The register
The register lists Sdem Erectors UK Ltd in London, Hertfordshire as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
At Companies House the business is Sdem Erectors UK Ltd (company number 13599766), a private limited company incorporated in 2021, 5 years ago. Registered office: 923 Finchley Road, London, NW11 7PE, NW11 7PE. By its SIC codes the business is in other services.
For a candidate this means one less obstacle: Sdem Erectors UK Ltd already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.