Evolving Service is your source for janitorial cleaning services in Lexington, Waltham, Woburn, Wilmington, Concord, Burlington and the surrounding Boston Ma areas. With over 30 years in the commercial cleaning business, we stand the test of time. In fact 70% of our clients have stayed with us for over 11 years. If you've struggled with retaining janitorial cleaning companies, then make the switch to the company that sticks!