Richard Castillo Callueng is a licensed mechanical engineer with over 12 years of experience in plant operations and maintenance management. He currently serves as the Plant Manager at Philippine Hydro Inc, where he oversees the operation and maintenance of the water treatment plant. Prior to this role, he held engineering positions at ECOCSA, Maynilad Water and Services Inc, and Program Management Group, where he gained experience in project planning, budgeting, and quality control. He has expertise in management, team building, and strategic planning.