Paul was raised in Diessen Germany about 60 km. from Munich. He studied goldsmithing as an apprentice at the age of 14, for 3 1/2 years in Munich, with Hanns Rothmüller, a notable jeweler in the industry. Later he attended Kunstschule (Jewelers Trade School) in Munich where he graduated in 1963 as a Master Bench Jeweler and Goldsmith.

Paul Armbruster has been a Jeweler and Goldsmith for 43 years and has been doing business as Paul J. Armbruster - Goldsmiths in Hawaii since 1967.