---
title: 'Manufacturing Engineer - CNC Machining at Rennscot MFG'
canonical: 'https://feeny.ai/job/manufacturing-engineer-cnc-machining-rennscot-mfg-woburn-ppw42yxzts3j'
type: 'job'
last_seen: '2026-09-11'
---

# Manufacturing Engineer - CNC Machining at Rennscot MFG

- **Company:** Rennscot MFG
- **Location:** Woburn, MA
- **Compensation:** $75k–$150k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-08-19
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/rennscotmfg/442503b6-15cd-41fb-a249-48426d79b4c7

## Job description

Summary The Manufacturing Engineer is a key role within our Engineering department, responsible for the full lifecycle of CNC programming and process development across 2, 3, 4, and 5+ axis turning and milling machines. This role owns its work — from tooling selection and fixture design through prove-out, operator training, and continuous improvement — and is expected to deliver production-ready results with a high degree of accuracy and accountability.

## Responsibilities

- Develop manufacturing processes including tooling and raw material selection, fixture design, and CNC programming in Fusion 360 and/or Hypermill across 2, 3, 4, and 5+ axis turning and milling machines.
- Write CNC programs including advanced techniques such as macro programming, Q variable programming, and in-process probing.
- Conduct post-program prove-out for error checking and run time reduction.
- Identify root causes of dimensional errors, rework, and inefficiency; lead and implement corrective actions.
- Design quality, safety, and dimensional integrity controls into new technical work.
- Produce and maintain setup documentation in ProShop ERP including tooling lists, work-holding instructions, program references, and run notes.
- Manage multiple concurrent components and projects to meet quality and lead-time requirements.
- Troubleshoot geometric errors in multi-axis machinery to resolve dimensional issues.
- Train machine operators on developed processes — covering machine operation, tooling use, and the reasoning behind each step.
- Mentor CNC programmers and operators; share best practices and support team development.
- Support process standardization and departmental improvement efforts.
- Support other projects and assignments as needed.

## Experience & Skills

You should be able to come in and:

- Read and interpret technical drawings and GD&T callouts and translate them directly into a machining strategy.
- Build a CNC program from scratch in Fusion 360, Hypermill, or a comparable CAM platform — and know why you made the toolpath choices you did.
- Select tooling, set speeds and feeds, and design a workholding approach appropriate for the part geometry and material.
- Prove out your own programs, catch your own errors, and reduce run time without sacrificing quality.
- Troubleshoot a dimensional miss — trace it back to root cause and fix it, not just compensate for it.
- Use calipers, micrometers, indicators, and other metrology tools accurately and routinely.
- Operate on Haas and/or Heidenhain controllers with confidence; familiarity with controller-level troubleshooting is a plus.
- Document a setup clearly enough that an operator can run it without you in the room.
- Manage several active jobs at once without losing track of quality or delivery commitments.

Physical Requirements

- On-site, machine shop environment. Overtime and occasional non-standard hours may be required.
- Regular standing, walking, bending, stooping, and kneeling throughout the facility.
- Occasional lifting up to 50 lbs; team lifts required for heavier loads.
- PPE required on the shop floor at all times (safety glasses, hearing protection, steel-toed footwear).
- Manual dexterity and visual acuity required to read technical drawings, GD&T callouts, and operate precision measurement tools.

## About Rennscot MFG

Rennscot MFG, founded in 2017, started as a motorsports-focused shop in the aftermarket automotive industry. Now, they are a leading provider of advanced manufacturing services located in Woburn, MA. Rennscot MFG strives to be more than just a machine shop; they solve problems in innovative ways, using a suite of integrated services to fuel a passion for ideation. With a focus on diversifying into commercial and critical technology sectors, Rennscot MFG delivers cutting-edge technologies and unwavering commitment to quality. They offer a comprehensive range of services, including reverse engineering, metal & polymer additive manufacturing, and precision machining to support various industries’ needs. For more information, visit [rennscotmfg.com](http://rennscotmfg.com).

ITAR Requirement 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: https://www.pmddtc.state.gov/ddtc_public/ddtc_public?id=ddtc_public_portal_itar_landing.

