Designation of Engr. EFREN C. MANALO as OIC - District Engineer of the Cavite District Engineering Office. Category: Special OrderSub Category: areas-responsibilities-authority-designationSeries: 2005No: 83File: SO_083_S2005.pdfDate: Thursday, August 18, 2005Tags: Designation EFREN MANALO OIC DE Cavite IV-A 083Region: Region IV-A Read more about Designation of Engr. EFREN C. MANALO as OIC - District Engineer of the Cavite District Engineering Office.