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Metal working production and maintenance fitters assemble, install and repair metal machinery, engines and industrial equipment, and SOC 5223 is sponsorable on the Skilled Worker route as a genuine skilled trade occupation, distinct from general factory labouring.
The work is hands-on and typically factory- or site-based: fitting components to precise tolerances, diagnosing faults on production machinery, carrying out planned and reactive maintenance, and working from technical drawings or manufacturer specifications. Employers include manufacturing plants, engineering firms, agricultural and construction equipment makers, and companies maintaining industrial machinery under contract. Some fitters split time between a workshop and client sites, which should be reflected accurately in the job description used for sponsorship.
Fitters who work at client sites or under service contracts
A meaningful share of SOC 5223 roles aren't based in a single factory at all — the sponsor is a maintenance contractor, an equipment manufacturer's field service team, or an engineering firm servicing machinery on customer premises. That's a legitimate way to structure the job, but it sits close to a line worth watching carefully: a sponsor licence has to be used to directly employ and manage the sponsored worker, not to supply them as contracted-out labour to a third party who then effectively directs their day-to-day work. If a fitter spends most of their time on a client's site taking instructions from the client's own supervisors, with the sponsoring employer having little real involvement beyond payroll, that arrangement deserves a proper look against the sponsor guidance on contracted labour before a CoS is assigned, not after a question is raised about it.
Where site visits are genuinely part of the job — commissioning new equipment, scheduled maintenance rounds, breakdown callouts — say so plainly in the job description, and be able to show that supervision, appraisal and day-to-day direction of the fitter still sit with the sponsoring employer rather than the client.
Site access, safety cards and permits
Fitters who work outside a single controlled factory environment often need more than their trade qualification to actually get on site. Client premises, construction sites and some industrial plants require a recognised safety card or equivalent induction before anyone is allowed through the gate, and lifting or pressure equipment used in fitting and maintenance work is usually subject to its own statutory inspection regime, with the fitter expected to work within a permit-to-work system rather than freelancing around it. None of this is an immigration requirement, but a sponsor should treat it as part of the same readiness check as the visa paperwork: a worker who is fully sponsored but turned away at a client's gate for lacking the right card isn't actually able to do the job that was described on the CoS, and repeated gaps like this can make a role look less genuine than it is.
Why the pay check matters here
Skilled trade roles like this often sit closer to the salary threshold than office-based management roles, so it is worth checking the specific going rate for SOC 5223 against the actual hourly or annual pay on offer, including whether any overtime or shift allowance is being counted correctly, and cross-checking against the general salary floor that applies regardless of occupation.
Qualifications and records that back up the trade code
Because this is a trade code rather than a management one, evidence of genuine skilled duties matters more than job title. Worth keeping on file for each sponsored fitter:
- Apprenticeship completion, NVQ Level 3 (or international equivalent), or clearly documented time-served trade experience
- Manufacturer or equipment-specific training certificates, particularly for hydraulics, PLC-controlled machinery or specialist engine types
- A sample of job sheets or work orders showing diagnostic and precision-fitting work rather than repetitive assembly-line tasks
- Supervisor sign-off records on completed jobs
Across a growing engineering workforce, keeping training certificates, job sheets and site records organised is a lot more manageable with structured document storage than with paper files scattered across a workshop office.
Questions worth answering before sponsoring
Does SOC 5223 cover welders too? Welding is typically classified under its own related trade code rather than 5223, so a job that is primarily welding rather than fitting or mechanical assembly may need a different occupation code — check the definitions carefully rather than assuming.
What evidence shows genuine skilled-trade duties rather than general labouring? Training records, a breakdown of tasks showing diagnostic and precision-fitting work rather than repetitive assembly, and supervisor sign-off on completed jobs all help. Confirm the worker's right to work with a share code check, keep the sponsor licence itself in order with support from a platform like Annaizu, and refer back to the official eligible occupations list if the exact scope of the role is in doubt.
Can a sponsored fitter be placed mainly at a client's premises under a service contract? It depends on who genuinely manages and directs the work day to day. Regular site visits as part of a maintenance contract are different from effectively hiring the worker out to sit inside a client's own team long-term, and the latter can put the sponsor licence at risk if challenged. Where the arrangement isn't clear-cut, it's worth checking the current sponsor guidance on supplying labour to a third party before the CoS is assigned rather than afterwards.
What if the role gradually shifts toward welding, fabrication or CNC programming rather than fitting? If the real balance of duties moves away from what's on the CoS, the job may have effectively changed, and it's worth checking whether SOC 5223 still fits or whether a different occupation code and going rate now applies, rather than assuming the original classification holds indefinitely.
Does a sponsored fitter need a specific safety card to work on client sites? Often yes, depending on the sector and the client's own site rules, and it's worth confirming which card or induction scheme applies well before the start date rather than discovering it on day one, since some schemes have their own qualification and processing time.
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