| 1972 | DI Friedrich W. Spindelberger begins working for the consulting engineering company DI Peter Weeber |
| 1978 | Founding of consulting engineering company DI Friedrich W. Spindelberger |
| 1979 | Founding of HYDRO INGENIEURE Umwelttechnik GmbH |
| 1989 | Setting up of own laboratory for the analysis of potable water and wastewater |
| 1992 | Setting up of the business divisions of Sewer Cleaning and Mobile Sludge Dewatering |
| 1993 | Conversion of former 15th century salt barn to central office building |
| 1994 | Spin-off of WSB Laboratory as an independent company |
| 1997 | Certification according to ISO 9001 quality standard |
| 1998 | Setting up of the business divisions of Underground Infrastructure Cadastre and Cleaning/Rehabilitation |
| 1999 | Commencement of international activities with projects in Bosnia and Herzegovina (BiH) |
| 1999 | Spin-off of Hydro Ingenieure Terracomp GmbH and Hydro Ingenieure Kanaltechnik GmbH as independent companies |
| 2002 | Spin-off of the division of Underground Infrastructure Cadastre as an independent company IM-Tech Infrastrukturmanagement GmbH (formerly KWT GmbH) Setting up of the business divisions of Public and Commercial Construction as well as Electrotechnics |
| 2003 | Setting up of the divisions TGA (Technical Equipment for Buildings) and Energy Management (Alternative Energy) |
| 2004 | Incorporation of sole trader DI W. F. Spindelberger into HYDRO INGENIEURE Umwelttechnik GmbH |
| 2005 | Setting up of the division Process Engineering/Automatization |
| 2006 | Setting up of the division Hydrogeology |
| 2007 | Setting up of the division Energy and Ecology Management |
| 2008 | Setting up of the division Site, Municipal und Regional Development |
| 2009 | Setting up of the division Geotechnics |
