As a member of the H.E.S.S. group in Tübingen, Heiko has made multiple contributions to the hardware of the telescopes during his PhD thesis. He has been responsible for the monitoring of the optical point spread function of the telescopes for several years and was involved in the alignment of the mirrors and the focus settings of the large CT5 telescope after the installation of the FlashCam camera. Furthermore, he was part of the team that verified the performance of the FlashCam camera after its installation, and has worked on implementing a new analysis for pulsar observations that employs a reduced trigger threshold compared to normal observations.