---
title: 'Senior Process Engineer,  Additive Manufacturing at Rennscot MFG'
canonical: 'https://feeny.ai/job/senior-process-engineer-additive-manufacturing-rennscot-mfg-woburn-5m7hdqrhj5r5'
type: 'job'
last_seen: '2026-11-06'
---

# Senior Process Engineer,  Additive Manufacturing at Rennscot MFG

- **Company:** Rennscot MFG
- **Location:** Woburn, MA
- **Compensation:** $125k–$165k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-11-02
- **Last confirmed live:** 2026-11-06
- **Apply:** https://jobs.ashbyhq.com/rennscotmfg/0491bfad-1167-466e-a2f3-094e8f654899

## Job description

## About the Role

We’re looking for an industry-experienced, hands-on senior engineer with direct metal additive manufacturing experience — someone who has qualified materials and processes, troubleshot builds, analyzed failures and test results, and turned technical findings into reliable production solutions. You’ll own our metallurgical test lab, lead material and process qualifications across multiple alloy systems, and work directly with AM equipment, materials, engineering, quality, and production to solve technical challenges and establish robust manufacturing processes.

## What You'll Do

- Build and operate our metallurgical test lab. Take our internal test lab from concept to day-to-day operation. You’ll help select and qualify equipment, establish test methods and procedures, develop calibration and maintenance requirements, and train others to use the equipment correctly. Capabilities will include particle size distribution, porosity characterization, mechanical testing, and microstructural analysis.
- Lead hands-on material and process qualification. Develop and execute qualifications for stainless steel, nickel, titanium, aluminum, and other alloy systems. You’ll work directly with AM processes and equipment to establish parameters, run trials, evaluate results, and qualify processes to customer and industry requirements, including AMS, ASTM, and SAE standards.
- Troubleshoot real manufacturing problems. When a build, material, or test result doesn’t meet expectations, you’ll help determine why. You’ll use metallurgical analysis, process data, structured experimentation, and hands-on investigation to identify root causes and implement practical corrective actions.
- Own qualification from planning through execution. Lead IQ/OQ/PQ activities, DOE-based studies, process-window development, validation testing, documentation, and technical reporting. You’ll manage multiple qualification efforts and be accountable for driving them through completion.
- Partner directly with manufacturing. Work closely with engineering, quality, and production to translate metallurgical requirements into processes that work on the shop floor. You’ll help establish build and validation documentation in ProShop ERP and develop practical training for the team.
- Advance our AM capabilities. Identify better ways to qualify materials, validate processes, evaluate results, and solve emerging technical challenges as Rennscot’s additive manufacturing business grows.

## 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.

- 12+ years (H.S. Diploma) | 10+ years (A.A.) | 5+ years (Bachelor's) | 3+ years (Master's) | Ph.D.
- A bachelor's or master’s in metallurgical engineering, materials science, or a closely related field is preferred.
- Direct, hands-on experience with metal additive manufacturing processes such as laser powder bed fusion, DED, or binder jetting
- Experience developing, qualifying, or improving AM materials and manufacturing processes in an industrial environment
- Practical experience troubleshooting AM builds, material issues, defects, or process variation
- Hands-on metallurgical testing experience, including microstructural analysis, porosity, mechanical testing, and/or powder characterization
- Experience working with stainless steel, nickel, titanium, aluminum, or similar alloy systems
- Experience executing process or equipment qualification, including IQ/OQ/PQ or comparable validation methodologies
- Working knowledge of AMS, ASTM, SAE, customer specifications, or similar manufacturing standards
- Experience using DOE, statistical analysis, and process data to make manufacturing decisions
- Ability to translate metallurgical principles — including solidification, phase transformations, microstructure, and defect formation — into practical process decisions
- Experience documenting qualification activities, test results, technical findings, and recommendations that can withstand internal and customer review
- · Experience standing up or operating a metallurgical lab, working in aerospace or another highly regulated manufacturing environment, and qualifying AM processes for production applications is strongly preferred.

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

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