The register
The register lists Atrium Workforce Solutions UK Ltd in London 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).
Companies House lists it as Atrium Workforce Solutions UK Limited, number 05486006, incorporated 2005: 21 years of filings behind the name. Registered office: Quadrant House Floor 6, 4 Thomas More Square, London, E1W 1YW, E1W 1YW. By its SIC codes the business is in professional and technical services. It has traded under other names before, including Gibbs Hybrid Limited, Gibbs S3 Limited.
For a candidate this means one less obstacle: Atrium Workforce Solutions UK Ltd already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.