Working at Tesoro Corporation | Glassdoor

Tesoro Corporation Overview

San Antonio, TX
10000+ employees
Company - Public
Oil & Gas Exploration & Production
$10+ billion (USD) per year
Andeavor is a premier, highly integrated marketing, logistics and refining company. We maintain an unwavering commitment to safety, support our communities, empower our exceptional people, work diligently to protect the environment and aim to achieve the extraordinary. Learn ... 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?

Our name might be changing but the essential principles that got us here will remain the same as we move forward. We'll continue to view every day as an opportunity to work together to bring out the best in each other. 

We continue to build a team of employees that reflect the communities where we operate and the markets from which we recruit. Andeavor embraces and promotes a culture that values diversity, entrepreneurial leadership and provides equal opportunities in order to bring out the best in one another.

Underpinning the pillars of our business are our Strategic Priorities: Operational efficiency and effectiveness; value chain optimization across our system; financial discipline; value-driven growth; and a High-Performing Culture built around collaboration.  
We believe that exceptional performance is the result of simple and thoughtful improvements every day. We are determined to be better today than yesterday, and better tomorrow than today. 
Safety is and always will be a Core Value at Andeavor. We will continue to strive to achieve our ultimate goal of an incident-free workplace - for ourselves, for the families that sustain us and for the communities that surround us. 

We remain dedicated to fostering mutually beneficial relationships in the communities where we operate, investing resources to make a positive difference in the lives of others through education, public safety and environmental sustainability. Our commitment to Shared Value motivates us to be active, involved neighbors - not only as a company, but as individuals. Investing in our communities has always been core to who we are, and that will remain. 

On June 1, 2017, Tesoro acquired Western Refining and announced that the company would adopt a new name, Andeavor, effective August 1, 2017. The change in our name has its roots in our decision some years ago to create a special company, one that delivers ever greater value to all our stakeholders by bringing out the best in each other.

Our rapid evolution, growth and improved performance driven by the extraordinary efforts of our employees and the addition of outstanding talent and assets, has transformed our company. Our new name acknowledges the significant progress we have made and signals our aspiration to continue establishing Andeavor as a premier refining, marketing and logistics company. We aim to be better in every way - for our people, our customers, our shareholders, our business partners and our communities.

While we’ve changed our name, it's important to note that some things have not changed, such as our steadfast commitments to safety, environmental responsibility, and to being a good employer and responsible member of the communities where we operate.

Our new company name, Andeavor, is a custom-created word that acknowledges the transformational journey we've been on. It benefits from similarity to the word "endeavor" - making it easy to say and remember, but it has been evolved to reflect the upward direction and aspiration. Andeavor evokes our journey toward making a difference, and is also a promise to keep improving, keep evolving and keep delivering ever-greater value to all our stakeholders.

With our acquisition of Western Refining, we have approximately 1.2 million barrels of refining capacity, 13,000 employees, more than 3,000 retail locations, an extensive logistics system, a track record of performance and a solid platform for growth for years to come. We believe our transformation is an opportunity to redefine ourselves in a way that captures the spirit of how far we've come and what we still hope to achieve.

We hope that you come to see Andeavor as a sign of our aspiration to make our company better in every way.

Andeavor, formerly Tesoro, was founded in the 1960s as a company primarily engaged in petroleum exploration and production. The Company built its Kenai, Alaska refinery in 1969 and began shifting its focus to refining and marketing in the late 1990s. Since 2010, through strategic growth, financial discipline, strong execution and the commitment of its employees, Andeavor has become one of the leading independent refining, marketing and logistics companies in the United States.

  • 1968: Tesoro Corporation founded
  • 1969: Began operating the Kenai Refinery
  • 1998: Acquired the Anacortes Refinery
  • 2001: Acquired the Salt Lake City Refinery and the Mandan Refinery
  • 2002: Acquired the Martinez Refinery
  • 2007: Acquired the Los Angeles Refinery – Wilmington operations and USA Gasoline™ brand and retail sites
  • 2007-2010: Acquired 300 existing Shell®-branded wholesale supply contracts, expanding operations to a total of 650 Shell®-branded sites
  • 2011: Formed Tesoro Logistics LP, a master limited partnership that owns, operates, develops and acquires logistics assets to gather crude oil and distribute, transport and store crude oil and refined products
  • 2013: Expanded Los Angeles Refinery with acquisition of Carson operations. Acquired ARCO® brand, ampm® master franchisee license and approximately 800 dealer-operated sites. Secured rights from ExxonMobil to use the Exxon® and Mobil® brands at retail stations in select regions
  • 2014: Established the Tesoro Foundation to advance the Company’s philanthropic mission to create cleaner, safer, well-educated communities where we operate. Acquired QEP Field Services, making Tesoro Logistics a full-service logistics company
  • 2015: Acquired wholesale marketing and logistics assets in Anchorage and Fairbanks, Alaska. Acquired crude oil pipelines, gathering system, transportation, storage and rail loading facilities in the Williston Basin of North Dakota
  • 2016: Acquired the Dickinson Refinery and associated logistics assets in North Dakota. Acquired Virent, an innovative renewable fuels and chemicals company, to support bringing biofuels technology to commercial scale.
  • 2017: Acquired Western Refining and announced that on August 1, 2017, Tesoro would become Andeavor, a premier, highly integrated and geographically diversified refining, marketing and logistics company in the western United States.

