Guillermo Rojas has more than 35 years of experience in computer science and survey data processing. He has provided data processing technical assistance and training for more than 20 surveys. Since the early stages of the Demographic and Health Surveys (DHS) program, Mr. Rojas has been involved in the design and development of the data processing methodology currently being used to process and analyze DHS surveys. He is the primary writer of the master programs for implementing the evolving data processing methodology. Mr. Rojas coordinates all DHS data-processing activities and supervises personnel to ensure the accuracy and quality of the processes implemented.