His research areas include alternative cooling technologies, renewable energy, and green buildings. Celik has over 20 journal and conference papers, and technical reports. He received the Outstanding Teacher Award of his department in 2008, 2010, and in 2012. He is a member of the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). He is the founder for the ASHRAE Student Chapter at SIUE. Celik is also a member of the Green Roof Environmental Evaluation Network (G.R.E.E.N.) at SIUE, where he focuses on the energy savings of green buildings during heating and air-conditioning seasons and the enhancement of green roof insulation properties. Other projects of Celik include solar panel cooling, self-adjusting photovoltaic panel systems and solar roofs with thin-film solar shingles.