a concert
- Perceptual SpeedImportance 3.0Level 3.0Level 2 looks like: Sort mail according to ZIP codes with no time pressure
- Far VisionImportance 2.9Level 3.0Level 2 looks like: Read a roadside billboard
- Time SharingImportance 2.9Level 2.9Level 3 looks like: Watch street signs while driving at 30 miles an hour
- Speed of ClosureImportance 2.8Level 3.0Level 3 looks like: Recognize a song after hearing only the first few notes
- MemorizationImportance 2.6Level 2.0Level 1 looks like: Remember the number on your bus to be sure you get back on the right one
- Visual Color DiscriminationImportance 2.6Level 2.8
- Hearing SensitivityImportance 2.4Level 2.3Level 2 looks like: Notice a doorbell ringing
- Finger DexterityImportance 2.1Level 1.5Level 2 looks like: Put coins in a parking meter
- Auditory AttentionImportance 2.0Level 2.0Level 2 looks like: Listen to a lecture while people nearby are talking
- Depth PerceptionImportance 2.0Level 2.0Level 2 looks like: Merge a car into traffic on a city street
- Control PrecisionImportance 1.8Level 1.3Level 2 looks like: Adjust a room light with a dimmer switch
- Multilimb CoordinationImportance 1.5Level 0.6
- Trunk StrengthImportance 1.4Level 0.6
- Reaction TimeImportance 1.1Level —
- Spatial OrientationImportance 1.1Level —
- Wrist-Finger SpeedImportance 1.1Level —
- Arm-Hand SteadinessImportance 1.0Level —
- Dynamic FlexibilityImportance 1.0Level —
- Dynamic StrengthImportance 1.0Level —
- Explosive StrengthImportance 1.0Level —
- Extent FlexibilityImportance 1.0Level —
- Glare SensitivityImportance 1.0Level —
- Gross Body CoordinationImportance 1.0Level —
- Gross Body EquilibriumImportance 1.0Level —
- Manual DexterityImportance 1.0Level —
- Night VisionImportance 1.0Level —
- Peripheral VisionImportance 1.0Level —
- Rate ControlImportance 1.0Level —
- Response OrientationImportance 1.0Level —
- Sound LocalizationImportance 1.0Level —
- Speed of Limb MovementImportance 1.0Level —
- StaminaImportance 1.0Level —
- Static StrengthImportance 1.0Level —
Work activities
Kinds of activity the work is made of.
- Analyzing Data or InformationImportance 4.6Level 5.3Level 4 looks like: Determine the interest cost to finance a new building
- Making Decisions and Solving ProblemsImportance 4.5Level 5.3Level 4 looks like: Select the location for a major retail store
- Getting InformationImportance 4.4Level 5.1Level 4 looks like: Review a budget
- Identifying Objects, Actions, and EventsImportance 4.4Level 5.1Level 4 looks like: Judge the suitability of food products for an event
- Working with ComputersImportance 4.4Level 4.3Level 4 looks like: Write software for keeping track of parts in inventory
- Organizing, Planning, and Prioritizing WorkImportance 4.2Level 5.6
- Processing InformationImportance 4.2Level 5.5Level 4 looks like: Calculate the adjustments for insurance claims
- Communicating with People Outside the OrganizationImportance 4.1Level 4.5Level 4 looks like: Present information to potential clients about available services
Show all 41
- Communicating with Supervisors, Peers, or SubordinatesImportance 4.1Level 5.3Level 4 looks like: Report the results of a sales meeting to a supervisor
- Developing Objectives and StrategiesImportance 4.1Level 4.6Level 4 looks like: Develop the plan to complete the merger of two organizations over a 3-year period
- Thinking CreativelyImportance 4.1Level 5.4Level 4 looks like: Adapt popular music for a high school marching band
- Establishing and Maintaining Interpersonal RelationshipsImportance 4.0Level 4.8Level 4 looks like: Maintain good working relationships with almost all coworkers and clients
- Updating and Using Relevant KnowledgeImportance 4.0Level 5.3Level 4 looks like: Keep current on changes in maintenance procedures for repairing sports cars
- Estimating the Quantifiable Characteristics of Products, Events, or InformationImportance 3.8Level 4.3Level 4 looks like: Estimate the time required to evacuate a city in the event of a major disaster
- Scheduling Work and ActivitiesImportance 3.8Level 4.1Level 4 looks like: Prepare the work schedule for salesclerks in a large retail store
- Coordinating the Work and Activities of OthersImportance 3.7Level 4.8Level 4 looks like: Organize the cleanup crew after a major sporting event
- Documenting/Recording InformationImportance 3.7Level 4.5Level 4 looks like: Document the results of a crime scene investigation
- Interpreting the Meaning of Information for OthersImportance 3.7Level 4.6Level 4 looks like: Interpret how foreign tax laws apply to U.S. exports
- Judging the Qualities of Objects, Services, or PeopleImportance 3.7Level 4.5Level 4 looks like: Determine the value of property lost in a fire
- Providing Consultation and Advice to OthersImportance 3.7Level 5.4Level 4 looks like: Recommend a new software package to increase operational efficiency
- Resolving Conflicts and Negotiating with OthersImportance 3.6Level 4.6Level 4 looks like: Get two subordinates to agree about vacation schedules
- Developing and Building TeamsImportance 3.4Level 3.6Level 4 looks like: Lead an assembly team in an automobile plant
- Evaluating Information to Determine Compliance with StandardsImportance 3.4Level 4.2Level 4 looks like: Evaluate a complicated insurance claim for compliance with policy terms
- Monitoring and Controlling ResourcesImportance 3.4Level 3.9Level 4 looks like: Work as a chef responsible for ordering food for the menu
