His research interests include experimental fluid mechanics, measurement science, and engineering education. He oversees undergraduate laboratories in fluid mechanics, fluid dynamics, and heat transfer. Pedagogically, Dr. Johnson employs active learning, inquiry-based laboratory instruction, and any initiative that empowers students to do hands-on learning. Additional service interests include teaching and leadership training for graduate students, enhancing communication education for undergraduate engineering students, developing evidence-based design project team formation strategies, and improving engineering design curricula.