The register
Sitemate Services UK Limited, London, holds a Home Office sponsor licence covering 2 routes: Global Business Mobility: Senior or Specialist Worker and Skilled Worker. It has been on the register since at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Sitemate Services UK Ltd, number 14874947, incorporated 2023: 3 years of filings behind the name. Registered office: 10 John Street, London, WC1N 2EB, WC1N 2EB. Its filed activity puts it in it, software and media.
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.