The register
The register lists Keller Group Plc in London as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker and Skilled Worker, 2 routes in all, and has done since at least 2026. Its rating on the register is Worker (A rating).
Keller Group PLC is the registered name (Companies House number 02442580), a public limited company on the register since 1989. The registered office is at 2 Kingdom Street, London, W2 6BD, W2 6BD. By its SIC codes the business is in professional and technical services. It has traded under other names before, including Chidworth Limited.
Holding a licence is the expensive, slow part done. For Keller Group Plc the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.