The register
The register lists Quadrature Climate Foundation 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 Quadrature Climate Foundation (company number 12194319), a company limited by guarantee incorporated in 2019, 7 years ago. The registered office is at 10 Queen Street Place, London, EC4R 1AG, EC4R 1AG. By its SIC codes the business is in professional and technical services. It has traded under other names before, including QCF.
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.