The register
The register lists Sismep Ltd in Greenford 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 Sismep Ltd (company number 12044292), a private limited company incorporated in 2019, 7 years ago. Registered office: 56 Fraser Road, Perivale, Greenford, UB6 7AL, UB6 7AL. By its SIC codes the business is in construction.
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.