[1] Following his military service with the German Air Force in Manching, Brandl earned a degrees in industrial engineering from the University of Karlsruhe and the Institut National Polytechnique de Grenoble between 1997 and 2003.

In addition to his committee assignments, Brandl has been a member of the German delegation to the Franco-German Parliamentary Assembly since 2019.

[3] In the negotiations to form a Grand Coalition of Chancellor Angela Merkel's Christian Democrats (CDU together with the Bavarian CSU) and the SPD following the 2013 German elections, he was part of the CDU/CSU delegation in the working group on digital policy, led by Dorothee Bär and Brigitte Zypries.

In similar negotiations after the 2017 federal elections, he was part of the same working group, this time led by Bär, Helge Braun and Lars Klingbeil.

Brandl has in the past voted in favor of German participation in United Nations peacekeeping missions as well as in United Nations-mandated European Union peacekeeping missions on the African continent, such as in Somalia – both Operation Atalanta and EUTM Somalia – (2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017), Darfur/Sudan (2010, 2011, 2012, 2013, 2014, 2015 and 2017), South Sudan (2011, 2012, 2013, 2014, 2015 and 2017), Mali (2013, 2014, 2015 and 2017), the Central African Republic (2014) and Liberia (2015).