The register
The register lists Snow White Cleaning Services Ltd in Slough as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Snow White Cleaning Services Ltd, number 12840347, incorporated 2020: 6 years of filings behind the name. Registered office: The Porter Building, 1 Brunel Way, Slough, SL1 1FQ, SL1 1FQ. By its SIC codes the business is in construction.
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.