The register
The register lists Viettech UK Ltd in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. The register records its rating as Worker (A rating).
At Companies House the business is Viettech UK Ltd (company number 15344291), a private limited company incorporated in 2023, 2 years ago. The registered office is at 202 Cobham House Pegler Square, London, SE3 9GW, SE3 9GW. By its SIC codes the business is in professional and technical services.
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.