We Fuel


How We Work

At Diversified, we are committed to our customers, delivering an excellent experience day in and day out, all with the purpose of earning your trust and developing long-standing relationships and partnerships. Our 4 values were created with our customers and the highest ethical standards in mind. Our values aren’t just something framed on a wall or on a page of a website. We aim to embody these ideas every day.



We are committed to the success of our customers, owners and employees in everything we do. Our commitment is to service, sound business practices, perseverance, and character development of our employees.

Contribution and Customer Satisfaction

Contribution and Customer Satisfaction

Our number one goal for our customers is to create measurable value for their business. We strive to do so by sharing best practices and passing along cost savings created through buying power and technology-based efficiencies.



We are dedicated to performance excellence throughout our business. We focus on excellence in quality, timely deliveries, industry expertise, teamwork, diversity, and continuous improvement.

Earning Your Trust

Earning Your Trust

Each day we work to earn our customers' and partners' trust by honesty, respect, fairness, and integrity as drivers of our behavior and corporate culture. We keep our promises and ethical behavior is our standard.

Meet The Team

Products don’t make up a company -- people do. Our team is at the heart of everything we do.

Fernando de Agüero

Chief Operating Officer

Randy Grizzle

Director of Business Development

Cheryl Coker

Customer Experience Manager

Tom DeFeo

Sales Executive

Ron Haroon

Fuel Management Technology Manager

Claudia Huix

Freight Analyst

Robert Fiscus


Lori Adkison

Operations Analyst

Cristian Huix

Logistics Analyst

Laura Hutchins

Operations Analyst

Camie Ward

Accounting Manager

Mike Dayton

Commercial Technology Manager

Victor Escobar

Software Developer

William Brumbelow

Director Software Technology

Dan Stickel

Director Information Technology

Leonardo Carmona

Software Developer

Raul Garcia Salguero

Software Developer

Ben de Agüero

Administrative Analyst

Jonathan Farias

Operations Analyst

Janet Trella

Commercial Analyst


This picture is a tribute to our CEO’s original family business in Alabama as a Pure Oil distributor. Sherell Oil was renamed Sheffield Oil Company by Allison Sheffield de Aguero’s grandfather. 

While our company began serving customers as a wholesale natural gas supplier, we quickly launched into a wholesale power operation. In 2011, we created Diversified Fuel Supply, a petroleum fuel subsidiary, and sold an equity stake to a strategic oil sector investor. The equity in the subsidiary was repurchased in 2014, and subsequently merged Diversified Fuel Supply into its parent company, DES Wholesale, LLC dba Diversified Energy Supply.

Today our organization is operated as a consolidated energy supply solution for our customers. We grew at a triple-digit pace annually for the first 7 years. In 2019 we were recognized as the 2nd fastest growing middle market company in Georgia by the Association for Corporate Growth (ACG) as a Fast 40 company. We enjoy strong supply relationships with the largest national energy companies and bring the leading edge technology solutions to the fuel marketing and distribution sector.


Diversified Energy Supply holds various certifications including: