Jose Lorenzo M. Sin is a full time faculty member of the University of Santo Tomas - Senior High School (STEM Strand). He obtained his bachelor's degree in Education Major in Mathematics in the same institution. He is also a mathematics teacher-trainer in the Private Education Assistance Committee (PEAC) of the Philippines where he gives content and pedagogy retooling seminars all over the country. In 2016, he formed part of the development team for the Senior High School Learner's Material in General Mathematics under the Department of Education. He is currently a Master of Science candidate for the MS Mathematics Education Program at the Ateneo de Manila University.