The register
The register lists Sitehop Ltd in Sheffield 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 Sitehop Ltd, number 13602589, incorporated 2021: 5 years of filings behind the name. The registered office is at 10 John Street, London, WC1N 2EB, WC1N 2EB. Its filed activity puts it in manufacturing and engineering.
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.