Foundation of the company by Kastor Sonntag with a focus on structural engineering.
History
Development of the SONNTAG Baugesellschaft
1932
1959
Josef Sonntag leads the company and is increasingly focusing on civil engineering, road construction, and engineering.
1964
Establishment of a branch in Bingen.
1983
Move to own business premises in the Bingen-Kempten industrial area on an area of approx. 12,000 m².
1986
First construction site using electronically controlled pipe jacking.
1988
Relocation of the main operation from Gondershausen to the Dörth industrial area. The plot size is approximately 21,000 m². The paved areas are used as a construction yard, workshop, and storage.
1989
Entry into the RKS gravel and chippings works, Eckelsheim.
1990
Environmental protection award for environmentally conscious corporate management.
1991
Foundation of SONNTAG Bau GmbH in Hönow near Berlin.
1996
The managing partners Dipl.-Ing., Dipl.-Wirtsch.-Ing. Bernd Sonntag and Dipl.-Ing. Marion Sonntag lead the SONNTAG group.
2004
SONNTAG takes over a reinforced concrete and prestressed concrete precast plant in Halsenbach and renames it to W + S MONNERJAHN GmbH.
2007
World premiere in Worms! For the first time, a 464 m long pressure pipe is being pushed under the Rhine using the newly developed Direct Pipe® method.
2009
SONNTAG invests in its own rotary drilling rig, a BG 20 with a deployment weight of 70 tons, thus establishing a foothold in specialized deep construction.
2011
Acquisition of another rotary drilling rig with 85 tons of operating weight.
National and international award for the construction of a trenchless air cushion pipe under the Enz and the Nagold, commissioned by the Pforzheim city drainage (ESP).
2014
The new workshop hall at our headquarters in Dörth is completed. The 1,500 sqm large hall with state-of-the-art storage technology will further optimize maintenance and project preparation for pipe jacking.
2015
The Year of the Ducts
SONNTAG successfully completed two massive long-distance drives under the Rhine in Cologne and Bingen in 2015.
2015
The SONNTAG quality and environmental management system has been successfully certified by TÜV according to DIN ISO 9001 and ISO 14001.
2016
Location Bingen - Offices shine in new splendor
The aging premises have been stripped, remodeled, and expanded. A new office space of 240 sqm was created – more offices with more space, a larger meeting room with the latest technology, and an additional archive. The entrance area has also been completely redesigned.
2016
Acquisition of a new frame RG 16 T and expansion of our microtunnelling division through the purchase of a new cutting head AVND 2000 AB and a control container C50.
2017
SONNTAG is investing in two new rotary drilling rigs BG 20 and BG 28 to expand the specialist foundation engineering division.
2018
Acquisition of another large rotary drilling rig LB 36. With this investment, we can strengthen our specialist foundation engineering division again, and the equipment was directly used on our "XL construction site" in Essen Wolfsbachtalsammler.
2018
Mega project in Mannheim – For MVV Energie AG, we successfully constructed a Rhine crossing with an outer diameter of 4.10 m using microtunnelling.
2019
In quiet mourning and full of gratitude, we had to say goodbye to our senior manager Josef Sonntag, who passed away in February 2019. He led the fortunes of the SONNTAG group from 1959 to 1996 with foresight and great courage, and promoted our good reputation as an innovative construction company with great enthusiasm.
With great dismay, we also had to say goodbye in September to our highly esteemed senior manager, Trudi Sonntag. Together with her husband, Josef Sonntag, she built the SONNTAG group with diligence, foresight, passion, and tolerance over decades. She was a wonderful woman and an extraordinary personality, a person with a big heart for the family and for the company.
They will both remain unforgettable to us.
2019
SONNTAG has been successfully certified for the area of occupational safety ISO 45001 and SCC** since November 2019.
2020
Further certification in the field of occupational safety – SONNTAG has been successfully certified for occupational safety “SCL” – Step 3 since February 2020.
2021
New rotary drilling rig in the SONNTAG machine fleet: LIEBHERR LB 35 with a torque of 350 kNm and equipment for the double-head drilling method. With a total of 4 machines in the classes of 60 to 120 t, we will thus meet every requirement.
2021
With great dismay and deep sorrow, we had to say goodbye in August to our highly esteemed managing director Bernd Sonntag, who unexpectedly passed away at the age of 61 after a short, severe illness.
Since 1996, Bernd Sonntag, together with his sister Marion, led the SONNTAG group as managing partner with skill and foresight. His charisma, fair and objective manner, and his human approach in all matters, always for the benefit of the entire group, distinguished him and established the high regard and appreciation he enjoyed among our customers, business partners, and employees alike.
Bernd Sonntag successfully led the group and expanded its good reputation as an innovative construction company with great enthusiasm. He demonstrated foresight and courage, consistently bringing the company up to the latest standards of progress and technology. His tireless commitment, combined with an exceptionally high social responsibility for his employees, shaped his life as an entrepreneur. His work will continue to provide important impulses for the SONNTAG group in the future.
With our “boss,” we lose a strong personality whom we liked and respected very much. We are grateful for the time we shared and mourn a wonderful person who will be greatly missed by us.
2022
Robert Himmel strengthens management of the SONNTAG Group
From January 2022, a leadership duo will again be at the helm of the SONNTAG Group. Mr. Robert Himmel (M. Sc.) has joined the management and is leading the company together with his mother, Dipl.-Ing. Marion Sonntag.
After completing his master's degree at the Technical University of Braunschweig in the field of business and civil engineering, Robert Himmel worked for a large medium-sized construction company in specialist foundation engineering, microtunneling, and tunnel construction.
In his new leadership position at SONNTAG, he takes on the technical part of the management. Marion Sonntag continues to be responsible for commercial management. Together, they will build on what has been achieved so far and ensure continuity in the SONNTAG Group.
2022
Extension Office Building Dörth
Our company is growing, and so is the demand for office space. Therefore, we have expanded the office building at the Dörth location. The extension was designed according to the latest state of technology. Our special focus was not only on the functionality of the architecture but also on the energy efficiency of the building.
2023
New workshop hall and more storage space
A new XXL hall has been built on the premises of our headquarters in Dörth. 37 precast columns support a roof up to 9 m high, spanning 2,000 sqm of warehouse, 1,200 sqm of enclosed hall, and 500 sqm of outdoor storage. Our high-quality construction equipment and tunneling accessories now have ample space in the dry, and the new 50-ton overhead crane facilitates logistics. Additionally, 15,000 sqm of extra space has been created in the outdoor area for maintaining our machinery fleet and storing building materials.
2024
Charlotte Hermes strengthens management of the SONNTAG Group
Since January 2024, Charlotte Hermes has joined the management of the SONNTAG Group as another family member. In the future, the company will be led together as a trio.
Charlotte Hermes completed her legal and business education at the University of Mannheim. After successfully finishing her legal clerkship at the Darmstadt District Court, she worked as a lawyer in a specialized construction law firm in Frankfurt am Main.
In her new leadership position, she is responsible for the commercial part of the management together with Marion Sonntag and also takes care of internal legal matters. Robert Himmel remains unchanged in charge of the technical area of the SONNTAG Group.
Together, they will build on what has been achieved and ensure the continuity and quality for which our customers and business partners appreciate us.
