Invited Speaker, Inovações na Educação de Pós-grduação no Contexto das Tecnologias de Aprendizagem [Innovations in Graduate Education in the Learning Technologies Context], Rio de Janeiro State University, Rio de Janeiro, Brazil, October 28, 2019.
Invited Speaker, Pesquisa e Pós-Graduação stricto sensu na Modalidade On-line [Research and Post-Graduate Education stricto sensu in On-line Modes], 39th Associação Nacional de Pós-Graduação e Pesquisa em Educação Annual Meeting, Niterói, Brazil, October 20-24, 2019.
Invited Speaker, 2018 EdMedia: World Conference on Educational Media and Technology, Amsterdam, Netherlands, June 25-29, 2018.
Invited Speaker, University of Minho’s Research Center in Children Studies, Braga, Portugal, June 14, 2018.
Keynote speaker, 2017 Mid-Western Educational Research Association Annual Conference, Evanston, IL, Oct 20, 2017.
Keynote speaker, XIV Puerto Rican Educational Research Congress, San Juan, Puerto Rico, March 8-10, 2017.
Invited Panelist, International Federation for Information Processing, Technical Committee 3 Joint Members’ Meeting, Guimarães, Portugal, July 6-8, 2016.
Keynote speaker, Iowa Distance Learning Symposium / IDLA Spring Symposium – 2016, Des Moines, IA, March 22, 2016.
Invited Panelist, Joint Partners’ Meeting on Improved MSc in Cultivar Development for Africa, Kampala, Uganda, August 1-9, 2015.
Invited Panelist, 2nd Uludağ Üniversitesi Research & Development Days, Bursa, Turkey, November 13-15, 2012.
Invited Speaker, Middle East Technical University, Ankara, Turkey, November 16, 2012.
Invited Speaker, 1st International Seminar on Teacher Education through Distance Education (I Seminário Internacional de Formação de Professores através da Educação a Distância), Rio de Janeiro State University (Universidade do Estado do Rio de Janeiro), Rio de Janeiro, Brazil, August 4, 2009.
Member of International Advisory Board, Hong-Kong AECT 2018 Summer International Research Symposium, Hong Kong Baptist University, Hong Kong, China, 25 – 27 July 2018.
Member of Scientific Committee, X International Conference on ICT in Education – Challenges 2017, University of Minho, Braga, Portugal, May 8-10, 2017.
Member of International Advisory Board, HKAECT x AECT 2017 Summer International Research Symposium, University of Hong Kong, Hong Kong, 15-17 June 2017.
International Consultant, Centre for Higher Education Innovation, a UNESCO Category 2 Institute, Shenzhen, China (November 14-15, 2015).
Visiting Researcher, Portuguese Open University (Universidade Aberta), Lisbon, Portugal (August-December 2013).
Local Advisor, Executive Committee of the World Conference on Educational Multimedia, Hypermedia and Telecommunications (ED-MEDIA 2011), July 2011, Lisbon, Portugal organized by the Association for the Advancement of Computing in Education
Program Chair, American Educational Research Association Special Interest Group in Online Teaching and Learning (2016-2019).
Chair, American Educational Research Association Special Interest Group in Design and Technology (2015-2016).
Program Chair, American Educational Research Association Special Interest Group in Design and Technology (2011-2015).
President, Association for Educational Communications and Technology Research and Theory Division (2010-2013).
Founder and leader Learning Design Research Group (2007-2016, Iowa State University).
Founder and leader Learning Design Solutions (2009-2016, Iowa State University).
Director, Graduate Certificate in Instructional Design (2012-2016, Iowa State University).
Team Leader, School of Education Curriculum and Instructional Technology Group (2012-2014, Iowa State University).