Jillette Leon-Guerrero has a BA in Anthropology from the University of Guam, an MA in Human Relations from the University of Oklahoma and a certificate in Genealogical Research from Boston University. She is the President of Guamology Inc., a Guam based publishing company. 

Leon-Guerrero has a passion for historical research especially as it relates to Guam. She is an active genealogist currently working toward her professional board certification. She is especially interested in trying to find a link between families of Guam and the Northern Mariana Islands. She has done professional genealogical research for Ancestry.com's research arm. She has also contracted with individual the early Spanish colonial period in Guam and possible descendants in modern day families and legal offices to carry out genealogical research.