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Sean Gleeson is an accomplished Senior Developer at Teaching Textbooks since June 2018, overseeing the development of various educational products. Previously, Sean founded Daily Hashi in July 2017, creating a popular daily logic puzzle, and served as a Senior Programmer at Delaware Resource Group from July 2011 to June 2017, where computer-based training applications were developed for military and commercial clients. An adjunct professor at Oklahoma City Community College from 2005 to December 2011, Sean taught web development and programming courses. Additionally, experience as a freelance web and game developer (2003-2011) and in design roles at Lottridge Advertising Design (2000-2003) and the Oklahoma Press Association (1996-2000) contributed to Sean's diverse skill set. Sean holds a BBA in Marketing from Loyola University Chicago, obtained between 1984 and 1989.