The register
The register lists SNS IT Limited 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 Sns IT Limited, number 05270547, incorporated 2004: 22 years of filings behind the name. The registered office is at 8 Robinia House, Garden Way, London, NW10 0PQ, NW10 0PQ. By its SIC codes the business is in it, software and media.
Holding a licence is the expensive, slow part done. For SNS IT Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.