From Halopedia, the Halo wiki
Vosper Engineering is a human company based out of Luna in the Sol system. The company was responsible for the construction of orbital defense platforms to protect Earth from invasion. Among the ODPs built by Vosper Engineering were Athens Station, Cairo Station, and Malta Station. The company is also involved in the construction of smaller dropships and shuttlecraft, producing the D82-EST Darter supply transport, SKT-9 Bumblebee lifeboat and the shuttle pods used for exterior ship inspections and maintenance across the UNSC Navy.
Vosper Engineering shares its name with Paul Vosper, a technical artist who worked at Bungie. It is unknown whether Vosper Engineering was specifically named after Paul Vosper.