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Roncelli Plastics

Headquarters located in Monrovia, CA Roncelli Plastics specializes in plastic and non-metallic machining and fabrication, we are one of the leading non-metallic fabricators in the United States. Since the doors opened in 1969, Roncelli Plastics' mission has been committed to deliver critical plastic parts for the most demanding applications. We are determined to provide exceptional customer service alongside precision production of plastic components in critical industries. 

Committed to investing in the most efficient manufacturing technologies and outstanding people, Roncelli Plastics empowers an atmosphere of accountability, reliability, and dependability, where open communication and teamwork translates to customer success. 

Roncelli Plastics seeks to attract, retain, and reward the very brightest minds in the industry by providing a safe, friendly, and supportive work environment where management not only recognizes employees who exceed expectations but rewards them for their commitment to the excellence.