The register
The register lists SulNOx Group Plc in London 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 Sulnox Group PLC (company number 08449586), a public limited company incorporated in 2013, 13 years ago. Registered office: 10-12 Orange Street, London, WC2H 7DQ, WC2H 7DQ. Its filed activity puts it in manufacturing. It has traded under other names before, including Sulnox Fuel Fusions PLC.
For a candidate this means one less obstacle: SulNOx Group Plc already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.