Chesapeake Energy
Chesapeake develops its onshore, geographically diverse base of unconventional oil and natural gas assets. It focuses on the Powder River Basin (Wyoming), Utica Shale (Ohio), Marcellus Shale (Pennsylvania), Haynesville Shale (Louisiana) and Eagle Ford Shale (Texas). The company also owns businesses that market oil and natural gas, and gather and compress natural gas.

More than 1,000 Phillips 66 employees can still call themselves Bartians, down from a high in 6,000, before Phillips merged with Conoco and moved its headquarters to Houston. ConocoPhillips is the world’s largest independent exploration and production company. A commitment to safety, operating excellence and environmental stewardship guide its operations.

Continental Resources
Continental, an independent oil and natural gas producer, is the largest leaseholder in the Bakken field of North Dakota and Montana. The Bakken is one of the premier oil and gas fields in the country. The company turned 50 this year, and CEO Harold Hamm has directed it the entire time.

Devon Energy
Devon focuses many projects offshore in the United States and Canada, but this independent producer has also doubled its onshore production in North America since 2011. Devon was founded in 1971 by John Nichols who, in 1950, created the first public oil and gas drilling fund registered with the Securities and Exchange Commission.

Enable Midstream Partners
Still relatively new to the industry (2013), Enable has an impressive lineup of what its employees manage and operate: 12,900 miles of gathering lines; 14 processing plants; 7,800 miles of interstate pipelines; 2,200 miles of intrastate pipelines; and 85 billion cubic feet of natural gas storage capacity.

EOG Resources
In 1999, EOG dropped its affiliation with Enron Oil and
Gas Co. and changed its name. EOG has grown remarkably by focusing on what are known as premium wells, which deliver solid returns even when crude oil is $40 per barrel and natural gas is $2.50 per cubic foot.

Magellan Midstream Partners
Magellan owns the longest refined petroleum products pipeline system in the country (9,700 miles) and can tap into nearly 50 percent of the nation’s refining capacity. With an aggregate storage capacity of about 26 million barrels of oil, Magellan has access to 53 connected terminals and 27 independent terminals.

OGE Energy
OGE, founded in 1902, is the parent company of Oklahoma Gas and Electric (OG&E). It is the state’s oldest and largest investor-owned electric utility. Its power plants use natural gas, coal, wind and solar power and serve 830,000 customers in 276 municipalities across 30,000 square miles.

ONE Gas subsidiaries – Oklahoma Natural Gas, Kansas Gas Service and Texas Gas Service – are part of an evolving industry with changes that yield exciting opportunities. Customers trust ONE Gas to provide a safe, reliable source of natural gas, and they value that trust that is earned by the employees who strive to make it their business to satisfy customers.

Founded in 1906 as Oklahoma Natural Gas Co., an intrastate natural gas pipeline company, ONEOK reaches across the country, especially with its energy services operation, which focuses on marketing natural gas. The original ONG, along with other gas producers, spun off to become ONE Gas in 2014.

SandRidge Energy
SandRidge emerged from bankruptcy in October 2016 following the death of co-founder Aubrey McClendon six months earlier. SandRidge has focused its resources primarily in the Meramec formation in Major, Woodward and Garfield counties in Oklahoma (70,000 acres), along with the North Park basin in Jackson County, Colorado (125,000 acres).

Since successfully emerging from bankruptcy in 2009 as a publicly traded company, SemGroup focuses on manufacturing liquid asphalt; transporting and storing oil and natural gas; and gathering, processing and selling natural gas. SemGroup owns, operates, develops and acquires midstream energy assets throughout North America and the United Kingdom. SemGroup employs more than 1,100 people in its operations. SemGroup is led by CEO Carlin Conner, who has more than 24 years of experience in the energy industry. One of SemGroup’s major acquisitions in 2017 was the Houston Fuel Oil Terminal Co., one of the largest oil terminals in the United States.

T.D. Williamson
Founded in 1920, T.D. Williamson is the world’s most recognized name in pipeline equipment and services. With nearly 2,000 employees, TDW delivers safe integrity solutions globally for onshore and offshore applications, including hot tapping and plugging, pipeline cleaning, geometry and MFL inspection, pigging, and non-tethered plugging pig technology services. Employees at TDW enable the company to deliver exceptional customer value. That’s why the company’s commitment to employees is equally as important as its commitment to safety, quality and community.

Unit Corporation
Unit Corporation is a diversified energy company with three subsidiaries: Unit Drilling, Unit Petroleum and Superior Pipeline, which compete in the exploration for and production of oil and natural gas, contract drilling of onshore oil and natural gas wells, and acquisition of producing oil and natural gas properties.

Williams Companies
The Tulsa headquarters oversees an energy infrastructure that connects North America’s significant hydrocarbon resources to growing markets for natural gas and natural gas liquids. Founded in 1908, just after Oklahoma statehood, Williams owns and operates midstream gathering and processing assets, along with interstate natural gas pipelines.


Crafton Tull
Crafton Tull is a civil engineering, architecture, landscape architecture, planning and surveying firm focused on outstanding client service. Crafton Tull employs more than 200 professionals who deliver quality services to clients across the country. With two offices in Oklahoma and five in Arkansas, Crafton Tull has been an industry leader for more than 50 years.

Enviro Clean Cardinal/Cardinal Engineering
Enviro Clean Cardinal is an environmental and civil engineering service firm along the Gulf Coast and throughout the Midwest. Enviro Clean’s executive team has decades of experience in many specialties, from air-quality practices to hydrogeology. Corporate sibling Cardinal, a civil engineering powerhouse, provides transportation design, land planning, utility study and design, and site development.

Guy Engineering Services
Guy Engineering began as Willard Engineering, focusing on hydrology and hydraulics and contracting with the Tulsa district office of the U.S. Army Corps of Engineers. Guy designs roads for the state of Oklahoma, its municipalities and all 77 counties. It also provides bridge inspections, surveying and mapping services.

Linde Engineering North America
Linde Engineering North America in Tulsa is a subsidiary of the Linde Engineering Division, and is operational headquarters for administrative and operational services in North America. The Tulsa location provides technology, engineering, procurement and construction services to companies specializing in gas processing, refining, petrochemicals and deep cryogenics.

Wallace Engineering
Wallace Engineering’s offices in Tulsa and Oklahoma City were nominated as great places to work, but the company as a whole says it operates as a series of separate offices. Instead, each office is a part of the whole, bringing together the cream of the crop in engineers, technicians and support personnel in the structural and civil engineering industry.

‘Employee empowerment’ isn’t just a trendy phrase

The Saylor Foundation says “many businesses … looking to improve employee productivity and their overall performance believe that empowering employees will help them achieve this organizational goal.” Empowering employees is being recognized as an important part of management that means improved productivity, satisfaction, collaboration and quality of work.

For example, several on our Great Companies to Work For list cite empowerment as a main segment of their employee programs, including Regent Bank, which allowed its employees to collaborate and come up with a company approach to customer service, and Red Crown Credit Union, which started in 1938 because an employee of Stanolind Oil & Gas Company used a shoe box in a desk drawer to “bank” employees’ funds.