May we evaluate your use of our website to improve our offer and record your interests? More about data protection no Yes GermanEnglish Home pageCompaniesPlant constructionAutomationProcess technologyIndustry specializationProjectsCurrentlyCareerContact Frey Ingenieure - A company of the Stoll Group Our roots and the international orientation For more than 50 years we have been planning and realizing capital goods for well-known customers all over the world as an owner and family-run company in the second generation. Our headquarters are in Martinszell in the Allgäu, our foreign branches in Switzerland and China. A selection of our customers Stoll Group - industry specialist in Automotive Food Data centers Energy infrastructure with innovative solutions in × building technology Elektro Stoll Switchgear construction Elektro Stoll Automation Frey engineers Passig automation technology Energy Technology Stoll energy systems Elektro Stoll Switzerland Plant construction Frey engineers Frey Stoll Trading Process technology Frey engineers Passig automation technology