Helmut Bierman was the president of Germany (Bundesrepublik Deutschland) before and during the First Tiberium War.
As the leader of an important GDI-friendly nation, Bierman was considered in danger of being attacked by the Brotherhood of Nod. One of Berlin's most famous landmarks, the Brandenburg Gate, was a potential Nod target. Bierman was at London when Nod decided to destroy a landmark of a GDI-friendly nation.
He is mentioned in the Nod ending of Tiberian Dawn.