| # | Company | Employees |
|---|---|---|
| 1 |
H&Phelmerichpayne.com
Provider of advanced drilling technologies and solutions enhancing productivity, reliability, safety, and efficiency in land, international, and offshore operations. |
11,576 |
| 2 |
Williamswilliams.com
Provides transport, storage, and delivery solutions for clean energy, operating critical infrastructure to support a low-carbon energy future. |
6,995 |
| 3 | 6,516 | |
| 4 |
T.D. Williamsontdwilliamson.com
The company provides innovative solutions for pipeline operators worldwide to maximize uptime, improve throughput, minimize risk, and address regulatory climate challenges |
1,872 |
| 5 |
Zeeco, Inc.zeeco.com
A global leader in combustion and environmental solutions for various industries, specializing in ultra-low emission burners, flaring systems, and waste incineration |
1,812 |
| 6 |
Cypress Environmental Partnerstirusa.com
Nationally recognized environmental services company offering inspection, integrity, and water treatment solutions to support energy, water, and civil infrastructure sectors in the US |
963 |
| 7 |
John Zinkjohnzink.com
Global leader in environmental solutions for various industries, specializing in engineered vapor and combustion systems with Smart Combustionโข technology for optimized performance and efficiency |
869 |
| 8 |
Tulsa Inspection Resources, LLCtirusa.com
This company offers inspection services, non-destructive examination, and pipeline integrity support to energy, civil, and municipal water industries in the US |
866 |
| 9 |
Magellan Midstream Partnersmagellanlp.com
A publicly traded partnership transporting, storing, and distributing refined petroleum products and crude oil with a focus on safety, efficiency, and responsibility |
799 |
| 10 |
NGL Energy Partners LPnglenergypartners.com
A vertically integrated MLP in the midstream energy sector, providing transportation, storage, blending, and marketing services for crude oil, NGLs, refined products, and water solutions |
627 |
| 11 |
Pipeliners 798local798.org
Trade union offering top-quality pipeline welders to contractors nationwide |
522 |
| 12 |
Unit Corporationunitcorp.com
Diversified energy company involved in oil and gas exploration, production, property acquisition, and onshore drilling in the Mid-Continent region Headquarters in Tulsa, OK |
451 |
| 13 |
Summit ESPsummitesp.com
A service provider offering integrated Electric Submersible Pumping systems to optimize production, reduce costs, and increase profitability in the artificial lift industry |
448 |
| 14 |
Page Not Active - H&P Technologieshpinc.com
A division of H&P, find us on LinkedIn under the handle @Helmerich-Payne for more information |
431 |
| 15 |
Frontier Integrity Solutionsfrontierintegrity.com
A strategic inspection provider offering progressive Inspector development, prioritizing retention and cost sensitivity, providing value-added services with integrity and commitment 24/7 |
392 |
| 16 |
Vital Energycrescentenergyco.com
An independent energy company based in Tulsa, focused on acquiring, exploring, and developing oil and natural gas properties in the Permian Basin |
385 |
| 17 |
American Piping Inspectionamericanpipinginspection.com
Established in 2006, this company offers NDE/NDT, Level III services, welder certification, 3rd party inspection, and construction services in multiple states |
325 |
| 18 |
Latshaw Drillinglatshawdrilling.com
A leading drilling contractor in the USA focused on providing equipment and services to help America achieve energy independence |
320 |
| 19 |
Reliance Oilfield Servicesrelianceofs.com
A company focused on extraordinary service, community impact, and employee support, prioritizing people over profits and creating a positive workplace culture |
302 |
| 20 |
American Cementing, LLCamericancementing.com
Hiring opportunities available in all 8 districts for various positions Join a dynamic team and be part of our growth |
184 |
| 21 |
Access Midstream
Access Midstream was a company acquired by Williams in 2015, specializing in midstream services for the energy industry |
182 |
| 22 |
FW Murphy Production Controlsfwmurphy.com
The company provides engine management solutions, control systems, and services for the Oil & Gas Production and Natural Gas Compression Markets globally |
169 |
| 23 |
LENA (formerly Linde Process Plants, Inc.)leamericas.com
A merged company specializing in process plants and engineering services, striving to better serve customers and partners with diverse tools and talents |
166 |
| 24 |
Rose Rock Midstreamsemgroupcorp.com
Specializing in crude oil gathering, transportation, storage, and marketing, this company operates in top resource plays in North America |
153 |
| 25 |
Integrated Service Company LLCinservusa.com
Providing field, construction, manufacturing, tank, inspection, scaffolding, and heater services for refining and petrochemical industries in Tulsa. |
141 |
| 26 | 101 | |
| 27 |
Arrow Engine and Compression Companyarrowengine.com
A leading provider of natural gas engines, compressors, and production equipment, focused on reliability, exceptional customer service, and innovation |
72 |
| 28 |
Nadel and Gussman, LLCnadelgussman.com
A multi-generation family-owned oil and gas production company with operations in multiple US states, focusing on ethical transactions and modern oil innovations |
55 |
| 29 |
DMI International, LLC.dmiinternational.com
Manufacturer and supplier of construction and maintenance equipment for the pipeline industry, offering quality products, engineering expertise, and world class service globally |
53 |
| 30 |
Sanguine Gas Explorationsanguinegasexploration.com
A private energy company specializing in locating and developing oil and gas assets in Texas and Oklahoma |
44 |
| 31 |
BRG Energy Inc.brgcorp.com
A privately held oil and gas company in Tulsa, Oklahoma, focused on low-risk drilling and acquiring producing properties in Oklahoma and Texas |
39 |
| 32 |
Whiptail Midstreamwhiptailmidstream.com
A full-service midstream provider in Tulsa, Oklahoma, offering gas gathering, NGL fractionation, crude and water storage, and transportation services |
16 |
| 33 |
Tranam Systems Internationaltranam.com
Oil & energy company headquartered in Tulsa, Oklahoma, specializing in various aspects of the oil and energy industry on an international scale |
13 |
| 34 |
Resolute Engineering, LLCresolute-engineering.com
Resolute Engineering provides comprehensive engineering, design, project management, and construction management services for a wide range of projects in the energy industry |
9 |
| 35 |
PROTEGE ENERGY III LLCprotege-energy.com
Independent oil and gas exploration and production company with emphasis on US shale and conventional plays, prioritizing safety and environmental responsibility through partnerships |
9 |
| 36 |
Triple Crown Energytriplecrownenergy.com
An independent energy company based in Tulsa, Oklahoma, specializing in acquiring, owning, and developing oil and gas properties across the US |
8 |
| 37 | 6 | |
| 38 |
Lone Cypress Energy Services, LLC.lonecypressenergyservices.com
Independent energy company in Tulsa, OK specializing in traditional and renewable infrastructure development, EPC contracting, project management, and system operations for accessible and sustainable energy solutions |
4 |
| 39 |
Graceson Engineeringgracesons.com
Specializing in upstream and midstream energy assets, with expertise in diverse fields beyond energy sectors |
4 |
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
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