About Us

Diamond Z’s Management Team

Clients turn to Diamond Z Engineering time and again for proven results – successes that are a direct reflection of our team’s industry-leading experience, knowledge and market insight. Contact Diamond Z Engineering and you get the best minds in the business, shaped by a strong work ethic and led by a visionary group of managers.

W. DARRIN HAGLER
A professional engineer with more than 25 years in the business, Darrin began his career with BP Oil. He narrowed his focus, gaining extensive construction experience that has led to his expert consultation on and management of large scale projects including retail sites and above ground terminal facilities.
Darrin.Hagler@DiamondZEngineering.com

DANN R. STAPP
Dann also worked for BP Oil, with a major focus in the retail gasoline facilities division. Working as a professional engineer in multiple states, Dann has gained invaluable experience and now offers particular expertise in construction, image and re-image, and environmental management.
Dann.Stapp@DiamondZEngineering.com

JASON R. STAPP
Jason began his career at Lincoln Electric which served as the foundation for his role in service station design and engineering. Jason’s design understanding has now been complemented with field construction and maintenance experience with both gasoline and diesel facilities.
Jason.Stapp@DiamondZEngineering.com

J. ROBERT TEEPEN
A business graduate of Bowling Green University, Bob has been in the convenience store and petroleum industry for over 25 years, primarily with 7-11 and Dairy Mart. More recently, Bob managed the Construction Services Innovations division of Tanknology specializing in critical path inspections.
Bob.Teepen@DiamondZEngineering.com

GAYLE L. ZOLDAK
Gayle assists in providing design & engineering services for the development and construction of retail gasoline service stations, truck refueling facilities, and repairs on distribution facilities. She has a wide range of experience in design graphics including architectural, civil, mechanical, and detail design drawings. Gayle is responsible for the complete development of professional engineering permit and construction drawing sets. Additional responsibilities include client interface; maintaining office systems; organizing office operations and procedures; supervising, orienting, and training staff; inventory control.
Gayle.Zoldak@DiamondZEngineering.com