OISESA OFFICES info@oisesa.org +27 10 157 2317 5 2nd Rd, Hyde Park, Johannesburg, 21946 Visit our Offices OISESA has secured offices in the Yale Suites, Fountain Grove Office Park in Hyde Park, Johannesburg. These small, serviced offices have access to the group’s spacious shared boardrooms and other amenities, in a centre called The Pavilion.