The Stertil-Group is part of Citadel Enterprises. Citadel Enterprises is the strong foundation of the organisation for a group of technical companies. The individual companies supply and manufacture technical machines, parts, installations and tooling systems.

Citadel Enterprises prides itself on being a committed and personal organisation. They see their company as the spindle around which all our operations revolve. The companies of Citadel Enterprises are the spokes. Together, we form a strong and well-oiled wheel. Besides its strength, Citadel Enterprises stands for innovation and the creation and perfection of brands.