Stefan Lehner (former Gruber) joined KWR as an associate in 2017 and was promoted to attorney at law in 2022. He studied at the Vienna University of Economics and Business Administration and at DePaul University in Chicago. In 2016, he completed his master's degree in business law at the Vienna University of Economics and Business Administration with excellent results. Before starting his career at KWR, Stefan Lehner completed an internship at STRABAG AG in the contract management department and subsequently became a research assistant in the same department. In 2017, he completed a court internship in Vienna and passed the bar exam in 2020 with excellent results.