The register
The register lists SM Autos in Sheffield 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 SM Autos Ltd, number 05703818, incorporated 2006: 20 years of filings behind the name. Registered office: Second Floor, The Annexe New Barnes Mill, Cottonmill Lane, St. Albans, Hertfordshire, AL1 2HA, AL1 2HA. Its filed activity puts it in motor trade and vehicle repair.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.