In 2016, Alexander founded the company ENPULSION, dedicated to the commercialization of the IFM Nano Thruster. He is also leading the Department of Aerospace Engineering at FOTEC which consists of 17 scientists and engineers dedicated to the development of new innovative space-related technologies. His group focuses on chemical and electrical propulsion systems as well as energy systems for satellites and space probes.

Alexander Reissner has been appointed to be the General Chair of the International Electric Propulsion Conference (IEPC) 2019, that will take place in Vienna. He started his career in the space business with RUAG Space, working in Thermal Hardware and later in Mechanical Engineering on projects like Sentinel or Bepi Colombo. He then joined the Austrian Institute of Technology and became the Team Leader for Electric Propulsion Systems. In 2013, he became the head of the department shortly after it was moved to FOTEC.

His education took him from a Dipl.Ing. (MSc) in Physics at the Technical University of Vienna to the Korean Advanced Institute of Science and Technology (KAIST) in South Korea where he started a PhD program in Aerospace Engineering. He then followed his supervisor to the Technical University of Dresden where he finished his PhD Program.