| 1992 - 1996 | Ph.D. fellowship , Consejo Venezolano de Investigaciones Cientificas y Tecnologicas (CONICIT), Venezuela. | 
| 1997 - 1999 | Wellcome Trust International Fellow, Wellcome Trust, UK | 
| 1998 - 2005 | Member, Brazilian Society of Protozoology (SBPz) | 
| 1999 - 2003 | Post Doctoral Fellowship, Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Sao Paulo, Brazil | 
| 2004 - 2017 | Member,   Member of American Society of Microbiology (ASM | 
| 2004 - 2004 | Visiting Professor, Federal University of Sao Paulo (UNIFESP), Sao Paulo, SP, Brazil, | 
| 2005 - 2017 |  Member,  American Society of Parasitology. | 
| 2005 - 2012 | Member, SIGMA Xi, The Scientific Research Society.  | 
| 2005 - 2017 | Member, Society for Advancement of Chicanos and Natives Americans in Sciences (SACNAS) | 
| 2007 | Honorary Member , Golden Key International Honour Society, UTEP chapter | 
| 2008 - 2017 | Faculty Advisor  of the Student Chapter, American Society for Microbiology | 
| 2011 - 2013 | President, American Society for Microbiology Rio Grande Branch. | 
| 2011 - 2017 | Program Director, Bridges to Baccalaureate-NIH. | 
| 2012 - 2014 | Vice-President, Bridges PD&CO. | 
| 2013 - 2014 | Faculty Advisor of the Year American Society of Microbiology Student Chapter, University of Texas at El Paso | 
| 2014 - 2017 | Director, Border Biomedical Research Center Student Development Program | 
| 2014 - 2015 | Interim President, Bridges PD&CO. |