The register
Rhomberg Sersa UK Limited is licensed to sponsor on Global Business Mobility: Graduate Trainee and Global Business Mobility: Senior or Specialist Worker and Skilled Worker. Its entry on the register dates back to at least 2026, and the organisation is based in Sheffield, South Yorkshire. The register records its rating as Temporary Worker (A rating), Worker (A rating).
At Companies House the business is Rhomberg Sersa UK Limited (company number 03699560), a private limited company incorporated in 1999, 27 years ago. The registered office is at Moorgate House Clifton Moor Gate, York, YO30 4WY, YO30 4WY. By its SIC codes the business is in construction. It has traded under other names before, including Sersa (UK) Limited, Harrowell Shaftoe (no.32) Limited.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.