The register
The register lists HSO Customer Service Ltd in Reading as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Hso Customer Service Limited, number 07145287, incorporated 2010: 16 years of filings behind the name. The registered office is at 3rd Floor Jackson House, Sibson Road, Sale, M33 7RR, M33 7RR. Its filed activity puts it in it, software and media. It has traded under other names before, including Hso Customer Services Limited, Hso Enterprise Solutions Limited.
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.