Walter Siepmann

Siepmann was elected to serve as councillor of Belecke (today a part of Warstein) in 1940. He was an active member of the Christian Democratic Union of Germany (CDU).

In 1938/39 Siepmann acquired the local mountain Külbe from the Province of Westphalia respectively the local parish in Belecke. The main house Haus Möhnethal or according to other references also called Villa Siepmann has been his main residence since 1939, his youngest two children being born there. Siepmann also owned real estate in Munich, Bavaria.

In 1933 Siepmann married Johanna Luise (née Trebs), known as Hannaliese. She was an educated concert pianist. She hails from on her paternal side from a doctors' family from Marburg on her maternal side from a merchant family from Korbach (Hesse). Her maternal grandfather Heinrich Wilke gained substantial wealth through mining and merchant activities in German South West Africa and Australia. The couple had four children.

Due to the Great Depression the company struggled and had to reduce staffing from 400 (1927) to 140 (1932), only in 1933 the company became a benefactor of the growing Nazi Germany, which needed suppliers for armament orders. Following those economical impacts they grew back very rapidly increasing staff from 143 (1932) to 312 (April 1934). Since 1937 the Siepmann company was the second largest drop forge factory in Germany and one of the most modern in entire Europe. There were 2,000–3,000 employees within the Siepmann companies. Since 1938, the company has been known as Siepmann-Werke, Inh. Hugo und Emil Siepmann & Söhne OHG (en. Siepmann-Works, Prop. Hugo and Emil Siepmann & Sons). In the 1940s it became a stock corporation, but was later turned back into a GmbH & Co KG. In 1946, they formed the subsidiary PERSTA Steel Fixtures GmbH & Co KG and the third generation entered management of the company.

Siepmann completed his schooling years in Warstein, Lippstadt and Hagen. After completing his Abitur, he studied mechanical engineering at the Technical University of Darmstadt graduating in 1926. He and his elder brother started to become active in the Siepmann company in 1922, respectively 1926. His brother previously lived and worked in Berlin.

Richard Rudolf Walter Siepmann known as Walter Siepmann, Sr. (March 11, 1902 – December 16, 1985) was a German industrialist, engineer and inventor. He was the youngest son of Hugo Siepmann and prominent member of the Siepmann family. He was the majority owner of Siepmann Group as well as a board member of Commerzbank and board director of the Mechanical Engineering Industry Association (VDMA). Since 1940 he served as a councillor of Belecke (Warstein) for the Christian Democratic Union (CDU).

Walter Siepmann was born March 11, 1902, in Warstein, Kingdom of Prussia, the youngest of three children of industrialist Hugo Siepmann and Luise Emilie Johanna Lämmerhirt. His mother was a daughter of Alfred Lämmerhirt, who founded the predecessor company of Westfalia Dinnendahl Gröppel in 1872. He grew-up on his fathers estate located at Hauptstrasse 145 in Warstein, close to his cousins, which also lived on the property and would later engage in business activities with him in the family conglomerate.