SEI Offers New Format for Continuing Education Courses Sep, 2005 By Roberto Leon, P.E., Ph.D. and Donald O. Dusenberry, P.E., SECB, F.SEI, F. ASCE In Articles, Editorial This article is currently only available in PDF format, please click the link to the top right. About the author ⁄ Roberto Leon, P.E., Ph.D.Roberto Leon, P.E., Ph.D., Professor, Via Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA, USA. Prev Fallingwater Is No Longer Falling Next Preservation Engineering