Serving the Portland Metro Area. We specialize in serving your school, clinic, hospital, or commercial building cleaning and janitorial needs. Give us a call today for more information or a free estimate. Strong Tower’s purpose can be summed up by simply stating, “Serving you with Integrity.” We do this by creating a company culture of Integrity, -starting with our leadership team down to our staff in the field. At Strong Tower, we leave no stone unturned as we work to deliver the finest cleaning services available. Certifications: Minority Business Enterprise (MBE) Women Business Enterprise (WBE)