Klaus Westerwell

Siepmann-Werke GmbH & Co. KG is a German company based in Warstein, Germany, with subsidiaries in Germany. With 125 years of experience, the private company develops, manufactures, and markets customer-specific product solutions made of steel. The company is professionals in the forge, heat treatment, metallurgy, chip lifting, assembly, and welding process. The company's subsidiary, Persta Stahl Fittings, is a worldwide-known brand that stands for high-quality industrial fittings. With an annual turnover of around 85 million euros, around 450 employees, and sales partnerships around the world, they are among the market leaders in general mechanical engineering. The company's core competencies include welding technology, gear components, and raw material funding. The company's products are used in various industries, including power plants, construction, wind turbines, production, rail, and water transportation. The company was founded in 2019, and its CEO is Korinna Schwittay.

SZ Fertigungstechnik GmbH is a German company that manufactures valve products. The private company is based in Olfen, Germany. The CEOs of the company are Korinna Schwittay, Klaus Westerwell.