Working at Tesoro Corporation | Glassdoor

Tesoro Corporation Overview

San Antonio, TX
5001 to 10000 employees
Company - Public (TSO)
Oil, Gas, Energy & Utilities
$10+ billion (USD) per year
Tesoro Corporation is a leading independent refiner and marketer of petroleum products that has been serving the fuel transportation needs of the western United States for more than 45 years. We are committed to safe, clean, reliable operations and creating shared value for the ... Read more

Mission: Every day we create a safer and cleaner future as efficient providers of reliable transportation fuel solutions.

Tesoro Corporation – Why Work For Us?

Vision Statement

Every day we create a safer and cleaner future as efficient providers of reliable transportation fuel solutions.

Who We Are

For more than 45 years, Tesoro has been serving the fuel transportation needs of the western United States. We are a leading independent refiner and marketer of petroleum products, committed to operating responsibly in the communities we serve. Headquartered in San Antonio, Texas, our operations extend across 18 states.

As crude oil sources, availability and costs shift, particularly in the United States, we aim to adapt to these market conditions in ways that benefit the long-term health of our business. We are expanding through strategic acquisition and organic growth, investing in capital projects and partnerships that will help lead to a successful future.

We are committed to delivering value to all of those invested in our success – the communities where we operate, our employees, our customers, our partners and our shareholders.


What We Do

Tesoro safely, efficiently and reliably operates an integrated network of strategic assets that create and sell refined petroleum products, from feedstock acquisition to wholesale, commercial and retail sales outlets.

At our refineries, Tesoro refines crude oil and other feedstocks into transportation fuels, such as conventional and CARB gasoline, diesel fuel, jet fuel and other petroleum products, including heavy fuel oils, liquefied petroleum gas, petroleum coke, calcined coke and asphalt.

Our marine operations charter U.S.- and foreign-flagged tankers to optimize the transportation of crude oil, other feedstocks and refined products within our refinery system.

Through our retail and marketing operations, Tesoro sells refined petroleum products in 17 states via commercial, wholesale and retail channels. Commercial marketing trades in commercial and military jet fuel and heavy fuel products. Our wholesale program markets gasoline and diesel fuel to independent marketers, commercial end-users and high-volume retailers. Our network of retail stations sells gasoline and diesel fuels and convenience products directly to consumers under the Tesoro®, Shell®, ARCO®, Exxon®, Mobil® and USA Gasoline™ brands.

Tesoro Corporation formed a master limited partnership, Tesoro Logistics LP(NYSE: TLLP), which has a significant presence in gathering, transporting, storing and distributing the crude and other feedstocks we refine. Tesoro Logistics LP assets include:

  • Twenty refined products terminals and storage facilities in the western United States,
  • Four marine terminals in California,
  • A rail-car unloading facility in Washington,
  • A petroleum coke handling and storage facility in California,
  • The High Plains system that gathers and transports crude oil produced in the Williston Basin, including production from the Bakken Shale formation,
  • The Northwest Product Pipeline that runs from Utah to Washington (including a 5-mile segment to the Salt Lake City International Airport), and
  • Other pipelines that transport products and crude oil from Tesoro’s refineries to nearby facilities in Utah and California.

Working at Tesoro

As a fast-growing energy industry leader and Fortune 100 company, we hire exceptional people with the passion to make a difference.



At Tesoro, our employees share an entrepreneurial spirit and a commitment to excellence that sets us apart from other companies in our industry. Our leaders welcome new ideas, encourage diverse perspectives and foster a collaborative team environment designed to optimize business performance while enhancing individual skills. Our high-performing culture is demonstrated daily by employees, both inside and outside the office.

We know Tesoro’s success is based on attracting and retaining the best talent. Our eligible employees enjoy:

  • Competitive pay and compensation packages, including Thrift 401(k) Plan matching and a Pension Plan,

  • Outstanding benefits.

  • Career development and training programs, and

  • Community service opportunities through our Team Tesoro volunteer program.

Our Refineries

We operate six refineries in the western United States with a combined capacity of 850,000 barrels per day.

Powered by the deep engineering expertise of our workforce, these highly advanced facilities refine domestic and foreign crude oils into transportation fuels and other petroleum products that help drive the markets we serve.

At our refineries – and everywhere we do business – the health and safety of our employees, customers and communities is our number one priority and an integral part of our culture. We continually evaluate and invest in technologies and systems to support safe, reliable and clean operations.






