Mastercam Programming Jobs in Rancho Cucamonga, CA

At a glance

Company: AMMR Inc.
Location: Pomona, California
Pay: $30–$40 per hour, based on experience
Job type: Full-time, on-site
Experience: 5+ years
Machines: CNC vertical turret lathes (VTLs)
Controls: Fanuc
CAM software: Mastercam

Why join AMMR?

AMMR Inc. is an AS9100D-certified, ITAR-registered precision machine shop specializing in complex machining for aerospace, defense, power generation, private space, satellite and other demanding industries.

This is a senior-level opportunity for a VTL machinist who can take ownership of large-diameter CNC turning work from setup through final inspection. You will not simply load parts and push buttons. AMMR needs someone who can read the print, develop a reliable setup, indicate large workpieces, prove out the program and produce a first article that meets requirements.

The work includes large, complex components manufactured from challenging materials such as titanium, Inconel, Waspaloy and Hastelloy. You will work with Fanuc-controlled VTLs, Mastercam-posted programs and a team that understands the skill required to hold close tolerances on large-swing work.

If you specialize in vertical turning and know how to make a difficult setup run correctly, this is an opportunity to put that experience to work on serious precision-machining projects.

⚙️ What you’ll be doing

• Set up and operate Fanuc-controlled CNC vertical turret lathes
• Machine large-diameter components from initial setup through final part
• Work directly from engineering drawings and models
• Interpret GD&T, datum structures, profile tolerances and position callouts
• Build and modify setups using chuck jaws, soft jaws, shim seats and custom fixturing
• Indicate and securely locate large workpieces
• Edit and prove out CNC programs at the machine control
• Work with programmers on Mastercam-posted code
• Select tooling and adjust speeds, feeds and offsets as needed
• Hold tolerances into the tenths on large-swing components
• Perform first-article and in-process inspections
• Troubleshoot machining, tooling, workholding and dimensional issues
• Complete inspection and traceability documentation to AS9100 standards

️ Machines, controls & software

Machines: Large-format CNC vertical turret lathes and single-turret vertical lathes
Controls: Fanuc
CAM software: Mastercam-posted programs
Inspection equipment: Micrometers, bore gages, height gages and indicators
Processes: Large-diameter CNC turning, custom workholding, program prove-out and precision inspection

⭐ Shop highlights

• AS9100D-certified quality system
• ITAR-registered manufacturing operation
• Large-format CNC turning capabilities
• Parts ranging up to 100 inches in outside diameter
• Aerospace and defense machining
• Private-space and satellite work
• Power-generation components
• Prototype through production manufacturing
• Challenging close-tolerance components
• Established precision machine shop operating since 2007

Materials you’ll work with

• Titanium
• Inconel
• Waspaloy
• Hastelloy
• Stainless steel
• Aluminum

✅ What we’re looking for

Required:

• At least five years of CNC machining experience
• Strong hands-on experience setting up and operating CNC VTLs
• Ability to independently take a large-diameter part from setup through final inspection
• Experience with Fanuc CNC controls
• Ability to read engineering drawings and understand GD&T
• Experience indicating and aligning large workpieces
• Strong knowledge of tooling, offsets, workholding and machining fundamentals
• Ability to edit and prove out programs at the control
• Experience using precision measuring and inspection equipment
• Ability to hold close tolerances on large-swing work
• Working proficiency in English
• Ability to maintain accurate inspection and production documentation

Preferred:

• Experience machining titanium, Inconel, Waspaloy or Hastelloy
• Experience working with Mastercam-generated programs
• Aerospace, defense or other AS9100 manufacturing experience
• Experience developing or modifying custom fixtures, chuck jaws and soft jaws
• Strong first-article inspection and troubleshooting skills

Why you’ll like working here

• You will own challenging VTL work from setup through final part
• The work requires genuine machining skill and problem-solving
• You will machine large, complex components—not repetitive operator-only work
• You will work with experienced programmers and manufacturing professionals
• Your setup, workholding and process knowledge will directly affect results
• The company serves stable, demanding industries
• You will have the opportunity to work with difficult materials and close tolerances
• Skilled machinists are trusted to inspect and verify their own work

Pay & employment details

Pay: $30–$40 per hour, based on experience and demonstrated skill
Employment: Full-time, on-site
Location: Pomona, California

This position involves ITAR-controlled work. Candidates must be eligible to work with ITAR-controlled technical data and products.

About AMMR Inc.

American Metal Manufacturing Resource Inc. is an AS9100D-certified and ITAR-registered precision machine shop located in Pomona, California. Established in 2007, AMMR operates from a 15,000-square-foot manufacturing facility and provides complex rough and finish machining for demanding applications.

The company supports commercial and military aerospace, power generation, private space, satellite, medical, industrial, oil and transportation customers. Its CNC turning capabilities include conventional lathes and large-format vertical turret lathes capable of machining parts from approximately 4 to 100 inches in outside diameter.

AMMR works with challenging aerospace alloys and materials, including Inconel 625 and 718, Waspaloy, titanium, stainless steel and aluminum. The shop supports prototype through production requirements and is built around precision, traceability and dependable manufacturing performance.

Apply today

If you are an experienced VTL machinist who can build the setup, prove out the process and deliver a conforming large-diameter part, apply today through hireCNC.