TBI IN THE MARKET - Strengthen the market position


Main activitiesMarket characteristics/ developmentsMarket areas/clientsCompetences of TBI companies in the market
  • Design, build, maintain and operate
  • Sustainable energy techniques/ energy monitoring
  • Technical and industrial automation and computerisation
  • Purification systems
  • Panel building
  • Data centre construction/renovation
  • Alarm management/detection systems (water/fire)
  • Access control & security systems
  • Process control
  • Healthcare domotics solutions
  • Electrical heat tracing
  • High voltage
  • Heating and cooling technology
  • Survey and inspection
  • Heating, ventilation and air conditioning
  • Electrical drive systems
  • Marine automation systems
  • Shore-side electricity connections
  • Shift to lifecycle approach, more design responsibility and related UAV-GC contract forms and DBFMO financing arrangements
  • More emphasis among clients on value of the quality and performance over the entire lifecycle reflected in shift of responsibilities towards the market
  • More routine maintenance work owing to clients’ focus on their own core business
  • Shift to performance-related maintenance contracts
  • Increased use of intelligent technology steered by internet/web/apps
  • Non-residential buildings
  • Infrastructure
  • Industry
  • Marine & Offshore
  • High quality knowledge of electrical engineering, automation, ICT
  • Specialist in mechanical engineering
  • Intelligent technical solutions in combination with integrated construction concepts
  • Familiar with all contract forms

Intelligence through technology

TBI companies Croonwolter&dros and Eekels Technology perform a wide range of activities on the non-residential, industrial, infrastructure and marine & offshore markets. They have specialised knowledge and expertise in electrical engineering, mechanical engineering, automation and information technology.

They offer clients in a variety of markets solutions that make buildings, structures and systems safer, more sustainable and more intelligent. Intelligent self-thinking and self-learning systems make ships, tunnels, buildings and factories more efficient and effective.


In 2015 TBI decided to pool the technological know-how and expertise of Croon Elektrotechniek with that of Wolter & Dros and merge the two companies into a single, strong technology business operating under the name Croonwolter&dros. Together, they can draw on the knowledge and experience necessary to devise, implement, manage and maintain intelligent systems and integrated solutions that boost the client’s efficiency. Combining their expertise has also produced a more effective and costefficient organisation.

The companies worked on their merger throughout 2016 and brought it to a successful conclusion on 1 January 2017. The house building activities were transferred to Comfort Partners on the same date.2017 is afgerond. Per dezelfde datum zijn de woningbouwactiviteiten ondergebracht bij Comfort Partners.


The non-residential market was again challenging in 2016 and prices remained under pressure. The competition was fierce and opportunities related, as in the previous year, chiefly to the redevelopment of existing properties. Sustainability and functionality were key aspects of the contracts. One engagement Croonwolter&dros won, for example, was to future-proof eight shopping centres for real estate owner Wereldhave. Installations were redesigned in order to cut energy use. For property manager NSI, the company will revitalise 20 buildings in order to reduce their energy consumption by 7% per annum over the next four years. Croonwolter&dros is working with the engineering consultancy Sweco on both projects.

Together with TBI company Timmermans Infratechniek, Croonwolter&dros won a contract awarded by the province of Limburg to renovate Het Gouvernement, the provincial government building in Maastricht. By using the Lean planning method, the company reduced the project’s lead time for each storey from 55 to 36 working days. Since the project as a whole involves 26 building units, each having between one and five storeys, this is a substantial saving. Efficient planning will enable the staff to continue working during the renovation.

The spread of flexiworking is increasing the demand for flexible, functional workplaces. To offer innovative solutions we have to understand how people use a building and what they expect from it. We are therefore making more use of sensor technology.

Sensors in the building record when it is used and monitor the air quality and energy consumption. We use the data to create smart buildings that facilitate all the users’ wishes.

Existing building converted into new head office

J.P. van Eesteren and Croonwolter&dros will thoroughly renovate the MM25 building in Rotterdam in 2017 and transform it into the new head office of the TBI companies Croonwolter&dros, Mobilis and Servicis. To demonstrate that existing buildings are more than suitable for a modern workspace, TBI has deliberately opted to revitalise an existing office block. Sensor technology, modern systems and a partially renewed façade will transform the block into a smart building with a modern and comfortable working climate that has an exceptionally high energy performance (energy label A).


We are increasingly working with BIM on large projects. All relevant information generated throughout the construction process is saved, used and managed in a digital 3D model of the building. The technique is particularly valuable on renovation projects because 3D scans can provide more information on the systems in older buildings than drawings can. Drawings can become obsolete when buildings are renovated, whereas scans can accurately depict complex situations and thus avoid mistakes and speed up the work.

