is currently a Sr. Scientist at Cargill Industrial Specialties, responsible for research and development of bio-based specialty chemicals, with special focus on asphalt rejuvenators and rheology modifiers, adhesion promoters, and emulsion systems.

His publications and reports cover a broad range of topics, especially the development of characterization methods and models for assessment of modified asphalt performance and distress mechanisms. He was directly involved in development of a number of draft AASHTO specifications as part of the Asphalt Research Consortium (ARC) project, most notably the Single Edged Notched Bending (SENB) test and the Asphalt Thermal Cracking Analyzer (ATCA) for determination of the glass transition and fracture strength of asphalt binders and mixtures.

He received his Ph.D. degree in Civil Engineering from the University of Wisconsin Madison, after completing his MS and BS degrees at Sharif University of Technology.

He is currently an active member of a number of task forces and committees. He is a member of the FHWA Expert Task Group (ETG) task force on Reclaimed Asphalt Pavement and Reclaimed Asphalt Shingle AASHTO standard specifications, as well as the task force on Intermediate Temperature Performance Specification. He is a member of the Transportation Research Board AFK20 subcommittee on "Characteristics of Asphalt Materials", as well as a member of the Asphalt Institute Foundation Research Committee.