Roncelli Plastics
Plastics ManufacturingCalifornia, United States51-200 Employees
Roncelli Plastics is a contract manufacturer that produces engineered plastics parts and components, founded in 1969 and headquartered in Monrovia, California. It serves critical applications across aerospace, biomedical, life science and space, semiconductor, defense, and oil and gas sectors. The company supports clients from prototype design through full production with capabilities in rapid prototyping, CNC machining, injection molding, 3D printing, and clean room assembly. It maintains certifications including ISO9001, AS9100D, ISO13485, ISO27001, and ITAR. Based in California, the company operates additional offices in San Jose, Dallas, Tampa, Chandler, and Cincinnati to serve a broad client base. In January 2022, Roncelli added two Keyence machines, signaling continued investment in advanced manufacturing capabilities.