## EEO Statement

Rennscot MFG is an Equal Opportunity Employer; employment with Rennscot MFG 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.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

## About Rennscot MFG

## Company Overview
- **One-liner**: Rennscot MFG is an AS9100-certified contract manufacturer specializing in metal 3D printing and advanced CNC machining for aerospace, defense, automotive, and medical customers.
- **Entity Type**: Private (bootstrapped; no disclosed funding rounds)
- **Headquarters**: Woburn, Bedfordshire, England, UK (additional U.S. office locations; operates two facilities totaling 80,000 sq. ft.)
- **Founded**: 2017
- **Founders**: Not publicly disclosed

## Core Business
- **Primary Industry**: Additive manufacturing / advanced machining (manufacturing services)
- **Target Customers**: Aerospace, defense, automotive, and medical OEMs; B2B, typically mid-to-large enterprises and government prime contractors
- **Mission / Purpose**: To provide cutting-edge solutions for the future of aviation, auto, and space exploration while simplifying supply chains and reducing risk for critical programs.

## Products & Services
- **Metal 3D Printing (Additive Manufacturing)**: Production and prototyping of complex metal parts using a fleet of 8 advanced 3D printers.
- **Advanced CNC Machining**: 5-axis and multi-axis machining with 15 CNC machines, including 9 fully automated systems.
- **Machining of AM Parts**: Post-processing and finishing for additively manufactured components.
- **Quality CMM Inspection**: In-house metrology and quality assurance.
- **Project Engineering**: Full-service design-for-manufacturing support.
- **Precision Assembly**: Light assembly and kitting services.

## Market Standing
- **Valuation / Market Cap**: Not publicly available (private company)
- **Key Metric**: Total operating space of 80,000 sq. ft. across two facilities; employs 26 staff (as of 2025).
- **Notable Investors / Partners**: None disclosed; appears self-funded.
- **Growth Signals**: Expanded from a 42,000 sq. ft. facility to 80,000 sq. ft. by 2025; holds AS9100 aerospace quality certification; serves "the world's most advanced industries and customers."

## Competitive Advantages
- **AS9100 Certification**: Qualifies Rennscot to manufacture for aerospace and defense primes.
- **Vertical Integration**: In-house design, printing, machining, inspection, and assembly under one roof.
- **Automation & Scale**: 9 fully automated CNC systems reduce lead time and improve repeatability.
- **Employee Equity Program**: Share Appreciation Rights offer ownership-like upside to all employees, rare for a private manufacturer.

## Strategic Focus
- **Current Priorities**: Deepening aerospace/defense business, expanding 3D printing capacity, and investing in automation for high-volume production.
- **Direction for Growth**: Targeting the future of aviation, space exploration, and advanced automotive applications; likely to scale headcount and facility footprint further.

## Why Work Here
- **Culture**: Described as "more than just a machine shop" — a collaborative, innovation-driven environment with a focus on solving complex manufacturing challenges.
- **Work Policy**: Hybrid workspace for some roles (combination of remote and on-site); many positions are in-office at the Woburn, UK location.
- **Benefits & Perks**:
  - Competitive medical, dental, and vision insurance
  - Life and long-term disability insurance
  - 401(k) with company match
  - Share Appreciation Rights (employee equity program)
  - Electric vehicle incentive + free EV charging
  - On-site gym
  - Maternity leave
- **Engineering Culture**: Engineers work across additive and subtractive processes, with opportunities to participate in the full product lifecycle from design to delivery.

## Sources
1. [rennscotmfg.com](https://www.rennscotmfg.com/) – Company overview, capabilities, and credentials
2. [rennscotmfg.com/careers](https://www.rennscotmfg.com/careers) – Benefits and equity program
3. [jobs.ashbyhq.com/rennscotmfg](https://jobs.ashbyhq.com/rennscotmfg) – Current open roles
4. [builtin.com](https://builtin.com/company/rennscot-mfg) – Employee count, hybrid policy, and office location

## Other roles at Rennscot MFG

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