Based on the Eastern Shore of Maryland, Dieter’s Close Quarters Defense® (CQD®), has provided the highest quality tactical training services and support products to the nation’s most elite operators for over twenty five years. It has upheld many longstanding associations with top military, law enforcement, and government agencies. CQD® has developed a reputation in the industry as a company that puts integrity of character and quality of training and services at the forefront of its business.

The company's overriding purpose and mission statement is to defend those who are preyed upon by the criminal or terrorist elements, and to train the professionals who are authorized to protect those citizens. With this idea in mind, CQD has established numerous community outreach programs including protective and security training for vetted citizens: men, women, and children.

CQD’s training, products, and services are unsurpassed in the industry. The system is used professionally throughout the world by our nation’s elite teams and is continually validated by law enforcement under intense pressure. Customized courses are provided for special operations, military, and police units, federal protective operations units, and counter-terrorist/hostage rescue units.