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Mechanical Design Engineer

First Light Fusion Ltd
Oxfordshire, UK
Posting live until
8 Mar 2024

Job Details

We are looking for a Mechanical Design Engineer to join our growing Engineering Design Team. You will be responsible for the mechanical design of assemblies related to experimental campaigns on our electromagnetic launchers and light gas guns.

As an engineer in First Light Fusion you will be designing and building state of the art technology to help push the company towards achieving fusion for energy generation.

Projects will range from complex target design and development to upgrading our existing pulsed power machines to improve their performance.

We believe this is an exciting and varied role as you will operate in a broad range of core projects in a fast-paced environment.

Responsibilities will include:

  • Working with our Experimental team and our Internal Workshop to develop target designs to a high level of accuracy and repeatability;
  • Using 3D CAD to produce engineering drawings working to BS8888 following best engineering practice;
  • Supporting the design process with technical specifications, design reviews and change management;
  • Providing expert engineering input into multidisciplinary teams;
  • Leading root cause analysis and engaging with our internal fault management processes;
  • Ensuring manufactured components are delivered on time and as specified.


  • You will have an HND or degree (BEng) in mechanical engineering;
  • Minimum of 2 years engineering design experience using a mainstream CAD system. Training on the system used by us (Solidworks) can be provided;
  • Understand DFMA principles for low volume R&D design and manufacture;
  • Extensive experience with Geometric Dimensioning and Tolerancing (GD&T) and performing tolerance stack analysis;
  • Fast and effective problem-solving skills;
  • Ability to work under pressure to tight deadlines;
  • Strong communication and interpersonal skills;
  • Focus on safety and environmental impacts of your designs.


  • Ability to perform FEA analysis and engineering calculations;
  • Experience with a drawing management system such as PDM;
  • Experience of designing in a research environment with some of the following technologies: vacuum systems, laser systems, pressure vessels, high voltage, laser systems, cryogenics, lifting equipment;
  • Knowledge of precision manufacturing techniques.


First Light

First Light Fusion is a company established in 2011 focused on researching energy generation by inertial confinement fusion. Building on the success of the National Ignition Facility, we are designing and building the largest pulsed power machine in the world to demonstrate an ignition experiment that will lead to a power plant.

Why work for us
We are a small company with a huge mission. The only important aspect for the team, and for everyone, is the contribution they can make. 

Bringing together a team of highly skilled people dedicated to one mission forms a fantastic environment and culture where every person contributes and learns from each other.

We are fast paced and the work is incredibly varied – no week is the same.

Training and development
We are keen on collaboration and publishing. Typically people attend several conferences a year and will attend technical skill courses and summers school as needed.

The team has expertise and mentoring in many disciplines ranging from data science, software engineering, theoretical physics, ultra-high-speed diagnostics to warehouse management.

We also have an extensive management training course.

Graduate schemes
Typically graduates join as a graduate scientist and will either rotate around the department or sit within a dedicated group. Training happens through a mentorship scheme, line management and on-the-job training. Within the first year you would be trained up to be able to lead and deliver projects in line with the core science plan.

What we are looking for

  •  Smart, independent thinkers with a great attitude and a genuine interest and drive to solve the fusion energy challenge.
  • Supportive team members who push us forward and make us better.

Oxford, UK

Number of employees

Main areas of research
Inertial fusion physics, pulsed power, high-energy density physics, diagnostics, data science, simulations

Positions recently recruited for
Experimental physics scientist, target design scientist

Desired degree disciplines/class
Physics, engineering or relevant degrees

Eligible to work in the UK

How to apply
Apply online at

Closing date
All year round 

Tel +44 (0)1865 807670

Company info
01865 807 670
Unit 10, Oxford Pioneer Park
Mead Rd, Yarnton

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