Manassas City Of--engineering 9027 Center St Manassas, VA 20110 Phone : (703) 257-8227 Business Category Government Offices-City Village & Twp Government Offices State & Local Legislative Bodies Government Offices & Public Schools Manassas City Of--question, Engineering Civil Manassas, VA 20108 Phone : (703) 257-8227 Business Category Government Offices & Public Schools