At Andeavor, we rely on our Vision, Strategic Priorities and Guiding Principles to inform the way we conduct business. We set high expectations for employees at every level, and this helps us to operate as a trusted and valued business partner, a good corporate citizen and a successful Company.


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

Strategic Priorities

  • Improving operational efficiency and effectiveness with a focus on:
    • Safety and reliability
    • Cost leadership
    • Business improvements
  • Driving optimization of our integrated value chain
  • Exercising financial discipline
  • Delivering value-driven growth
  • Creating a high-performing culture

Guiding Principles

  • Core Values – We act individually and collectively with the highest level of integrity and we are steadfast in our commitment to safety, health and the environment.
  • Exceptional People – We employ the best people and develop our capabilities and leadership to realize our objectives.
  • Shared Purpose – Everyone clearly understands and owns our Vision, strategy, how they fit and what they are expected to contribute.
  • Powerful Collaboration – We leverage the power of collaboration and our individual and collective expertise to create value and competitive advantage.
  • Superior Execution – We pursue and deliver our objectives with energy, passion and a sense of urgency to deliver industry-leading results.

Take Initiative. Make an Impact.

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

At Andeavor, 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 are in the process of updating and combining our career portals to reflect our new name. In the meantime, choose one of the links below to explore current opportunities at Andeavor.


Andeavor is committed to providing highly competitive benefits to all of our employees.

The following Summary Plan Descriptions (SPDs) provide participants with a condensed, simplified explanation of the complete official governing document(s) and/or insurance contracts. The SPD doesn’t cover every provision of the Plan. If this plan description is incomplete, or if there’s any inconsistency between the information provided here and the official plan texts, the provisions of the official plan texts will prevail.

The SPDs below are applicable to Andeavor employees working for legacy Tesoro subsidiary employers. Andeavor employees working for legacy Western subsidiary employers are eligible for benefits under separate programs.

You may download these SPDs from the links below or request a hard copy of a particular SPD by contacting our Employee Service Center at (866) 688-5465.

Tesoro Corporation Reviews

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Tesoro Corporation President & CEO Gregory J. Goff
Gregory J. Goff
86 Ratings
  • Helpful (2)

    "Solid foundation, great place to develop a good career"

    • Work/Life Balance
    • Culture & Values
    • Career Opportunities
    • Comp & Benefits
    • Senior Management
    Current Employee - Mid-Level Manager in Los Angeles, CA
    Current Employee - Mid-Level Manager in Los Angeles, CA
    Positive Outlook
    Approves of CEO

    I have been working at Tesoro Corporation full-time (More than 3 years)


    Great company with good pay, good benefits, open door from management, empowerment of employees to succeed and implement business improvement initiatives which translates in competitive advantage over other refiners. The culture is one of progress, adapting, and inclusiveness. Maybe a bit too much of the "legacies" cultures from previous owners (Arco, Shell, BP, and even old Tesoro), but that's changing and with the company name change, we will probably start working towards developing our own identity. A company that materializes on market opportunities for M&A by having a solid cash flow, when other companies are hurting from not having the financial discipline. It's a very good company to work for. Very exited about what's coming next... foundations are robust to take the company to the next level.


    Old cultures need to go away... people need to embrace who we are!

    Advice to Management

    Keep driving the change... some people may not like it, but it's the right thing to do. No company has ever made it to the next level by sticking to the old methods or stop growing...

See All 184 Reviews

Tesoro Corporation Photos

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



Getting an Interview

Getting an Interview





    Intern Interview

    Anonymous Interview Candidate
    No Offer
    Negative Experience
    Average Interview


    I applied through college or university. I interviewed at Tesoro Corporation.


    I submitted my resume online and was contacted by HR a couple weeks later to set up an interview time. The woman I spoke to on the phone was very nice and efficient in setting up the interview. Unfortunately this is where my positive experience ended. The man who interviewed me seemed completely disinterested throughout the interview. The questions were relatively simple behavioral questions, but he would interrupt my answers to interject his own opinion. One of these interjections was a rant about how he's overworked and his boss doesn't understand work/life balance. Not exactly what you want to hear about the department you'll be working in. I asked if interns are given any training and he told me they're pretty much thrown into the position and it's sink or swim - another red flag. After the interview I was told I'd hear something in "four to six weeks," so I'm guessing they had no idea when they'd be contacting candidates. After four weeks passed I emailed the woman from HR who originally contacted me and never heard back from her. They completely ghosted me, not even a generic rejection email was sent. After this experience I lost all interest in working here, but some sort of follow through would have been nice. I expected better from a company like Tesoro. By far the most unprofessional interview I have ever had.

    Interview Questions

    • How have you significantly changed an organization?   Answer Question
    • What's a safety hazard you have encountered and what did you do to fix it?   Answer Question
See All 81 Interviews

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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