Cleaning Specialist. Glenn’s Market & Catering is looking for. a Cleaning Specialist. Who we are. For over 35 years, our family has served Watertown with a commitment to offer quality goods, champion local purveyors, and create a workplace for our staff to learn and prosper. We are ever evolving to not lose sight of our core values and remain mindful of the old world character of a neighborhood market. We personally know many of our vendors, havi...