CNC Mill Programmer; 5-Axis

About the Position

Seiler Precision Manufacturing in St. Louis is seeking an innovative, highly skilled CNC Programmer with a minimum of 10 years of CNC programming experience focused on 4‑ and 5‑axis milling for complex, tight‑tolerance components. This role supports cutting‑edge defense and aerospace programs and requires expert‑level Mastercam and Solid Works proficiency, including demonstrated capability in simultaneous 5‑axis toolpaths and advanced milling strategies.

Candidates must possess a strong command of GD&T, along with deep knowledge of modern machining practices, tooling, work holding, and process optimization. We are looking for professionals who bring forward‑thinking ideas that enhance efficiency, accuracy, and throughput. Strong communication skills and a collaborative, improvement‑driven mindset are essential.

Seiler is offering a $5,000 sign on bonus for this position!

• Medical, Vision, and Dental health plans
• Parental and Bonding Leave
• PTO
• 401(k) Matching
• Tuition Reimbursement
• 9 annual paid holidays
• 1‑2 free company events every summer
• Employee Assistance Program (EAP)
• Flexibility in start/stop time for most positions
• Profit Sharing and More!

• Program complex aerospace and defense components for multi‑axis machining, with a strong emphasis on advanced 5‑axis milling strategies, tight tolerances, and challenging geometries.
• Develop and optimize CNC programs using modern CAM software (Mastercam).
• Design and validate effective work holding and fixturing solutions for high‑precision production, prototype runs, and multi‑operation machining.
• Collaborate directly with machinists, engineers, and leadership to improve cycle times, tool life, quality, and process stability.
• Create, maintain, and update detailed setup sheets and machining work instructions to support repeatable, high‑quality processes.
• Support introduction of new technologies—including machine upgrades, tooling advancements, probing/inspection strategies, and automation systems.

• Minimum 10 years of experience in CNC programming with a strong focus on 4 and 5‑axis milling for complex, tight‑tolerance components.
• Expert‑level Mastercam experience required, including simultaneous 5‑axis toolpaths.
• Proficiency in Solid Works.
• Proven ability to design, validate, and optimize fixtures, tooling strategies, work holding, and setup plans for multi‑axis machining.
• Thorough knowledge of materials and machining characteristics (aluminum, steels, stainless, titanium, nickel alloys, etc.).
• Experience collaborating on process optimization, cycle time reduction, tool life improvement, and setup efficiency.
• Ability to troubleshoot complex multi‑axis machining issues and support machinists on the shop floor.
• Clear, professional communication skills with a strong team‑oriented, improvement‑driven attitude.