History

With over 40 employees, Tretor AG has a strong market position in Northwestern Switzerland and can reflect on its successful history. The company was founded by brothers Gilbert and Philipp Hammel. Since then, the search for entrepreneurial opportunities has characterised the company's thoughts and actions - under a long-term corporate philosophy. The broad-based management ensures and lives this philosophy every day with success.

Milestones in the company's history:
2020: David Klein, Josia Röhm, Martin Dettwiler and Adrian Schaller take over operational management
2015: Merger with Valiba Treuhand AG from Basel. Alexander Biner and Jürg Hamburger join the management team as partners
2011: Move to own building in Liestal with over 2000 m2 of office space 
2007: After many successful years, TRETOR AG takes over Treuhand AG Liestal