The register
The register lists Altomart Ltd in Harrow, Middlesex as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Altomart Limited is the registered name (Companies House number 02674658), a private limited company on the register since 1991. Registered office: Suite 2, Rama Apartments, 17 St. Anns Road, Harrow, Middlesex, HA1 1JU, HA1 1JU. Its filed activity puts it in construction.
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.