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all things water®

Contact Us

498 Seventh Ave, 11th Floor
New York, NY 10018

(212) 539-7000

Rion Merlo PhD, PE, PMP

Associate Vice President

Rion Merlo PhD, PE, PMP

Rion is an environmental engineering consultant with extensive experience in both the water and wastewater sectors. He began his career focusing on wastewater process engineering and has led pilot studies, master planning, and numerous projects involving detailed design. At Hazen, Rion is the West Region Wastewater Lead, with significant experience in technical solutions and team leadership for utilities throughout the State of California. He is an expert in master planning for nutrient and resource recovery, developing long-term plans for municipalities across California, including Napa, Antioch, and Oakland.

Areas of Expertise
Wastewater treatment
Water reuse
Membrane bioreactor (MBR) design
Master planning
Nutrient recovery
Professional Activities
Water Environment Federation (WEF)
Project Management Institute (PMI)
PhD, Civil and Environmental Engineering, University of California at Berkeley
MS, Civil and Environmental Engineering, University of California at Los Angeles
BS, Microbiology, University of California at Santa Barbara
Professional Engineer (PE)
Project Management Professional