Senior Machinist III: Lead Large-Part CNC & HBM Programming

GNB KL Group; Elk Grove (CA); On-site; USD 55,000 - 83,000; Full time

Benefits offered by this job

401(k)

401(k) Match

Flexible spending account

Health insurance

Health savings account

Life insurance

Paid time off

Vision insurance

Job summary

GNB KL Group in Elk Grove, CA is seeking a Senior Machinist (Machinist III) to program, plan, fixture, setup, and machine large parts using Horizontal Boring Mills. You will design custom fixtures, work with overhead cranes, and lead on complex one-off projects in a custom shop environment.

Applicants must show real large-part HBM and CNC programming experience. The role emphasizes hands-on programming, mentorship of junior machinists, and technical leadership on shop floor decisions.

Qualifications

• Requires CNC programming + HBM + large-part experience
• Experience in designing and building custom fixtures
• Ability to program, plan, fixture, setup, and machine large parts independently
• Strong capability in GD&T interpretation and blueprint reading

Responsibilities

• Program complex parts using Mastercam or similar CAM software
• Set up and operate Horizontal Boring Mills
• Develop efficient machining strategies for one-off and short-run work
• Hold tight tolerances on distortion-prone parts
• Perform first-article and in-process inspections
• Design, fabricate, and modify custom fixtures
• Plan setups considering load paths, deflection, and thermal movement
• Troubleshoot machining, alignment, vibration, and access challenges
• Support manufacturability and continuous improvement efforts
• Safely rig, lift, rotate, and position large components
• Execute multi-step setups involving overhead crane repositioning
• Understand center of gravity, load limits, and safe handling practices
• Act as a senior technical resource on the shop floor
• Mentor Machinist I & II team members
• Recommend machining approaches and best practices
• Assist with tooling, cutter, and fixturing selection
• Provide input for ordering specialty tools and cutters for upcoming jobs

Skills

CNC programming

HBM operation

Large-part machining

Custom fixturing design

Overhead crane handling

GD&T interpretation

Ownership of jobs

Blueprint reading

Tools

Mastercam

CAM software

Job description

GNB KL Group in Elk Grove, CA is seeking a Senior Machinist (Machinist III) to program, plan, fixture, setup, and machine large parts using Horizontal Boring Mills. You will design custom fixtures, work with overhead cranes, and lead on complex one-off projects in a custom shop environment.

Applicants must show real large-part HBM and CNC programming experience. The role emphasizes hands-on programming, mentorship of junior machinists, and technical leadership on shop floor decisions.