Graduate Mechanical Engineer

About You As a Graduate Mechanical Engineer, you will take full ownership of mechanical subsystems for our particle accelerator and target station hardware, carrying each project through design, analysis, manufacture, test and integration. You think in CAD and calculations first, but you don't stop at the drawing board - when a design needs proving out, you're just as happy on the shop floor, machining a part or brazing a joint yourself to get it right. You are a generalist by nature, happy to move across the whole system rather than settle into one narrow piece of it, and you move with a sense of urgency, favouring building and testing over waiting for formal sign-off. About StandardX There is infrastructure that defines eras. The steam engine made the industrial world possible. The internet created an economy. StandardX is building the next one. Many of the world’s most critical technologies rely on synthetic isotopes, yet the infrastructure used to produce them is ageing, fragmented and increasingly unable to meet demand. We're an elite team of nuclear engineers, deep tech operators and doctoral-level scientists who have built the machine that fixes that. A single proprietary platform, deployable anywhere, producing the full portfolio of critical isotopes at scale. Elite team. Massive problem. If you want to work on something that matters, really matters, this is it. Abundance, as standard. Key Objectives Take full ownership of mechanical subsystems, from concept through design, analysis, manufacture, test and integration.Develop hardware for particle accelerator and target station systems, including vacuum vessels, precision alignment systems and support structures.Build and maintain the tooling that supports in-house manufacturing and integration.Move quickly and pragmatically, avoiding analysis paralysis and unnecessary process gates. Your Responsibilities Mechanical Design & OwnershipAct as a Responsible Engineer with full ownership of your projects through design, analysis, manufacture, test and integration.Develop mechanical subsystems for particle accelerator and/or target stations, including:Vacuum vesselsPrecision alignment systems for electromagnets and RF cavitiesVacuum stages for diagnosticsSupport structuresFacility radiation shieldingBrackets to support pipes and/or electrical cabling Analysis & ValidationPerform static structural FEA and validate models against physical test resultsInterpret and create mechanical drawings using GD&T, including tolerance stack-up analysis Hands-On FabricationMachine your own parts on a mill or latheDesign and build tooling to support in-house manufacturing and integrationWork confidently across manufacturing processes such as CNC, sheet metal, welding and brazing Speed & PragmatismMove fast without waiting for formal readiness gates or excess processOperate as a generalist across the full system rather than staying narrowly specialised Requirements Recent graduate with hands-on experience designing, building and testing hardware (e.g. Formula Student, competitive university team, or startup experience)1+ years of CAD experience with OnShape, SolidWorks, Fusion 360, NX, Catia, Creo, or similarExperience with static structural FEA, including validating the model against physical testExperience machining your own parts on a mill or latheComfortable in a workshop with common hand tools and power toolsFull-time availability before the end of AugustWillingness to work on-site in London Ideal Experience Experience interpreting and creating mechanical drawings with GD&T and performing tolerance stack-up analysisExperience creating shell models in FEMAPKnowledge of UHV systems - vacuum pump types and trade-offs, UHV interfaces and design rulesExperience writing safety margin tables Benefits Private Health Cover, with the option to add dependants.Life Assurance (Death in Service) at 4x salary.Salary sacrifice pension, with 4% employer contribution.Cycle to Work Scheme.EMI Share Options.