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Who We Are

For more than 100 years Shields, Harper & Co. (SHC) has operated as a trusted distributor of petroleum equipment products for retail and commercial fueling applications. Established in 1917 the company got its start by selling fuel hoses to Standard Oil Company of California, now commonly known as Chevron. 

Home Office Management


Bart Scowley | Chief Executive Officer

Located in the Martinez office, Mr. Scowley has more than 30 years of industry experience. His background includes membership on the Governor's Advisory Committee on Reformulated Fuels. He is the acting representative of the Petroleum Equipment Institute (PEI) to the California Air Resources Board (CARB). He also has experience as the Instructor for the California underground storage tank (UST) regulations for the University of California. Mr. Scowley has been a member of many manufacturer advisory councils including Wayne, OPW and Veeder-Root. He is Chairman of the Board of Directors of Shields, Harper & Co.


Dave Sarginson | President

Dave is located in the Martinez office and has also been with the Company for more than 30 years. He is the sixth President in the one hundred year plus history of the company. Suppliers know Dave as their principal contact. Dave is currently a member of the Distributor Advisory Council for both Wayne and Veeder-Root and is a member of the Shields, Harper Board of Directors.


Greg Brown | Chief Financial Officer

With over 20 years of finance experience, Greg administers the accounting, information technology and inventory management departments. He is a licensed CPA and former KPMG auditor. Greg has worked at both public and private companies in the financial services, distribution, and construction industries. He is a graduate of the University of Notre Dame and has an MBA from California State University.  

Niazi Alzouhbi | Senior Vice President

Niazi “Z” Alzouhbi is located in the Martinez Headquarters. He provides enterprise leadership, with a focus on Shields, Harper & Co.’s business development and operations groups. Niazi’s background includes more than 20 years of running successful businesses in both distribution and manufacturing.


Doug DeLong | General Manager

Doug also has more than 30 years of industry experience in both sales and operations management. As General Manager of Shields, Harper he directs the purchasing and sales departments and oversees ERP operations and procedures. 




Dave Sarginson | Dave manages the 15 customer relations equipment specialists in the eight branch warehouses. Each manager is supported with an inside sales staff at every branch location to provide walk-in order service and will-call pick-up and delivery. Each manager reports either directly to Dave Sarginson or the region vice president. Dave directs the sales department budgets, account assignments and customer and supplier relationships.


Sales Administration

Doug DeLong | Sales administration operates under the management of Doug DeLong who supervises inside sales, purchasing, order fulfillment and inventory control. In the home office Doug’s group includes Jennifer Nguyen, purchasing manager and John Frazier, parts manager, who are responsible for all parts and equipment order fulfillment.


Information Technology

Paul Chae | Members of the IT department report directly to Paul Chae who is responsible for network administration, ERP process and procedures, and software upgrade implementation. Paul's staff includes James McCoy, IT Manager, and Paul Gardner, ERP Analyst. His responsibilities include long-term planning, disaster recovery, systems continuity, data analysis and ERP training throughout the company.


Marketing Programs

Colin Szehner | Marketing initiatives for Shields, Harper & Co. are managed by Colin Szehner whose programs help customers stay informed about products, services and industry regulations. These programs provide a variety of resources for the industry which include a blog, manufacturer how-to videos which can be found on the SHC YouTube Account and updates on both state and federal government fuel systems compliance.


Technical Support

Jeff Nelson | Customer technical support is managed by Jeff Nelson who is the electronic fuel systems and products expert for SHC. His main office is in the Martinez branch, however he can be found all over the west helping identify and consult for fuel system service companies. Jeff also conducts training sessions for technician certifications for many manufacturers including Veeder-Root, Verifone and Wayne. Check out the Training Page for more information on the next training session.


Warehouse Operations

Guy Cardinale | Guy oversees each of the company’s eight warehouse locations and product inventory housed in each branch. Guy is stationed at the Martinez Headquarters from where he administers daily cycle counts and manages company-wide warehouse operations in order to keep the inventory accurate and available for customer needs.



Eric Liming | Operating from the Martinez office, the credit department is managed by Eric Liming who is responsible for assessing and assigning credit, maintaining customer account status, issuing invoices and processing payments. Eric oversees credit administrator, Maryann Maes who work together with customers on account payments and upkeep - click here for a Credit Application.


Human Resources/Accounting

Jonalee Adriano | Jonalee controls the human resources/accounting department which she manages out of the Martinez location. Her responsibilities include implementing employee benefits, managing company payroll, accounts receivable and accounts payable.