Mark Hanna, Ph.D., P.E., LEED AP

Mark Hanna is a Senior Principal Water Resources Engineer based in Southern California with more than 25 years of experience focused on water and natural resources. His experience in civil engineering, water resources, hydrology and hydraulics, and environmental restoration planning and implementation allows him to offer public, private, and non-profit clients comprehensive solutions to the growing problems of water resources, risk, and vulnerability in the natural and built environment.

Mark specializes in water supply, large system hydraulics, hydrology, surface water and groundwater management, sustainability, and resilience. He also has extensive experience in flood risk management, water rights, watershed planning, hydrologic and hydraulic modeling, permitting, funding, multi-beneficial project development, and water conservation. In particular, his practice focuses on three critical water resource areas across the Southwestern United States: local water resource development; restoration, revitalization, and resiliency planning related to urban and coastal waterways; and imported water.

His passion continues to be the restoration and revitalization of urban and natural landscapes, focusing on resiliency and sustainability related to water resources, ecological systems, and infrastructure, and how these impact health, equity, and displacement. Mark directs multi-benefit integrated water resource projects across many client sectors. He directs the engineering design and development of Lauren Bon's and the Metabolic Studio's "Bending the River Back into the City" project capturing and treating over 100 acre-feet per year of urban runoff for beneficial use. Mark manages and directs the County of Los Angeles' update of their 51-mile Los Angeles River Master Plan, and often leads Frank Gehry's water resources team along the Los Angeles River. He consults on the renewal and redevelopment of multiple large parcels along the Los Angeles River from Canoga Park to Long Beach, including the Piggyback Yard, the Aliso Creek Confluence, the Headworks parcel, the Rio Hondo Confluence, and retired rail yards along the main river corridor. Mark recently developed a "stormwater as a water supply" feasibility study for the Water Replenishment District of Southern California, leveraging water quality requirements with water supply needs resulting in the design, funding, implementation, and successful operation of the award-winning Broadway Neighborhood Greenway Project. Mark also managed the Los Angeles Department of Water and Power's award-winning Stormwater Capture Master Plan that defined the potential for stormwater to offset future water demands within the City of Los Angeles.

Contact Mark Hanna at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-310-957-6100.

Career Summary: Mark Hanna, Ph.D., P.E., LEED AP

  • Specialties: Water Supply; Surface Water and Groundwater Hydrology; Flood Risk Management; River Restoration and Revitalization; Sustainability and Resilience; Natural Resources Management
  • Practice Areas: Water and Natural Resources
  • Disciplines: Civil Engineering, Natural Resources and Ecological Sciences, Water Resources Engineering, Hydrology
  • Education: Ph.D., Civil Engineering, University of California, Los Angeles, 2004; M.S., Civil Engineering, University of California, Los Angeles, 1999; B.S., Civil Engineering, University of Colorado, Boulder, 1995
  • Registration: California Professional Engineer, 67575; LEED AP

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Geosyntec Consultants
Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure.

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