Before joining Utah in 2003, he worked in industry (IBM and AT&T), government (Sandia and LLNL), and academia (Stony Brook and OGI). He received his Ph.D. in Computer Science from the State University of New York at Stony Brook in 1996, and his B.S. in Mathematics from the Federal University of Ceara (Brazil) in 1990. He co-authored over 60 technical papers and 4 patents. He serves on the editorial board of the IEEE Transactions on Visualization and Computer Graphics, and on numerous program committees. He was co-chair of IEEE Symposium on Volume Visualization and Graphics 2004 and the IEEE Symposium on Parallel and Large-Data Visualization and Graphics 2003. He will be papers co-chair of the IEEE Visualization 2005.