Senior Machinist – Machinist III 4-Axis 3D PAYCOR

GNB KL Group•Elk Grove, CA

5d•Onsite

About The Position

We are seeking a highly skilled 4-Axis CNC Programmer/Machinist to support complex, high-value machining work requiring strong process ownership, advanced setup strategy, and in-process probing/verification. This role is centered on a Doosan NHP 8000 horizontal machining center with pallet changing and a B-axis rotary table. The successful candidate will own jobs end-to-end — CAM programming → fixturing → setup → probing → machining → inspection → optimization — in a custom, non-production environment. This is not a production operator role and not a “run existing programs” position. This role is for a Senior Machinist (Machinist III) who can program, set up, and machine complex 3D parts on a 4-axis horizontal machining center, and who has hands-on experience with Renishaw probing, including creating and modifying probing routines and subroutines/macros. Applicants without CAM programming + 4-axis experience + probing capability will be screened out.

Requirements

CNC Programming (Required) Mastercam (preferred) or comparable CAM software (NX, Fusion, PowerMill, etc.)
Creation and optimization of 3D toolpaths for complex geometry
Experience programming 4-axis machining using B-axis rotation
Ability to post, prove out, and safely run new programs
Solid understanding of work offsets, tool control, and collision avoidance
4-Axis / Complex 3D Machining (Required) Hands-on experience machining complex 3D parts on horizontal machining centers
Effective use of 4-axis positioning (B-axis) to access multiple faces and reduce setups
Ability to hold tight tolerances and produce high-quality surface finishes
Advanced blueprint reading and GD&T
Renishaw Probing + Routine Programming (Required) Hands-on use of Renishaw probing systems for part pickup and alignment, work offset setting and updating, bore/boss location verification, and in-process inspection and verification checks
Ability to create and edit probing routines
Experience writing or modifying probe subroutines/macros to improve repeatability and reduce setup time
Workholding & Process Ownership (Required) Experience designing and building custom fixtures
Comfortable owning jobs independently from programming through completion
Horizontal machining experience strongly preferred
Experience using pallet-changing machines a plus
Resume must clearly include: CAM software used (Mastercam or equivalent), Description of 4-axis machining experience, Examples of complex 3D parts programmed and machined, Renishaw probing experience and what it was used for, Whether probe routines/subroutines/macros have been written or edited, Machine types operated (horizontal machining centers preferred)

Nice To Haves

Mastercam (preferred)
Horizontal machining experience strongly preferred
Experience using pallet-changing machines a plus

Responsibilities

Program and optimize parts using Mastercam or equivalent CAM software
Machine complex parts using 4-axis positioning on a horizontal machining center
Develop efficient machining strategies to reduce setups and improve accuracy
Prove out programs and optimize feeds, speeds, and toolpaths
Generate tooling strategies appropriate for complex geometry
Use Renishaw probing for setup, alignment, and verification
Write and modify probing routines and subroutines/macros for automated setup routines, work offset updates, and feature verification and inspection checkpoints
Adjust machining strategy based on probing and inspection results
Design and build fixtures for rigidity, accuracy, and repeatability
Plan setups to minimize part handling and eliminate secondary operations
Manage deflection, distortion, and access challenges through smart workholding
Diagnose and correct chatter, surface finish issues, tool wear, and alignment problems
Modify programs and processes based on inspection data
Improve repeatability, first-article success, and cycle efficiency
Serve as a technical resource for CNC machining and probing practices
Support continuous improvement in CAM workflows and shop standards
Provide input on tooling and cutter selection for upcoming work