The register
The register lists Shelter Tech UK Ltd in Uxbridge 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 Shelter Tech UK Limited, number 07207434, incorporated 2010: 16 years of filings behind the name. Registered office: Suite A Island Site, Eskdale Road, Uxbridge, Middlesex, UB8 2RT, UB8 2RT. 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.