The register
The register lists HSI UK PTY LTD in London 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 the business as HSI UK PTY LTD, company number 16090962, a private limited company. Registered office: Duo, Level 6, 280 Bishopsgate, London, EC2M 4RB, EC2M 4RB. 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.