Balaji Seshasayee, PE

Balaji Seshasayee is a Principal Environmental Engineer based in Illinois with more than 10 years of experience focused on water and wastewater treatment and remediation technologies.

Balaji Seshasayee is a Principal Environmental Engineer based in Illinois with more than 10 years of experience focused on water and wastewater treatment and remediation technologies.


Balaji has led design of several treatment systems at complex sites for recalcitrant and emerging contaminants such as per- and polyfluoroalkyl substances (PFAS), 1,4 dioxane, and perchlorate for federal, industrial, and municipal clients. He has conducted and overseen several pilot and bench scale treatability studies to develop treatment system designs, including for multiple CERCLA-regulated sites. In addition to his work on treatment system design, Balaji has significant experience with construction oversight, commissioning, operations support, and process optimization of large treatment systems. He has supported multiple industrial clients in their efforts to reduce the water footprint of their industrial processes through water balance evaluations and process optimizations. Balaji also helps clients with site strategy including support with regulatory interactions, permitting and contractor coordination.

With experience with a wide array of technologies, Balaji helps clients deploy thermal, biological, adsorption, ion-exchange, membrane, advanced oxidation process, and physical/chemical reaction-based technologies for remediation and treatment.

To further advance the state of the practice, Balaji frequently works with technology vendors to perform evaluations of new and emerging technologies and is actively involved in testing and development of remediation technologies for PFAS. His efforts have specifically focused on the development and evaluation of technologies for PFAS-impacted stormwater and groundwater to reduce overall cost and waste generated through treatment.

Contact Balaji Seshasayee at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1 312-416-3941.

Career Summary of Balaji Seshasayee, PE

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  • Specialties: Feasibility Studies and Remediation System Design; Per- and Polyfluoroalkyl Substances (PFAS); Remediation System Operation and Optimization; Treatability and Pilot Studies; Industrial Wastewater Treatment Systems; Groundwater Assessment and Remediation
  • Practice Areas: Contaminated Site Assessment and Cleanup, Civil Infrastructure, Waste Management
  • Disciplines: Environmental Engineering
  • Education: M.A., Public Policy, University of Chicago, 2019; M.S., Civil & Environmental Engineering, Carnegie Mellon University, 2010; B.Tech., Chemical Engineering, Anna University, 2009
  • Registration: Oregon Professional Engineer. License No. 91635PE

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