The register
The register lists S A Group Services 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).
At Companies House the business is S A Group Services Ltd (company number 11558201), a private limited company incorporated in 2018, 8 years ago. Registered office: C/O Kp & Co Avanata House, 79 College Road, Harrow, HA1 1BD, HA1 1BD. Its filed activity puts it in finance and insurance. It has traded under other names before, including S A Group Investments Ltd.
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.