Air conditioningBuilding technology/ building services (building automation)CleaningHeatingPlant engineeringRemediation worksRenewable energiesSanitaryVentilation
Building technology/ building services (building automation)CleaningGas installationHeatingPlant engineeringRefrigerationRenewable energiesSanitarySolar panelsVentilation
Assembly worksCleaningIndustrial construction and hall buildingPipeline constructionPlant engineeringRemediation worksScaffoldingSteel constructionStructural engineeringUnderground construction