Graduate in Civil Engineering at the Cauca University in Colombia (1986), DEA in geotechnics and structures, Ecole Centrale de Paris (1987), PhD in Geotechnics and Structures Ecole Centrale de Paris (1991). Professor at Los Andes University since 1991. Member of the editorial board of Geotechnique Letters, Acta Geotechnica and the Journal of Transportation Geotechnics. Referee for several international journals. Supervisor of 95 master thesis, 12 doctoral thesis in Uniandes. Leader of more than 65 research projects in pavements and geotechnics in Uniandes. Editor of one book and author of 80 conference papers and 36 journal papers.