The register
The register lists Advanced Technology Services UK 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).
At Companies House the business is Advanced Technology Services, UK Limited (company number 06254555), a private limited company incorporated in 2007, 19 years ago. The registered office is at Unit 4 Cherry Hall Road, North Kettering Business Park, Kettering, NN14 1UE, NN14 1UE. By its SIC codes the business is in other services.
For a candidate this means one less obstacle: Advanced Technology Services UK Limited already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.