CNC Machinist
Standard
Roncelli Plastics

Monrovia, CA


Category

Manufacturing

Job Type

Full_Time

Salary

24USD - 30USD per hour

Posted Date

June 19, 2025


Job Description

Job Description

Job Description

Roncelli Plastics, an industry pioneer since 1969, as a thermoplastics and composites manufacturer headquartered in Monrovia, California. We fabricate critical parts for Commercial Space and Aerospace, Medical and Life Science, Semiconductor and Oil and Gas. Trusted by the world’s most notable brands for our leading edge technology, innovative operations, technical expertise and knowledgeable partnership.

www.roncelli.com

Position Summary: Operates the Computer Numerical Control (CNC) mill machines to fabricate plastic and non-metallic parts according to strict customer and quality specifications.

This position will utilize confidential information, Confidentiality Agreement is strictly enforced.

Essential Functions:

· Perform CNC mill set-ups and operate CNC mill machines according to process sheets with no supervision or assistance.

· Create, edit, send, or retrieve CNC programs from systems files as required for mill machine set-up and operation.

· Read and interpret manufacturing paperwork (travelers, blueprints, sketches, etc.) in order to produce products as required by customer specifications and quality standards.

· Inspect and verify own work prior to submitting to Quality Assurance Department for first article inspection.

· If part is non-conforming, use non-conforming material procedure.

· Meet needed quote times and schedule for assigned work.

· Correctly process required work-related paperwork and Material Requirements Planning (MRP) documents.

· Communicate regularly with supervisors and other employees regarding any production issues and ways to eliminate possible errors on set-up and/or programming.

· Perform non-CNC tasks when necessary, such as hand-work operations.

· Evaluate and update “estimated to actual” cycle times.

· Make process decisions and utilize the help chain/chain of command when necessary.

· Challenge processes if needed to create a more efficient production environment.

· Focus on set-up and run time reduction.

· Conduct all shop functions in a safe manner.

· Consistently improve the organization and cleanliness of assigned areas (5’s).

· Perform other duties as required.

Skills, Knowledge, and Experience:

· Minimum of 2 - 5 years of relevant CNC mill machine experience is required. Certificate from NTMA or other technical school is a plus.

· Firm understanding of CNC mill programs including formatting and editing programs. CAD/CAM experience is strongly preferred.

· Ability to use various inspection tools such as micrometers, calipers, height gages, and comparators.

· Familiarity with Coordinate Measurement Machines (CMM) is desired.

· Ability to read and understand blueprints and technical documents.

· Strong shop math skills including the ability to perform measurement conversion.

· A genuine belief in continuous improvement and a disciplined process.

· Organization and time-management skills.

· Self-starter with the ability to multi-task and prioritize daily work assignments.

· Excellent verbal and written communication skills.

· Basic computer knowledge and ability to use various types of manufacturing software programs such as JobBoss.

Company Description
Roncelli Plastics, an industry pioneer since 1969, as a thermoplastics and composites manufacturer headquartered in Monrovia, California. We fabricate critical parts for Commercial Space and Aerospace, Medical and Life Science, Semiconductor and Oil and Gas. Trusted by the world’s most notable brands for our leading edge technology, innovative operations, technical expertise and knowledgeable partnership.

Company Description

Roncelli Plastics, an industry pioneer since 1969, as a thermoplastics and composites manufacturer headquartered in Monrovia, California. We fabricate critical parts for Commercial Space and Aerospace, Medical and Life Science, Semiconductor and Oil and Gas. Trusted by the world’s most notable brands for our leading edge technology, innovative operations, technical expertise and knowledgeable partnership.
Ad Information

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Standard

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July 17, 2025 23:48

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July 20, 2025 08:44