What are the responsibilities and job description for the Lathe and Mill Supervisors position at Granite State Manufacturing?
Granite State Manufacturing (GSM) is seeking two motivated professionals to join our leadership team on first shift; one to lead our Lathe Cell and one to lead our Milling Cell.
These roles are ideal for experienced CNC Machinists or Leads ready to step into a supervisory position. You’ll lead teams producing precision, large-scale components for the U.S. Navy submarine program and other mission-critical defense applications.
About the Opportunity:
As a Lathe or Mill Supervisor, you’ll oversee daily machining operations in your assigned cell, coordinating workflow, mentoring machinists, and ensuring safety, quality, and schedule adherence. You’ll partner with Planning to dispatch work in accordance with the schedule and drive throughput across a diverse mix of manual and CNC platforms, including Doosan VTLs, Doosan HBMs (DBC series), Doosan 5-Axis (DVF series), and Mazak and Mori verticals.
Key Responsibilities:
- Lead day-to-day operations in the assigned Lathe or Mill machining cell.
- Partner with Planning to schedule and release jobs IAW production plans.
- Review, verify, and approve weekly payroll for assigned team members.
- Provide technical guidance on setups, tooling, and process optimization for large and precision components.
- Verify first-piece quality and ensure all work meets AS9100, NAVSEA, and customer contract requirements.
- Develop machinists through mentoring, cross-training, and skill certification.
- Promote a culture of safety, discipline, and continuous improvement.
- Collaborate with Quality, Engineering, and Production Control to resolve technical and scheduling challenges.
Qualifications:
- 5 years of CNC machining experience — Lathe or Mill specialization required.
- Proven background in large-part machining (Doosan VTL, HBM, or equivalent platforms preferred).
- Prior lead, setup, or trainer-level experience is highly desirable.
- Strong ability to interpret blueprints, GD&T, and process plans.
- Experience with Fanuc, Heidenhain, Mazatrol, or Okuma OSP controls.
- Excellent communication, organization, and leadership skills.
- Commitment to safety, quality, and team development.
Why Join GSM:
- Grow from machinist to supervisor — leadership development encouraged.
- Work on large, high-precision Navy and defense components using Doosan, Kuraki, Mazak, and Mori equipment.
- Competitive pay, benefits, and long-term stability in a growing defense manufacturer.
- Contribute directly to U.S. Navy submarine readiness and national security.