The register
The register lists ProtoCool Limited in Aldermaston, Bershire 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 Protocool Limited (company number 08509599), a private limited company incorporated in 2013, 13 years ago. Registered office: Unit 1, Comet House Calleva Park, Aldermaston, Reading, RG7 8JA, RG7 8JA. Its filed activity puts it in construction.
What the licence tells a candidate is that the door is not locked. Whether it is open this month is a question for ProtoCool Limited's own careers page and the job boards, and the answer changes with the season and the order book.