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GM Reynaldo C. Liwanag is a Mechanical Engineer. He completed his degree at Holy Angel University in 1978.
He is an active member of the Philippine Society of Mechanical Engineers. GM Rey is likewise involved in water district associations like Pampanga Association of Water District (PAMAWD) where he is currently the President, Water Environment Association of the Philippines, Inc. (WEAP) and Philippine Water Works Association (PWWA).
He is also into Four Wheeling (Off-road). He is the Chairman of the Board of the Angeles City Four Wheel Drive Club.