About Us

Dion Defense will handle all of your defense parts needs.dion defense

We are now part of the Navistar network.

DefenseIn 2003, Navistar, Inc. started Navistar Defense, LLC, to answer the U.S. government’s request for armored and unarmored military vehicles. Navistar Defense transformed from an idea into a company with annual sales of more than $2 billion.

Navistar utilizes nine different manufacturing plants and has the capacity to produce more than 100,000 trucks and 500,000 engines each year. Navistar’s vast array of proven vehicle systems and technologies are made available to Dion Defense in support of military customers. Navistar leverages its commercial truck engineering and manufacturing expertise and global supply network to provide cost-effective solutions to the armed services. These capabilities allow us to swiftly adapt vehicles to meet the growing threats and challenges faced by the troops.

Navistar has gained tremendous momentum as a leader in producing and servicing top-quality military vehicles. To date, the company has won contracts to build more than 20,000 military vehicles for the United States military and our allies.

Headquarters are located in Warrenville, Illinois. Production sites for military vehicles include Garland, Texas; Tulsa, Oklahoma; and West Point, Mississippi. MaxxForce® Diesel engines are produced at the company’s engine assembly plants in Melrose Park, Illinois, and Huntsville, Alabama.

You need spares experts because:

You require rapid response on parts inquiries and quotes

We deliver the parts service you need beyond your expectations with help available by phone, email and web. Our product team responds with detailed information on parts identification, availability, and pricing.

When you need help identifying the replacement part you need, regardless of what type of vehicle it comes from, get the information from our dedicated team, ready with a database of more than 700,000 SKUs and their cross references, access to the latest Bill of Material (BOM) and truck body parts illustrations, and a network of service engineers supported by a global network of supply.

You demand meticulous spares contract execution

Your contracts are executed on time and with precision in exact quantities of requisitioned part numbers in required packaging.

The Dion Defense parts team operates under continually improving processes and quality control systems to deliver to contract specifications.

Our mission is to exceed your expectations. Delivering the right parts at the right time at the right price.

A global spares distribution network and a state-of-the-art Defense Distribution Center, combined with an extensive supply chain built from more than 100 years of experience in servicing vehicles, give you the confidence to know you can get parts you need.

Dion Defense, an American family-owned company, is part of the network that has built vehicles to support our troops since WWI and that is actively engaged in the National Defense Industrial Association (NDIA). We proudly participate in the Employer Support of the Guard and Reserve (ESGR) program, www.esgr.org.


Contact Information:

Defense Group Manager

Justin Agan

(619) 377-0146

Contact Us