Information technology (IT) is a vital source of economic growth across developed and developing countries. Skill gaps are significant barriers to technology adoption by many industries; therefore, this chapter reviews research studies sampling IT professionals to identify a whole gamut of IT professionals' skills and competencies. This systematic literature review comprises of exhaustive search for articles through Scopus database with empirical evidence or theoretical models meant for working IT professionals. Critical analysis of prominent papers is done to bring forth existing research categories (typology) and furnish generic as well as specific skills and competencies. This study attempts to become a resource for integration of IT professional capability research and a comprehensive report for researchers, practitioners, educators, and institutions. Tables containing list of publishing journals, country- and industry-wise article distribution, and prominent paper methodology are provided.