- Monitoring Processes, Materials, or SurroundingsImportance 3.3Level 4.8Level 4 looks like: Test electrical circuits
- Guiding, Directing, and Motivating SubordinatesImportance 3.2Level 3.8Level 4 looks like: Manage a small team of employees in a dynamic workplace
- Drafting, Laying Out, and Specifying Technical Devices, Parts, and EquipmentImportance 2.8Level 3.9Level 4 looks like: Specify the furniture and equipment for a new school
- Performing Administrative ActivitiesImportance 2.8Level 3.3Level 4 looks like: Complete tax forms for a small business
- Selling or Influencing OthersImportance 2.8Level 3.4Level 4 looks like: Make a sales pitch to convince others to buy a product
- Inspecting Equipment, Structures, or MaterialsImportance 2.7Level 3.1Level 4 looks like: Inspect equipment in a chemical processing plant
- Coaching and Developing OthersImportance 2.6Level 3.2Level 4 looks like: Provide on-the-job training for administrative workers
- Training and Teaching OthersImportance 2.5Level 2.7
- Staffing Organizational UnitsImportance 2.4Level 2.6
- Assisting and Caring for OthersImportance 2.1Level 2.4Level 1 looks like: Help a coworker complete an assignment
- Controlling Machines and ProcessesImportance 1.6Level —
- Performing General Physical ActivitiesImportance 1.5Level 1.1Level 1 looks like: Walk between workstations in a small office
- Repairing and Maintaining Electronic EquipmentImportance 1.5Level —
- Handling and Moving ObjectsImportance 1.4Level 0.9Level 1 looks like: Change settings on copy machines
- Operating Vehicles, Mechanized Devices, or EquipmentImportance 1.4Level —
- Performing for or Working Directly with the PublicImportance 1.4Level 2.3Level 1 looks like: Check tickets at a concert
- Repairing and Maintaining Mechanical EquipmentImportance 1.4Level —
Work context
The conditions most characteristic of the work, on O*NET's 1–5 context scale.
Technology
44 toolsSoftware used in this work. In demand: among the tools job postings for this occupation name most. Hot: often named in job postings across the economy.
In demand (4)
- Autodesk AutoCADhot
- Microsoft Excelhot
- Microsoft Office softwarehot
- Microsoft PowerPointhot
Hot (18; 4 more marked hot above)
- C#
- C++
- Eclipse IDE
- Google Analytics
- Linux
- Microsoft Access
- Microsoft Outlook
- Microsoft Project
- Microsoft Visio
- Microsoft Visual Studio
- Microsoft Word
- Oracle Database
- Oracle Java
- Python
- R
- SAP software
- SAS
- The MathWorks MATLAB
Other tools (22)
- Computer Modelling Group CMG STARS
- Dassault Systemes CATIA
- DFA Capital Management GEMS
- eProduction Solutions PanSystem
- Finite element analysis FEA software
- GeoGraphix ARIES Portfolio
- IBM Notes
- IHS Petra
- IHS QUE$TOR
- Landmark Graphics TOW/cs
- Neotec WELLFLO
- Oracle Primavera Systems
- Schlumberger ECLIPSE
- Schlumberger Petrel E&P
- Schlumberger PVTi
- Software development tools
- Structure query language SQL
- TERRASCIENCES TerraStation
- TIBCO Spotfire
- TRC Consultants PHDWin
- Web browser software
- Well Flow Dynamics Wellflow
Related occupations
O*NET's own list of the occupations most related to this one, closest first.
ESCO equivalents
From the official ESCO–O*NET crosswalk, strongest match first. A broader occupation takes in this one; a narrower one is a part of it.
Closest occupations
Compare any occupation →Other O*NET occupations whose importance ratings on the 35 skills both rate are nearest to this one's, with the biggest differences named. A plain rule, not a hidden score.
Environmental Restoration Planners
Average difference 0.2 points · Installation −0.8, Troubleshooting −0.7
O*NET · Zone 5 · Compare
Water/Wastewater Engineers
Average difference 0.2 points · Operations Analysis +1.0, Installation −0.8
O*NET · Zone 4 · Compare
Mining and Geological Engineers, Including Mining Safety Engineers
Average difference 0.2 points · Operations Analysis +0.8, Installation −0.8
O*NET · Zone 4 · Compare
Environmental Engineers
Average difference 0.2 points · Equipment Selection −0.9, Installation −0.8
O*NET · Zone 4 · Compare
Food Scientists and Technologists
Average difference 0.2 points · Installation −0.8, Management of Material Resources −0.8
O*NET · Zone 4 · Compare
Animal Scientists
Average difference 0.2 points · Installation −0.8, Equipment Selection −0.8
O*NET · Zone 5 · Compare
Water Resource Specialists
Average difference 0.2 points · Equipment Selection −0.9, Installation −0.8
O*NET · Zone 4 · Compare
Podiatrists
Average difference 0.2 points · Installation −0.8, Systems Analysis −0.8
O*NET · Zone 5 · Compare
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This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA), used under the CC BY 4.0 license; O*NET® is a trademark of USDOL/ETA. ESCO occupations and skills are from the European Commission's ESCO classification, and the occupation crosswalk is the official ESCO–O*NET mapping by the ESCO Secretariat with USDOL/ETA. This service uses the ESCO classification of the European Commission. BlissPoint Analytics has modified all or some of this information: skill, task and descriptor ratings are rounded to one decimal, and ESCO occupations show Job Zone and interests copied from a crosswalked O*NET occupation. USDOL/ETA has not approved, endorsed, or tested these modifications.