In Our Fleet, You're Family.

Join our team of driven & Dynamic employees

At Cox Petroleum Transport, we all work together to elevate the bar and provide an excellent environment for our employees, customers, and the community. As a leading transporter of petroleum-based products, with standards that far exceed both government and customer obligations, our main goal is to provide safe, timely, and quality customer service every day, one load at a time.

We understand that every employee contributes to the success of our business. As a family-owned company, we value and appreciate the hard work and dedication that our employees and their families deliver to ensure the safe operations of our business. We are grateful you would like to join our family and hope to have many productive years working together.

Team Testimonials

deborah in office

At Cox Petroleum, the only thing you need to have to be successful here is drive, hard work, and dedication. I set out to learn everything I could to be valuable to a company that changed the direction of my future in a positive way. Over the years, I have been able to learn and grow at my own pace. I was promoted to manage our Dispatch Department, where I have now been for the past 13 years. I’m grateful for the chance to be a part of a place that really does care about your growth and well-being.

Deborah S.

billy smith

I have been an OTR driver for Cox Petroleum for the past 26 years. My favorite route is up to the northwest, or across the south into Texas and Louisiana. I like Cox because of the family atmosphere. Everybody’s friendly and we’re like a big family. You’re not just a number here, you have a name. I also like the way Cox is run, the equipment is good, and they take care of it. You have everything you need, but if you need something, you just ask and you get it taken care of. It’s why I’ve stuck around so long. I plan on retiring here which isn’t that far off.

Billy S.

cynthia in office

I have been with Cox Petroleum for 23 years as an Inventory Specialist. I love that Cox trusts my work and knows that I will always do my job to the best of my ability. I have learned so much and I appreciate the opportunity that I’ve been given. I plan on working here as long as I can.

Cynthia H.


Wendy Renteria

Director of Finance

Born and raised mostly in Michigan, Wendy has worked for Cox Petroleum Transport since April 2008. She began as a controller for the company and was promoted in April 2022 as our new Director of Finance. Wendy is enjoying learning the new aspects of her role and sharing her extensive financial expertise with others.

Before joining Cox Petroleum, Wendy gained many years of valuable experience as a senior staff accountant and insurance underwriter. She’s worked in various industries, ranging from insurance, agriculture, and construction, which has prepared her to work with many different types of clients.

Wendy is looking forward to participating in local and state organizations as part of her new role. In her free time, she enjoys spending time with her family and baking with her two grandchildren.


Tom Davis

Vice President of Safety

Tom specializes in everything related to safety and compliance for Cox Petroleum Transport. He’s our in-house expert for environmental and DOT regulatory requirements, and enjoys sharing his knowledge and experience with new personnel. He strives to facilitate a strong safety culture through leadership and employee engagement.

Since Tom joined Cox Petroleum Transport as a driver in 1998, he also worked as dispatch and a terminal manager, before leading the way in our safety department in 2012. As Vice President of Safety, he continually assesses safety risks and works to mitigate them, through hiring the best driver candidates and providing comprehensive safety training. Tom has in-depth knowledge of OSHAANSINFPAEPAHAZMAT Regulation, Workers Compensation, and Hours of Service.

Born and raised in Bakersfield, Tom is committed to his community and industry. He is a board member of the Kern Transportation Foundation, as well as a Highway Policy Committee member for the California Trucking Association. He is also on the safety committee for National Tank Truck Carriers, an organization dedicated to safety education in the industry. He also participates in many activities sponsored by the California Highway Patrol.

When Tom isn’t working, he enjoys spending time with his wife, four grown children, and nine grandchildren, barbecuing and watching football.

dave green

David Green

Vice President of Information Technology

David is our in-house expert on all things related to technology here at Cox Petroleum Transport. From servers and cloud-based technology to computers, he manages the technical side of the business as a member of our Executive Leadership Team. With over 25 years in the transportation industry, David brings longevity and experience to his role as our Vice President of Information Technology.

David joined Cox 16 years, ago after working with Hughes Aircraft for several years. Hughes was the largest defense employer at the time, giving David an opportunity to learn databases and large equipment on the job. He is completely self-taught. When he worked for Hughes, he lived 4-5 hours away and would spend the time in the vanpool reading technical books to learn the industry. When he went to work for Danny Mairs, he brought that knowledge to the table to develop the technical aspects of the business.

David and his wife recently bought an RV and are looking forward to travelling in the near future. They have three grown children and live in Tehachapi, where he enjoys the small town atmosphere and spending time with local friends and family.


