His work is centered on 2D/3D/4D imaging and virtual/augmented reality applications. He has more than 100 publications in this field. He received his MSc in optical engineering and his PhD in 3D imaging from WUT. His dissertation focused on development of a 3D scanning technique using structured light. He received his habilitation in 3D/4D imaging in 2012. Sitnik is the head of the Virtual Reality Techniques Division and OGX research group.