Who do the janitors work for?
A. The vast majority of the janitors work for cleaning contractors, not directly for the management of the office building. There are five cleaning companies that dominate the Houston commercial office market–ABM, OneSource, GCA (until recently called ABS), Sanitors, and Pritchard. Together, these companies clean more than 72% of Houston’s office space. All five of these companies are national corporations and employ union janitors elsewhere in the country.