Lloyd Ponder

Chief Operating Officer

A Bakersfield native, Lloyd joined Cox Petroleum 20 years ago as a dispatcher. Over the years, he has also worked as a dispatch manager, terminal manager, and regional manager, handling operations for multiple sites.  As the company restructured, these experiences prepared him well for his role as the Vice President of Operations. Today with his recent promotion, he oversees multiple departments, including the support of the Operations, Safety, and Maintenance.

Lloyd enjoys the daily interaction with management and other employees, helping them solve problems and motivating them along the way. As Chief Operating Officer, he is engaging more with the safety and maintenance departments as well as the financial side of the company and looks forward to progressing in this area.

During his free time, Lloyd enjoys camping and spending quality time with his family. As a member of the California Trucking Association Environmental committee, he is able to stay on the forefront of new regulations and other changes in the trucking industry. Additionally, he is the Treasurer of the Kern Unit with the CTA.


Larry O’Connell

Executive Vice President

Larry joined Cox Petroleum Transport in 2013 as the Vice President of Operations. Over the years, he has taken on many responsibilities, including the operations of dispatch, terminals and drivers, safety, maintenance, and the HR departments. As the company has changed in structure and leadership, Larry was promoted to the role of Chief Operating Officer in 2014, which included the oversite and support of these departments. Most recently, Larry was promoted to Executive VP, and his primary role is to focus on the continued growth opportunities in our industry.

Understanding that people are vital to the company’s success, Larry works closely with team members to learn what motivates them and uses his experience and knowledge to help others thrive in their roles. As a senior executive member of the leadership team, Larry enjoys mentoring and coaching the company’s safety and operations leaders in a way that enhances Cox Petroleum’s family-oriented and safety-first culture.

Before joining Cox Petroleum Transport, Larry spent more than 20 years in the transportation industry in various roles, including driving, dispatch, maintenance, management and project planning. Additionally, Larry has been in sales, Information Technology, leadership at a Truck Dealership, and in publishing roles. In these roles, Larry learned the value of hard work and discipline, as well as the importance of building relationships.

Larry currently Chair’s the Safety, Security and Human Resources Policy Committee and is a Vice President on the Officer’s Council for the California Trucking Association (CTA). He is also a member of the National Tank Truck Association, and he attends the board meetings for the company in support of up-to-date operational activity. Over the years, he has attended Leadership, Sales and Management Programs. Larry is also dedicated to giving back to the community through sponsorship and donation, largely through the CTACHP, and local Fire Departments. He is also on a Committee with the DOT and CalSTA, titled the Commercial Vehicle Road User Charge Working Group, with other CTA members, to help educate and support staff about the ins and outs of the transportation industry in CA.

Larry lives in Huntington Beach, with his wife of 27 years, and they have two grown children. When the weather is nice, they enjoy a variety of social and sports activities in town, while he and his wife continue to maintain many long-standing relationships with the members of the community and their friends.

image of Jeremy

Jeremy Mairs


As the current President and CEO of Cox Petroleum Transport, Jeremy Mairs takes pride in watching the business succeed under the efforts of every employee, from the Executive Leadership Team to the drivers out on the roads. Jeremy believes that the people are the most valuable asset of Cox Petroleum and ensures that everyone is treated as family. He enjoys passing down his knowledge of the industry to lead those who have been with the business for a long time, as well as new Cox employees.

Jeremy began working for the business in 1995, after his father purchased the company from Mary Cox. He gained as much experience as possible over the years, in many different roles, including mechanic, dispatcher, driver, terminal manager, fleet manager VP, and EVP. These experiences gave him the skills and knowledge he needed to lead effectively as the President and CEO—and now 100% owner—of Cox Petroleum Transport.

Committed to his industry, Jeremy makes a point to stay engaged in state and local organizations. He is the President/Unit Chair of the Kern unit of the California Trucking Association (CTA), as well as the Vice President on the Officer’s Council for the CTA. He is also on the Kingpin Committee for the CTA and the committee for the California Highway Patrol Safety Council. He is a board member of the CTA, the Kern Transportation Foundation, and the National Tank Truck Carriers (NTTC). For the NTTC, he is also on the Executive Committee and the Advocacy Committee, and he chairs the Energy Services Committee. These memberships help Jeremy stay abreast of recent changes in the industry and share up-to-date information with the Cox Petroleum family.

Jeremy spends his free time with his wife and three children, Mack (12), Hank (10), and Libby (6). He enjoys fishing, hunting, camping, and shooting sporting clays, as well as venturing out on his boat whenever the weather cooperates.