Wanted: Commission-Based Sales Representatives in the Field of Construction Waste Containers. Kaffa Environmental Services in Riyadh announces the opening of collaboration with sales and marketing representatives (field and online) on an immediate generous commission basis in the contracting and environmental services sector. About the Work: At Kaffa, we work in the field of renting and supplying construction, demolition, and renovation waste containers in various sizes, targeting construction projects, contracting companies, and owners of buildings and villas.