Our refineries are supplied by domestic feedstocks from Alaska (Cook Inlet and North Slope), California (San Joaquin Valley and Los Angeles Basin), Colorado, North Dakota, Utah and Wyoming, and from foreign feedstocks that include Canada, South America, West Africa and other foreign crudes.


Petroleum products refined at our facilities include: CARB and conventional gasoline, CARB and conventional diesel fuels, jet fuel, heavy fuel oils, liquefied petroleum gas, fuel gases, asphalt, propane, propylene, petroleum coke and calcined coke.


Our Business: 

We transport crude oil via pipeline, truck transport, and rail, in conjunction with Tesoro's Maritime group, to Tesoro's refineries and transport refined products to Tesoro's customers.  Logistics ensures these hazardous liquids are transported to their destinations in a safe, legal, and cost effective manner.  Specialized aspects of this transportation are handled by staff with expertise in applicable areas such as Operations, Engineering, Environmental, Personnel Safety, Right-of-Way, and Hazardous Material Transportation Safety.



Tesoro Logistics LP owns and operates a network of over 3,500 miles of crude oil, refined products and natural gas pipelines. TLLP also owns and operates 28 crude oil and refined products truck and marine terminals and has over 9 million barrels of storage capacity. In addition, TLLP owns and operates four natural gas processing complexes and one fractionation facility.

Interns and Recent Graduates

Tesoro actively seeks students interested in Internships and recent college graduates ready to launch their careers for all areas of our business.

Current Internship Opportunities >


Through our University Relations & Recruiting Program, we hire exceptional individuals from diverse backgrounds with an interest in the energy industry, whose personal values align with contributing to a high-performing culture. Tesoro recruits students and recent graduates who are passionate about their work, demonstrate organizational and problem-solving skills, have strong verbal and written communication skills and can adapt well to change.

Internship Program

Tesoro’s interns expand their knowledge and gain a stronger understanding of business practices and their major through:

  • Experiential learning
  • Personal and professional development
  • Networking
  • Corporate culture engagement

Minimum qualifications:

  • Must be enrolled in a 4-year college or university
  • 3.0 minimum GPA strongly preferred

Benefits include:

  • Competitive pay
  • Company paid holidays
  • Thrift 401(k) Plan eligibility
  • Wellness programs (excluding benefit incentives)

Tesoro Corporation Reviews

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Tesoro Corporation President & CEO Gregory J. Goff
Gregory J. Goff
86 Ratings
  • "Working at Tesoro"

    • Work/Life Balance
    • Culture & Values
    • Career Opportunities
    • Comp & Benefits
    • Senior Management
    Current Employee - Delivery Driver in Los Angeles, CA
    Current Employee - Delivery Driver in Los Angeles, CA
    Neutral Outlook
    No opinion of CEO

    I have been working at Tesoro Corporation full-time (More than 10 years)


    Good pay good benefits long hours


    Safety procedures are enforced when something goes wrong results come first.
    If your a bad employee rope to hang your self is passed out by the spool until they get fed up and fire you for something minor.

    Advice to Management

    Follow safety procedures and stop making up new ones that don't make sense spend some time in the field so you can learn how things work.

See All 180 Reviews

Tesoro Corporation Photos

Tesoro Corporation photo of: Los Angeles Refinery
Tesoro Corporation photo of: Alaska Refinery
Tesoro Corporation photo of: Vinvale - Tyrone
Tesoro Corporation photo of: Los Angeles Refinery
Tesoro Corporation photo of: Tesoro Alaska
Tesoro Corporation photo of: Los Angeles Refinery
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Tesoro Corporation Interviews



Getting an Interview

Getting an Interview





    Accepted Offer
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    Average Interview


    I applied through an employee referral. I interviewed at Tesoro Corporation.


    Went through a phone interview and an in person interview. During the interview some of the time was spent learning about the position and then questions about previous employment and skills.

    Interview Questions

    • Typical interview questions. Strengths, weaknesses, questions about the job description.   Answer Question
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Tesoro Corporation Awards & Accolades

  • Fortune 500, Fortune, 2015
  • Top Workplace, San Antonio Express-News, 2012
  • Barron's 500, Barron's, 2009
  • Top Intern Employers, CollegeGrad, 2008
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