CNC Programmer

Lamsco West•Santa Clarita, CA

11d

About The Position

The CNC Programmer supports manufacturing operations by developing, testing, and optimizing CNC programs for 3-, 4-, and 5-axis machining centers. Using Mastercam 2025/2026, the role creates accurate and efficient machining processes for aerospace components, tooling, and fixtures. The programmer collaborates with Production, Engineering, Quality, machinists, and other machine-shop personnel to support new-product introduction, resolve manufacturing issues, improve cycle times, and ensure programs produce parts that meet drawing and quality requirements. The position develops machining methods, operation sequences, toolpaths, and setup documentation; supports workholding and tooling design; validates and proves out programs; troubleshoots machining issues; and maintains controlled program files and revision history. It also contributes to corrective actions and continuous improvement in safety, quality, and productivity, while following company safety requirements, using required PPE, and maintaining an orderly work area according to 5S principles.

Requirements

Minimum of three years of CNC programming experience using Mastercam.
Demonstrated experience programming 3-axis CNC machining centers.
Hands-on CNC machining, setup, or machine-operation experience.
Advanced proficiency with Mastercam, including toolpath creation, simulation, and post-processing.
Strong understanding of G-code and M-code, including the ability to review and make controlled manual edits.
Knowledge of cutting tools, toolholders, workholding, feeds and speeds, machining practices, and fixture concepts.
Ability to read and interpret complex engineering drawings, specifications, and GD&T.
Experience creating setup sheets, tooling lists, and CNC program documentation.
Experience proving out new programs and troubleshooting programs at the machine.
Familiarity with inspection methods, measuring equipment, and first-article requirements.
Ability to organize multiple assignments and meet production priorities with limited supervision.
Clear verbal and written English communication skills, including the ability to understand drawings, work instructions, and technical documentation.
Ability to work effectively with machinists, supervisors, Engineering, and Quality personnel.
Reliable attendance and flexibility to adjust work hours when required to support machine setup, program prove-out, or production needs.

Nice To Haves

Minimum of five years of combined CNC machining and programming experience preferred.
Experience programming positional or simultaneous 4- and 5-axis CNC machining strongly preferred.
Experience machining aluminum, stainless steel, and titanium preferred.
Aerospace or other tight-tolerance manufacturing experience strongly preferred.
Experience with SAP or another ERP/MRP system preferred.

Responsibilities

Create and maintain CNC programs using Mastercam 2025/2026 for 3-, 4-, and 5-axis machining.
Develop machining methods, operation sequences, and toolpaths from engineering drawings, solid models, and specifications.
Design or support the design of workholding fixtures, tooling, and manufacturing aids.
Select appropriate cutting tools, holders, workholding methods, feeds, and speeds.
Create setup documentation, including setup sheets, tooling lists, work offsets, and program instructions.
Read and interpret engineering drawings, specifications, and GD&T requirements.
Generate, review, and validate G-code and M-code using approved post-processors.
Manually edit CNC programs when necessary for setup, troubleshooting, and controlled process adjustments.
Test, simulate, prove out, and troubleshoot new or revised programs at the machine.
Work with machinists and Quality personnel during first-piece and first-article inspection.
Ensure CNC programs, setup documentation, and revisions are properly identified and controlled.
Troubleshoot dimensional, tooling, surface-finish, and machine-performance problems.
Optimize existing programs to improve cycle time, tool life, machine utilization, quality, and productivity.
Review part designs and recommend improvements to manufacturability, tooling, fixturing, and machining methods.
Maintain organized electronic program files, models, setup documents, and revision history.
Support corrective actions involving CNC programming or machining-process issues.
Identify opportunities to use new tooling, programming methods, and technology to improve safety, quality, and productivity.
Follow company safety requirements, use required PPE, and maintain an orderly work area in accordance with 5S principles.
Perform additional duties as assigned.