Alongside the implementation of the K – 12 program is the ever-fast-changing advancement in the field of information technology. The said advancements greatly affect the quality of education and as well as the effectiveness of the teacher in teaching computer–related subjects in the two added years of senior high school. Since industry professionals were allowed to teach in the senior high school for as long as s/he had a masteral degree with or without the professional teacher license, the study aims to determine the effectiveness of an industry information technology professional in teaching computer-related subjects in the senior high school in terms of the learners’ academic performance.