Dr. Mario Hoffman works in the area of soils for transportation facilities and pavement engineering since 1974. He has been involved in projects dealing with design, rehabilitation, construction, supervision, maintenance management and structural evaluation of highway, railway and airport pavements, and with paving materials and asphalt technology.

He has done consulting work in Dominica, Ecuador, U.S.A., Israel, Panama, Peru, Bolivia, Dominican Republic, Grenada and Philippines, and has been engaged in teaching and research activities at the Technion in Israel and at the University of Illinois and Louisiana State University in the US. Dr. Hoffman has authored or co-authored numerous technical papers in refereed professional journals, and is an active member in national and international professional committees and organizations.

Eng. Yehuda Ziss works since 1984 in soils and pavement engineering with emphasis in the management and operation of soils and materials laboratories, implementation of QC/QA in transportation projects, management and supervision of paving projects, specifications writing, and implementation of new paving technologies and materials.

He has done advanced studies in professional soils laboratories in Delft, Holland, and worked with Solel Boneh in Nigeria as the Materials Engineer, and with Mahzavei Even as the asphalt plant manager. Eng. Ziss is an active member of Israeli Standards committees in asphalt and paving materials, and is the expert advisor to the Israeli PWD in specialized asphalt concrete mixtures.