The register
The register lists Information Security Media Group UK LTD in Windsor, Berkshire as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Information Security Media Group UK Ltd, number 11234457, incorporated 2018: 8 years of filings behind the name. The registered office is at Charterwells Suite 8, 2nd Floor, 43-45 High Road, Bushey Heath, WD23 1EE, WD23 1EE. Its filed activity puts it in other services.
What the licence tells a candidate is that the door is not locked. Whether it is open this month is a question for Information Security Media Group UK LTD's own careers page and the job boards, and the answer changes with the season and the order book.