Please come to our office on Tuesday, Wednesday or Thursday between 9 a.m. and 1 p.m. to fill out an application. Shamrock Maintenance, Inc was incorporated in 1973. We presently employ approximately 100 managers, supervisors, janitors and project personnel. We provide janitorial services to commercial buildings and schools in Baltimore City and the surrounding counties. We provide commercial janitorial services, floor maintenance service, carpet cleaning and window washing. Please allow us to visit your site and give you a customized quote based on your individual janitorial needs.