We are pleased to welcome a new member of the QSAR Lab company, Maciej Stępnik, PhD, DSc MD. Maciej Stępnik is an expert in the field of toxicology, nanotoxicology, safety assessment of nanotechnology products, assessment of health hazards from chemical substances, mechanisms of mutagenic and carcinogenic effects, application of alternative methods in toxicology. Member of the Scientific Committee on Consumer Safety (SCCS) in Luxemburg (Working Group on Cosmetic Ingredients, Working Group on Nanomaterials in Cosmetics, Working Group on Methodology) and the Hearing Expert in the Cross-cutting Working Group on Genotoxicity at the European Food Safety Authority (EFSA). Member of the Interministerial Commission for the Highest Permissible Concentrations and Intensity of Factors Harmful to Health in the Work Environment. Member of the National Ethics Committee for Experiments on Animals (2009-2013). Chairman of the Łódź Branch and member of the General Board of the Polish Toxicological Society (2014-2017). Member of the editorial committee in: International Journal of Occupational Medicine and Environmental Health (IF = 1.541), Nanomaterials (IF 4.324), Editorial Board of Regulatory Toxicology (specialty section of Frontiers in Toxicology). It is a great pleasure to work with you. We are looking forward to driving growth together!