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Rennscot LLC

CNC Programmer & Machinist - Multi-axis

Rennscot LLC, Woburn

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Rennscot, an innovative manufacturing company, is seeking a highly skilled CNC Programmer & Machinist to join our team. This role is critical in developing and optimizing machining processes for complex, high-precision components in industries such as aerospace, defense, and space technologies. The ideal candidate will have extensive experience in multi-axis CNC programming, with a strong preference for expertise in Open Mind hyperMILL. This position requires a hands-on engineer who can develop robust, automated machining processes, oversee first article prove-outs, and ensure reliable, repeatable production. Candidates should be comfortable working with advanced probing routines, interpreting CMM data, and making process adjustments to improve quality and efficiency.

Description

Responsibilities

  • Develop, optimize, and prove out multi-axis CNC machining processes for complex parts.
  • Program CNC machines usingOpen Mind hyperMILL(experience with Fusion 360, ESPRIT, or Siemens NX is a plus).
  • Design and fabricate custom workholding solutions, including fixtures for machining and inspection (e.g., CMM fixturing).
  • Conduct first article prove-outs, verify setups, and refine programs for efficiency and reliability.
  • Develop lights-out machining strategies, implementing automation to maximize unattended run time.
  • Utilize advanced probing techniques to align components, particularly additive-manufactured parts, castings, and forgings.
  • Interpret CMM inspection results, identify potential risks, and adjust machining strategies to ensure dimensional accuracy.
  • Collaborate with the quality team to troubleshoot machining and inspection challenges.
  • Create detailed setup documentation within ProShop ERP to support repeatable production.
  • Provide guidance to entry-level programmers and operators when needed.
  • Identify and implement continuous improvement initiatives to optimize processes, tooling, and cycle times.

Required Skills & Qualifications

  • 6+ years of CNC programming experience, with an emphasis on multi-axis milling and mill-turn processes.
  • Expertise in Open Mind hyperMILL (Fusion 360, ESPRIT, or Siemens NX experience is a plus).
  • Strong understanding of GD&T, CNC tooling, and high-precision machining strategies.
  • Experience developing lights-out machining and automated processes.
  • Hands-on experience with fixture design and fabrication.
  • Experience with advanced probing routines for part alignment and CMM inspection interpretation.
  • Strong troubleshooting skills related to machine performance, part accuracy, and process optimization.
  • Experience with high-performance materials such as titanium, Inconel, and other nickel-based alloys.
  • High attention to detail and a results-driven mindset.

Preferred Skills & Qualifications

  • Experience modifying post-processors for CAM software.
  • Experience programming and working with automation systems, including robotic loading (UR, Fanuc, etc.).
  • Familiarity with Haas, Okuma, GROB, and Mikron machines and their respective controls (OSP, Heidenhain, Haas).
  • Background in post-machining of additively manufactured components.

Physical Demands

  • Standing for extended periods
  • Lifting/moving objects up to 50 lbs
  • Working in an industrial environment requiring PPE (eye protection, hearing protection, etc.)

To conform to US Government export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a US citizen, lawful permanent resident of the US, protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the US Department of State. Learn more about the ITAR here:

Company Benefits

  • Company sponsored health, dental, and vision insurance
  • Long-term disability insurance
  • Annual vacation and personal days
  • Floating holidays
  • 401(k) with company match
  • Electric Vehicle incentive program
  • Share Appreciation Rights (SARs) program

Rennscot is an Equal Opportunity Employer; employment with Rennscot is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

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