Adri Stockton started the mobile x-ray company that was to become On-Site Occupational Health (OSOH) X-rays in 1999 with only one x-ray unit and one employee.

In 2008 Adri was named as one of the national business women of the year by the South African Council for Business Women.

Margot Ferreira joined OSOH X-rays as a radiographer in 2002, but quickly moved up the ranks to manager and in 2007 became a partner.

Today On-Site Occupational Health X-rays has 13 x-rays units at their disposal and a staff compliment of 34 permanent employees.