In 1990-1991, he was with the DSP research group at Universidade de Brasilia, as a research associate. He joined Xerox Corp. in 1994, where he was a member of the research staff until 2002. In 2000-2001 he was also an Adjunct Faculty at the Rochester Institute of Technology. He joined the Electrical Engineering Department at Universidade de Brasilia in 2003. In 2010, he became a Full (Titular) Professor at the Computer Science Department at Universidade de Brasilia. During 2015 he has been a Visiting Professor at the University of Washington, in Seattle.

Dr. de Queiroz has published extensively in Journals and conferences and contributed chapters to books as well. He also holds 46 issued patents. He is a past elected member of the IEEE Signal Processing Society's Multimedia Signal Processing (MMSP) and the Image, Video and Multidimensional Signal Processing (IVMSP) Technical Committees. He is a an editor for IEEE Transactions on Image Processing and a past editor for the EURASIP Journal on Image and Video Processing, IEEE Signal Processing Letters, and IEEE Transactions on Circuits and Systems for Video Technology. He has been appointed an IEEE Signal Processing Society Distinguished Lecturer for the 2011-2012 term.

Dr. de Queiroz has been actively involved with IEEE Signal Processing Society chapters in Brazil and in the US. He was the General Chair of ISCAS'2011, MMSP'2009, and SBrT'2012. He was also part of the organizing committee of many SPS flagship conferences. His research interests include image and video compression, point cloud compression, multirate signal processing, and color imaging. Dr. de Queiroz is a Fellow of IEEE and a member of the Brazilian Telecommunications Society.