---
title: 'Sr. or Pr. Manufacturing Engineer, Machining at Rennscot MFG'
canonical: 'https://feeny.ai/job/sr-or-pr-manufacturing-engineer-machining-rennscot-mfg-woburn-82dayh6f2g4j'
type: 'job'
last_seen: '2026-11-06'
---

# Sr. or Pr. Manufacturing Engineer, Machining at Rennscot MFG

- **Company:** Rennscot MFG
- **Location:** Woburn, MA
- **Compensation:** $150k–$250k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-21
- **Last confirmed live:** 2026-11-06
- **Apply:** https://jobs.ashbyhq.com/rennscotmfg/0c703ecd-04ee-48f1-b511-7f19bc1c1550

## Job description

## About the Role

We are looking for a CNC machining expert. The level depends on your experience. If you take ownership, lead with technical depth, and care about doing the work right — this role is worth a look. You will be one of our most experienced technical voices in CNC machining. That means working on our hardest problems, building the processes and standards others will rely on, and helping teammates grow.

## What You'll Do

- Technical Leadership. You will own our most technically demanding CNC manufacturing engineering process projects — multi-axis programming, tooling, fixturing, and everything in between. Helping set the long-term direction for our machining capabilities and contribute to how the broader industry thinks about these problems.
- Build the standards. You will develop the guidelines, workflows, and documentation frameworks that keep our work consistent and scalable — including how we structure setup documentation in ProShop ERP so that process knowledge is captured, accessible, and transferable.
- Champion process integrity. You will partner with our quality engineers to drive real, measurable quality improvements through better measurement strategies, in-process checks, and process controls across programming and production. You will also play a key role in defining the safety standards and process guidelines that protect process consistency across our operations.
- Work with customers and stakeholders. You will help translate customer requirements into sound manufacturing decisions, communicating clearly about trade-offs and outcomes with customers, partners, and internal leaders.
- Mentorship. You will mentor engineers, machinists, and operators — not just showing them what to do, but helping them understand why, so they can solve problems on their own.
- Innovate. You will find better ways to machine parts and build processes that expand what our team can do. This means work that shapes industry practice, not just internal practice.

## What We're Looking For

We are open to a range of educational backgrounds — what matters most is what you have done and the impact you have made.

- Senior Engineer: 14+ years (H.S. Diploma) | 12+ years (A.A.) | 7+ years (Bachelor's) | 5+ years (Master's) | Ph.D.
- Principal Engineer: 16+ years (H.S. Diploma) | 14+ years (A.A.) | 9+ years (Bachelor's) | 7+ years (Master's) | 2+ years (Ph.D.)
- You have hands-on experience taking parts from prototype to full production — and you know how to document and hand off processes so operators can run them reliably.
- A degree in Engineering, Manufacturing, or a related field is a plus for the Senior role and strongly preferred for the Principal role.
- You have a strong working knowledge of GD&T, metrology, and dimensional quality management.
- Experience working in a regulated manufacturing environment (AS9100, ISO 13485, or equivalent) is required.
- You are highly proficient in operating and programming multi-axis CNC machines.
- Experience with Hypermill, ESPRIT, and/or Fusion 360 is strongly preferred.
- Familiarity with Haas, Okuma, and/or Heidenhain CNC controllers

## Who You Are

- You do precise, high-quality work and follow through on your commitments — even when the stakes are high and the work is hard.
- You communicate clearly, work well with people at all levels, and consistently look for ways to do things better.
- You stay current on new technologies and tools and bring what you learn back to the team in practical ways.

Job Type: On-Site Job Location: Woburn, MA. At this time, we are only considering applicants within a 100-mile radius. No relocation assistance provided.

## 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

- [Senior Project Manager, Aerospace & Defense](https://feeny.ai/job/senior-project-manager-aerospace-defense-rennscot-mfg-woburn-xxhm4k3rp43x) — Woburn, MA
- [Senior Process Engineer,  Additive Manufacturing](https://feeny.ai/job/senior-process-engineer-additive-manufacturing-rennscot-mfg-woburn-5m7hdqrhj5r5) — Woburn, MA
- [CNC Machinist/Operator](https://feeny.ai/job/cnc-machinist-operator-rennscot-mfg-woburn-724ea3wqjdwm) — Woburn, MA
- [Quality Engineering Co-op - Spring 2027](https://feeny.ai/job/quality-engineering-co-op-spring-2027-rennscot-mfg-woburn-dn5xn6mg64aq) — Woburn, MA
- [Subtractive Manufacturing Engineering Co-Op - Spring 2027](https://feeny.ai/job/subtractive-manufacturing-engineering-co-op-spring-2027-rennscot-mfg-woburn-5dq1edhbnrya) — Woburn, MA
- [Additive Manufacturing Engineering Co-op - Spring 2027](https://feeny.ai/job/additive-manufacturing-engineering-co-op-spring-2027-rennscot-mfg-woburn-15czqz2nz2ah) — Woburn, MA
- [Project Engineer](https://feeny.ai/job/project-engineer-rennscot-mfg-woburn-jt0teye7wjk5) — Woburn, MA
- [Facilities & EHS Manager](https://feeny.ai/job/facilities-ehs-manager-rennscot-mfg-woburn-7j6tgacwpnrb) — Woburn, MA
- [Industrial Engineering Co-Op](https://feeny.ai/job/industrial-engineering-co-op-rennscot-mfg-woburn-44xhegyt59xb) — Woburn, MA
- [Zeiss CMM Programmer](https://feeny.ai/job/zeiss-cmm-programmer-rennscot-mfg-woburn-xvrq2pzs0br8) — Woburn, MA