Tosin Ogunsile was born in Nigeria. He is known by his students as Mr. T. He earned his B.S. Honors from CUNY Brooklyn College in Chemistry and his M.Sc Engineering from The Catholic University of America in Materials Science and Engineering with concentration in Nanotechnology.
He began co-teaching Math and Science in College at STAR High School in Brooklyn, New York. He has taught in the District since 2014 and currently teaches at Ballou Senior High School. He is a D.C Teaching Fellow and became a Math ƒor America Master Teacher in 2016.