President of Watearth, Inc. is one of the first 500 engineers to receive the Diplomate, Water Resources Engineer certification (D.WRE). Walker has a Masters in Civil Engineering, is a Certified Flood Plain Manager, and is a licensed Professional Engineer in multiple states.

Walker's experience includes developing a California statewide LID modeling tool for Phase II communities in collaboration with California State Sacramento's Office of Water Programs, which is funded by the State Water Resources Board. Walker is also Principal developer of a model on behalf of the Texas Water Development Board to evaluate water conservation Best Management Practices statewide. Walker is a certified Permaculturist with over 20 years of hands-on construction and maintenance experience with LID and has trained tens of thousands in water resources and Green Infrastructure.