Aleksey Potemkin was one of 12 Russian GRU officers indicted by the special counsel in July of 2018.
Potemkin was responsible for the administration of the computer infrastructure used in the cyber operations. The infrastructure and social media accounts maintained by Potemkin took part in the release of hacked material through DCLeaks and Guccifor 2.0
All of the indicted individuals worked for the Russian military intelligence agency GRU. They were accused of interfering in the 2016 presidential election by stealing and releasing documents from the DNC and DCCC. The constitution of Russia doesn’t allow the extradition of citizens so it’s unlikely any of these officers will be brought to justice.