In 1763, he entered into the service of Count Herman Karl von Keyserling in Königsberg and Saint Petersburg and then in 1765 he became Konzertmeister and Kapellmeister at the court of Peter von Biron in Mitau, Courland.
In 1763, Veichner entered into the service of Count Herman Karl von Keyserling in Königsberg and Saint Petersburg. In 1765 Veichtner became Konzertmeister and Kapellmeister at the court of Peter von Biron in Mitau, Courland.