Join Our Team!

Located in Monrovia CA, Roncelli Plastics was founded in 1969. We specialize in plastic and non-metallic machining and fabrication, and are one of the leading non-metallics fabricators in the United States. Our highly experienced staff of machinists, quality personnel, and supervisors are dedicated to delivering the best quality plastic and non-metallic components in the industry. Finished components are delivered to some the largest and most well-known companies in the world including Boeing, Raytheon, Honeywell, Northrop Grumman, Lockheed Martin, NASA, and hundreds of other companies.

We offer a competitive salary, a clean work environment, two shifts, an excellent benefits package including paid time off, medical/dental/vision/life insurance, as well as an employer matched 401k plan. Great opportunity to work in a family owned/oriented business.

Roncelli Plastics Inc. is always looking for talented new people to join our team. If you have any questions, or need assistance to apply to a posted position, you can email or call 626.359.2551.

“Roncelli Plastics is an equal opportunity employer and makes employment decisions and provides employment opportunities on the basis of merit, qualifications, potential and competency. We want to have the best available persons in every job. Company policy prohibits unlawful discrimination based on race, religion, (all aspects of religious belief, observances, and practices including religious dress and grooming practices), color, national origin, ancestry, sex, (including pregnancy, childbirth, breastfeeding or related medical conditions) gender, gender identity, gender expression, sexual orientation, marital status, age, physical or mental disability, genetic information, or medical condition, except where physical fitness is a valid occupational qualification or any other consideration made unlawful by federal, state or local laws. This commitment applies to all persons involved in the operations of the Company and prohibits unlawful discrimination by any employee of the Company, including supervisors and co-workers. All such discrimination is unlawful.”