Manivannan (Mani) NagaiahManivannan (Mani) Nagaiah is a Project Engineer with Langan Engineering and Environmental Services in Phoenix, Arizona. Mani's career has been focused on the management of small to large-scale, complex NAPL sites as well as petroleum release sites with TPH impacts. Since joining Langan in 2006, he has spearheaded several petroleum release investigations, designed and optimized LNAPL recovery systems and corrective actions, and established technically feasible and practical road maps for site closure. Mani has worked on NAPL/petroleum release investigative and remediation projects in the north-east corridor, Georgia and Florida. More recently, he has moved to Phoenix to work in the Southwest.

He has authored peer reviewed publications and presented on a wide-range of LNAPL topics in several national conferences. Since 2016, Mani has been an active participant with the ITRC TPH team and is new to the ITRC training team. He is also the co-author of the accompanying HDOH case studies document for the TPH guidance.  Mani holds a bachelor's degree in Civil Engineering from ACCET, Madurai Kamaraj University in Tamil Nadu, India (2000) and a master's degree in environmental engineering from Oklahoma State University in Stillwater, Oklahoma (2003). Mani is a registered professional engineer and maintains active licensure in several states.