is the Civil Engineering, Hydraulics/Fluid Mechanics Vice President with Alden Research Laboratory, Inc. in their Fort Collings, CO location. Dr. Gessler has over 25 years of experience in numeric modeling.

Since joining Alden in 2002, he has served as a senior hydraulic modeler using computational fluid dynamics and physical models to investigate a broad range of hydraulics and river mechanics problems, including complex sedimentation studies and spillway studies. He became Director of Numeric Modeling and is now Vice President and Principal.

Prior to joining Alden, he worked as a research scientist and assistant professor Colorado State University, working on three-dimensional hydrodynamic sediment transport modeling for the corps of engineers.