DOL Verified Employer

Liberty Oilfield Services LLC - Petroleum Engineers

Government-verified salary data from 66 US Department of Labor filings.

Median Salary
$82,571
18 DOL filings
CO Approval Rate 81.8% · most recent FY 2025
Median Salary
$82,571
Certified filings
DOL Filings
18
Certified: 54
Unique Job Titles
21
SOC occupations
Approval Rate
81.8%
Certified vs filed

Salary Range

Based on 18 certified filings
DOL-Filed Salary Range
$55,000$55,000$82,571$123,600$134,555
Prevailing Wage Premium - a TruthWage exclusive
-4.6%

Liberty Oilfield Services LLC pays close to the DOL minimum wage floor for its filed positions.

The prevailing wage is the minimum salary DOL sets as the floor for this occupation and location. A positive premium means the employer pays above that floor. Source: DOL LCA filings.

Salary Trend

FY2012 - FY2024

Salaries by Job Title

21 occupations with DOL-filed salary data
Job TitleFilingsMedian Salaryvs MarketSalary Range
Petroleum Engineers 18 $82,571 -41.6%
$55,000$55,000$82,571$123,600$123,600
17-2171.00 11 $111,613 N/A
$107,610$107,610$111,613$125,000$125,000
Mechanical Engineers 6 $90,250 -11.8%
$80,000$80,000$90,250$95,790$95,790
Sales Engineers 4 $102,125 -16%
$89,250$89,250$102,125$115,000$115,000
11-9041.00 3 $166,375 N/A
$153,837$153,837$166,375$497,000$497,000
41-9031.00 3 $140,000 N/A
$130,000$130,000$140,000$154,452$154,452
Transportation, Storage, and Distribution Managers 2 $129,275 +26.7%
$120,000$120,000$129,275$138,549$138,549
Architectural and Engineering Managers 2 $262,500 +56.5%
$150,000$150,000$262,500$375,000$375,000
Statisticians 2 $81,000 -21.6%
Insufficient data for salary range.
17-2051.00 2 $99,222 N/A
$96,608$96,608$99,222$101,837$101,837
17-2141.00 2 $97,168 N/A
$89,336$89,336$97,168$105,000$105,000
19-4041.01 2 N/A N/A
Insufficient data for salary range.
11-3051.00 1 $87,000 N/A
Insufficient data for salary range.
Accountants and Auditors 1 $120,000 +46.9%
Insufficient data for salary range.
15-2051.01 1 N/A N/A
Insufficient data for salary range.
Civil Engineers 1 $95,936 -3.7%
Insufficient data for salary range.
Electrical Engineers 1 N/A N/A
Insufficient data for salary range.
Industrial Engineers 1 N/A N/A
Insufficient data for salary range.
Engineers, All Other 1 $94,000 -20.2%
Insufficient data for salary range.
Mechanical Engineering Technologists and Technicians 1 N/A N/A
Insufficient data for salary range.
19-5011.00 1 $58,560 N/A
Insufficient data for salary range.

Individual DOL Filings for Petroleum Engineers at Liberty Oilfield Services LLC

DateSalaryPrevailing WageLevelLocationEducationStatusSource
Oct 2023 $105,000 $90,397 - Midland TE Bachelor's Certified-Expired PERM
Aug 2019 $131,602 $131,602 - Denver CO N/A Certified LCA
Aug 2019 $131,602 $131,602 - Denver CO N/A Withdrawn LCA
Jun 2018 $123,600 $100,131 - GILLETTE WY N/A Certified LCA
Jun 2017 $120,000 $111,966 - Gillette WY Master's Certified PERM
May 2017 $134,555 $134,555 - Denver CO Bachelor's Certified PERM
Mar 2017 $120,000 $111,966 - Gillette WY Master's Withdrawn PERM
May 2016 $93,142 $93,142 - DENVER CO N/A Certified LCA
Mar 2013 $72,000 $61,984 - WILLISTON ND N/A Certified LCA
May 2012 $55,000 $54,787 - WILLISTON ND N/A Certified LCA
May 2012 $55,000 $54,787 - WILLISTON ND N/A Certified LCA
May 2012 $55,000 $54,787 - WILLISTON ND N/A Certified LCA
Mar 2012 $55,000 $54,787 - WILLISTON ND N/A Certified LCA

DOL data does not contain worker names. Only employer, salary, and job details are shown.

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Source: US Department of Labor, Office of Foreign Labor Certification (OFLC) public disclosure files (PERM Form ETA-9089 and LCA Form ETA-9035), and US Bureau of Labor Statistics Occupational Employment and Wage Statistics (OEWS). Salary figures represent employer filings and government survey estimates, not individual worker pay.

Data covers DOL filings from 2012 to 2025.