Do I need to call in pest control?

depending on what type of roach they are will determine what sort of treatment you may want to do...if it is just the large outdoor species you can treat along the foundation of your home yourself with a residual insecticide and probably stop them. Go with the product that attaches to the garden hose and treat a 3-4 foot barrier around the structure. If it is the smaller German roach you are seeing the gel baits in the large syringe were made for these.