A Rzeszów fire-protection expert practice (rzeczoznawcy ds. zabezpieczeń przeciwpożarowych) run by Kinga and Kamil Styrczula, delivering performance-based fire engineering backed by computer simulation. It runs CFD smoke-and-ventilation modelling in PyroSim and evacuation modelling in Pathfinder to establish safe egress times, alongside technical fire expert assessments, code-equivalency solutions, ATEX explosion-protection documentation and design reviews. Its analyses aid the professional judgement of designers and approving experts rather than replacing it.