Mare Center 5527 Sullivans Mill Rd Middleburg, VA 20117 Phone : (540) 687-3521 Business Category Government Offices-State Junior Colleges & Technical Institutes Legislative Bodies Virginia Commonwealth Of--virginia Tech, Middleburg Agricultural, Research & Extension Center 5527 Sullivans Mill Rd Middleburg, VA 20117 Phone : (540) 687-3521 Business Category Government Offices-State Government Offices State & Local Government Offices & Public Schools