The proton clinic HollandPTC in Delft is an example of a BIM project that was largely planned and prepared in the factory. The clinic is being built jointly by Croonwolter&dros and J.P. van Eesteren. It will treat oncology patients by means of proton therapy as from 2017. To contain the radiation released during the therapy, we are having to build concrete walls that are four metres thick and contain 3.5 km of pipework. By designing the entire project, from engineering to construction, in BIM, we were able to prefabricate the pipe sleeves for the data cables at the factory in Amersfoort more efficiently.

Croonwolter&dros and J.P. van Eesteren are also building the new laboratory of the Westerdijk Fungal Biodiversity Institute in Utrecht. The contract is exceptional in that completely new premises must be built above an existing library. Owing to the complexity and short lead time, this project was worked out entirely in BIM.


More and more clients are concluding long-term attainment contracts for the technical management and maintenance of building systems. The contracts provide assurances on the functionality of the systems.

In 2016, Croonwolter&dros signed an attainment contract for at least five years concerning the mechanical engineering systems, including the heat pump system, of the Aventus vocational school. It also won an attainment contract for the security systems of the new municipal offices in Utrecht. With J.P. van Eesteren, Croonwolter&dros signed an integrated DBM contract (Design, Build & Maintain) for the first phase of a new sustainable passenger terminal at Lelystad Airport. The company will also be responsible for the technical maintenance of the new building until 2033.


Technology is growing in importance on multidisciplinary turnkey infrastructure projects involving tunnels, bridges and locks. Electrical and mechanical systems are becoming interconnected as lighting, security, fire detection, data networks and air conditioning are increasingly being controlled by one central system. The various systems must then be perfectly harmonised with each other.

The clients of such projects increasingly want all the technology, including system maintenance, to be governed by a single contract. Its structured approach and expertise in this area have won Croonwolter&dros many installation and maintenance contracts. In 2016, for example, it was awarded the contract to maintain the Lorentz and Stevin locks in Kornwerderzand.

The widening of the A15 Maasvlakte- Vaanplein was completed in February 2016. For the next 25 years Croonwolter&dros will be responsible for its maintenance. The company also won the contract to maintain the Sluiskil, Scheldt and Velser tunnels. Another project it will carry out with Mobilis is the enlargement of the lock at Eefde with a second chamber. The lock will be fitted with low-energy technical equipment powered by solar panels.

Turnkey solutions for data centres

Data centres are an interesting niche market for Croonwolter&dros. Reliability, security, the right connectivity and energy and climate systems are of critical importance. Croonwolter&dros has a great deal of experience in building and fitting out data centres using the most innovative sustainability techniques, as at the UMCG’s data centre in Groningen. For InterXion the company also carried out the first two phases of the new AMS8 data centre at Schiphol-Rijk in 2016.


Marine & Offshore had a mixed year in 2016. Investments in the oil and gas market were again negligible. Investments in offshore wind farms and ships, however, were higher. Eekels Technology can look back on a good year. Croonwolter&dros and Eekels Technology saw an increase in their contracts to serve supply ships, ferries, cruise ships and yachts. Eekels Technology will supply all the electrical systems for a fast yacht support vessel (Damen Shipyards) and for a fisheries research vessel.

Eekels Technology successfully completed a contract in 2016 to engineer, manufacture and commission the drive panels for two 10,000mt tub mounted cranes for the “SLEIPNIR” crane ship being built for Heerema Offshore Services.

Demand in the Marine & Offshore sector is changing. The pressure to be ‘greener’ is increasing. As a system integrator, Eekels Technology believes there is a future here for hybrid techniques. The company can benefit by applying its expertise in complete electrical drive systems, such as generators, frequency transformers and electromotors. Drive systems are often supplemented with power management systems as part of the total ship automation software.


Both Croonwolter&dros and Eekels Technology are active in the industrial market. Eekels Technology offers electrical engineering and mechanical engineering solutions. In 2016 the company began to enlarge the Eneco Bio Golden Raand (BGR) plant in Delfzijl. In this multidisciplinary project with Eneco and Tebodin, Eekels Technology is responsible for the mechanical, electrical and civil engineering. Along with SAG and Mobilis, Croonwolter&dros won an order as part of the SC&M consortium to renovate 13 high voltage power stations for TenneT. The project consists of a range of engineering and installation jobs and the renovation of the stations’ security and management.

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