Back in Denmark, he began to work for Edvard Jünger whose company he took over in 1869.
The company was located at Sortedam Dossering (No.
37).
Under his management the company developed into the leading manufacturer of optical, geodetical and nautical instruments in the Nordic countries.
He collaborated with Rasmus Malling-Hansen on the development of the Writing Ball which he also manufactured.
Jürgensen's instruments were noted for their precision.
His customers included the Danish, Norwegian and Swedish armies and navies, Østervold Observatory in Copenhagen and scientists both in Denmark and abroad.
With the growing significance of electricity in lighting in the 1880s, Jürgensen changed the profile of his company which was responsible for many large installations.

The company won a gold medal at the International Exposition of Electricity in Paris in 1991.
Two new partners joined the company and it was converted into an aktieselskab in 1887.
A new section for electric engines was established.
It also moved to larger premises in Møllegade (No.
28).
In 1890, in collaboration with Siemens & Halske, the company signed a contract for the construction of Copenhagen's first central power station in Adelgade.
In the 1900s, the company came into economic difficulties and went bankrupt in 1906.
Back in Denmark, he began to work for Edvard Jünger whose company he took over in 1869. The company was located at Sortedam Dossering (No. 37). Under his management the company developed into the leading manufacturer of optical, geodetical and nautical instruments in the Nordic countries. He collaborated with Rasmus Malling-Hansen on the development of the Writing Ball which he also manufactured. Jürgensen's instruments were noted for their precision. His customers included the Danish, Norwegian and Swedish armies and navies, Østervold Observatory in Copenhagen and scientists both in Denmark and abroad. With the growing significance of electricity in lighting in the 1880s, Jürgensen changed the profile of his company which was responsible for many large installations.
The company won a gold medal at the International Exposition of Electricity in Paris in 1991. Two new partners joined the company and it was converted into an aktieselskab in 1887. A new section for electric engines was established. It also moved to larger premises in Møllegade (No. 28). In 1890, in collaboration with Siemens & Halske, the company signed a contract for the construction of Copenhagen's first central power station in Adelgade. In the 1900s, the company came into economic difficulties and went bankrupt in 1906.
Christopher Peter Jürgensen