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3120 Enterprise St.
Brea, California 92821
United States

Proponent is the new identity representing not only the expertise of Kapco Global and Avio-Diepen as one united company, but also the unique capabilities and perspective the organization brings to the aerospace market. Proponent isn’t just a name, it’s our mission statement.  With 115 years of collective experience supporting the MRO, OEM and airline markets, we have a history of offering innovative inventory and supply chain management solutions to both OEM and aftermarket customers. Proponent provides the scale and agility you need, the innovative solutions you want and the personal touch you deserve. We are employee-owned and every team member has a vested stake in your success—that’s the Proponent difference. 

A Proponent for Your Aerospace Distribution Needs

A Proponent for Your Aerospace Distribution Needs