The register
The register lists RNSS Ltd in London 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 Rnss Limited, number 04191961, incorporated 2001: 25 years of filings behind the name. Registered office: 1 Sheffield Road, Southborough, Tunbridge Wells, Kent, TN4 0PD, TN4 0PD. By its SIC codes the business is in manufacturing.
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.