He was employed at the Budapest Transport Company (BKV), where he initially worked as an economist and then became the economic deputy director.

[2] After the end of communism, Ritter actively participated in the emerging national minority self-government.

In 1998 he was elected president of the financial committee of the National Self-Government of Germans in Hungary (MNOÖ) and was re-elected in 2003 and 2007.

In 1998, he was granted a privileged mandate as an independent German minority candidate at the Budaörs representative body, in which he spent a cycle.

[3][4] During his first term as Member of Parliament, Ritter supported the government, voting for the ruling party Fidesz in most cases in the National Assembly.

Ritter also decided to represent the interests of the other twelve "historical" national minorities, which sent advocates to the parliament, but were ineligible to elect their own MP due to fail to reach the lowered preferential quota.