Mastercam CNC Programmer

If interested and you meet the qualifications, apply here directly to reach Mike Dominguez

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CNC Programmer (Mastercam | 3-5 Axis Mills & Lathes)

Location: Monrovia, Ca

Pay: $45-$65/hr depending on experience

Schedule: 1st Shift - 5am - 3:30pm, 4 - 10 schedule, Mon - Thursday, heavy on Overtime. Mandatory OT on Fridays, saturdays are optional.

Job Overview

We are seeking an experienced CNC Programmer with strong Mastercam programming experience and hands-on knowledge of 3, 4, and 5-axis CNC mills and CNC lathes . This role will be responsible for creating, modifying, and optimizing CNC programs while supporting production, setup, troubleshooting, and continuous process improvements.

The ideal candidate will have strong machining experience, be capable of programming from blueprints, and possess the ability to support machining operations from setup through final inspection.

Responsibilities

• Create and modify CNC programs using Mastercam for multi-axis machining operations.

• Program and support 3-axis, 4-axis, and 5-axis CNC mills as well as CNC lathes.

• Develop machining strategies to improve cycle times, tooling performance, and overall efficiency.

• Perform machine setups, tool changes, offsets, and adjustments as needed.

• Read and interpret blueprints, engineering drawings, GD&T, and process specifications.

• Troubleshoot machining issues and make program modifications to ensure quality and productivity goals are met.

• Verify first article and in-process inspections using precision measuring instruments.

• Collaborate with machinists, quality personnel, and engineering teams to support production requirements.

• Assist with fixture design, tooling selection, and process development.

• Perform deburring, grinding, tapping, cutting stock, and other secondary machining operations as required.

• Maintain a clean, organized, and safe work environment.

Qualifications

• 5+ years of CNC programming experience in a manufacturing or machine shop environment.

• Proficiency with Mastercam programming software .

• Experience programming and supporting 3-axis, 4-axis, and 5-axis CNC mills .

• Experience programming and supporting CNC lathes .

• Strong knowledge of machining principles, tooling, feeds, speeds, and work holding methods.

• Ability to perform machine setups, tool offsets, and process adjustments.

• Experience with precision measuring equipment including micrometers, calipers, height gauges, and bore gauges.

• Ability to inspect parts to blueprint specifications and maintain tight tolerances.

• Strong blueprint reading and GD&T knowledge.

• Excellent math skills and problem-solving abilities.

• Reliable, self-motivated, and detail-oriented.

Preferred Qualifications

• Aerospace, medical device, defense, or high-precision manufacturing experience.

• Experience with fixture design and process optimization.

• Technical school, apprenticeship program, or equivalent machining education.

• Experience machining complex components with tight tolerances.

Keywords

CNC Programmer, Mastercam, 5 Axis, 4 Axis, 3 Axis, CNC Mill, CNC Lathe, Multi-Axis Machining, G-Code, Setup, Tooling, GD&T, Blueprint Reading, Manufacturing, Aerospace Machining, Precision Machining

Job Type & Location

This is a Permanent position based out of Monrovia, CA.

Pay and Benefits

The pay range for this position is $45.00 - $65.00/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:

• Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a fully onsite position in Monrovia,CA.

Application Deadline

This position is anticipated to close on Oct 7, 2026.

About Aerotek

Aerotek® Inc. provides staffing and services solutions in manufacturing, logistics, construction, aviation, facilities and maintenance. We provide the expertise, solutions and people required to rise to the challenges of North American industry. Headquartered in Hanover, Md., Aerotek operates a unified network of over 200 offices across North America, supporting more than 18,000 clients each year. Aerotek is an Allegis Group company, the global leader in workforce and business solutions. To learn more, visit: Aerotek.com | 1-888-AEROTEK.

Aerotek offers weekly pay, employee benefits including medical, dental & vision, life insurance, health advocacy and employee assistance programs, a 401(k) plan, and employee discounts.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance:

Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector:

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI):

We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.