The register
The register lists Hydrotechnik Test Engineering UK Ltd in Nottingham as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Hydrotechnik UK Test Engineering Limited, number 02551583, incorporated 1990: 36 years of filings behind the name. Registered office: 1 Central Park, Lenton Lane, Nottingham, NG7 2NR, NG7 2NR. Its filed activity puts it in wholesale. It has traded under other names before, including Hydrotechnik UK Limited.
Holding a licence is the expensive, slow part done. For Hydrotechnik Test Engineering UK Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.