Prof. Dr.-Ing. Helmut Kramer
| 1971 | Dr.-Ing. Helmut Kramer, starting his activities as a construction engineer in the office at Glockengießerwall Nr.1 |
| 1973 | Partnership of Dr.-Ing. H. Kramer and H. Gütersloh |
| 1985 | Dr.-Ing. Helmut Kramer continues the engineering business on his own |
| 1994 | Dipl.-Ing. Friedhelm Albrecht joins the engineering company as a partner. |
| 2007 | Prof. Dr.-Ing. Helmut Kramer leaves the general management for age reasons |