Senior CNC Programmer - Prototype Engineer

Senior CNC Programmer - Prototype Engineer Location: Livermore, CA Compensation: $125k - $160k/yr + Comprehensive Benefits Are you a highly skilled CNC Programmer looking for an opportunity to work on challenging, precision-engineered components in a state-of-the-art facility instead of repetitive production work? An industry-leading precision manufacturer is seeking an experienced CNC Programmer / Prototype Engineer to support complex aerospace, defense, semiconductor, and advanced technology programs. This is an opportunity to play a critical role in developing machining strategies, programming sophisticated multi-axis equipment, and driving manufacturing excellence in a high-mix, low-volume environment. Key Responsibilities: Develop and optimize CNC programs using Mastercam for highly complex precision components. Program 3-axis, 4-axis, and 5-axis machining centers, as well as CNC turning platforms (Mill/lathe) Create setup sheets, tooling plans, work instructions, and fixture concepts. Improve machining efficiency through cycle-time reduction, tool-life optimization, and process improvements. Validate and prove out programs at the machine to ensure production readiness and process capability. Collaborate with machinists, engineers, and quality teams to solve technical manufacturing challenges. Analyze feeds, speeds, tooling, workholding, coolant strategies, and cutting conditions. Support prototype and production manufacturing projects requiring tight tolerances and exceptional quality standards. Drive continuous improvement initiatives focused on throughput, repeatability, and operational excellence. Required Qualifications: Minimum 7+ years of CNC programming experience with demonstrated expertise in MasterCAM and CAD-driven programming for prototype work Strong Mastercam programming experience. Expertise programming 3-axis, 4-axis, and 5-axis CNC equipment. Strong GD&T and blueprint interpretation skills. Deep understanding of machining theory, tooling, fixturing, workholding, and material machinability. Experience supporting high-mix, low-volume manufacturing environments. Familiarity working within AS9100 quality systems. Preferred but not required: Aerospace, defense, semiconductor, medical device, or other highly regulated manufacturing experience. HyperMill experience. Vericut simulation and program verification experience. Experience with prototype and complex close-tolerance machining. Benefits: Competitive Pay Medical, dental, vision coverage 401(k) with company match (immediate vesting) Employee Stock Purchase Plan (ESPP) PTO + paid holidays Tuition reimbursement Disability insurance For this position you must be currently authorized to work in the United States. We do not sponsor for this position.