Our Mission

As a long time established German engineering and consulting company, decon international provides a comprehensive package of engineering and advisory services worldwide and accompanies infrastructure projects in the areas of energy, renewables, energy efficiency, water, waste water, and smart cities.

With quality and innovation as the driving factors, the aim is to provide professional expertise on an international level to meet environmental challenges such as climate change and resource scarcity. For a long time, decon international has been serving the demand of public authorities, ministries, supply companies, energy and water utilities, national and international financial institutions/ investors as well as development banks. By prioritizing commitment and impulse partnerships, our greatest concern is to meet all clients’ and stakeholders’ demands.

To further strengthen this approach, decon international is certified by ISO 9001:2015 (quality management), ISO 14001:2015 (environmental management) and ISO 45001:2018 (protection of labor). Our long-standing experience is reflected in the implementation of more than 1500 projects in over 140 countries since 1972.

Our Competencies

With the background of many years of experience and projects, decon international established a team and network to cover the majority of competencies demanded by our clients, such as:

• Feasibility studies and master planning
• Benchmarking analysis, business process engineering
• Capital planning, quality and cost control
• Tender management (procurement)
• Conceptual and technical design
• Financial and economic analysis
• Construction supervision and acceptance testing
• Capacity building (training)
• Policy advise, tariff design, drafting of regulation

In addition, decon international is closely monitoring the market demand in order to fulfill the requirements of our clients to their full satisfaction.

decon international is headquartered in Bad Homburg, close to Frankfurt am Main. It also has a satellite office on the EUREF Campus Berlin, centre of the so-called “energy transition” (“Energiewende”). Our parent company Tilia Group is headquartered in Leipzig, Germany and Paris, France.
Since 1985, decon international has implemented more than 35 projects in the power distribution, renewable energy and wastewater sectors. We have worked in Afghanistan, Bangladesh, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Mongolia, Pakistan, the Philippines, Sri Lanka, Taiwan, Thailand and Vietnam. Our parent company, Tilia Group, has been modernising sanitation and wastewater treatment in Vietnam since 2015.
decon international has implemented over 100 projects in Latin America, starting with an electricity project in Colombia. Since 1975, decon international has completed projects in Argentina, Belize, Bolivia, Brazil, Chile, Costa Rica, Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, the USA and Venezuela. Areas of focus are energy, as well as rural water supply and sanitation. This also includes the related policy advice in these fields. A representative office is located in Managua, Nicaragua.
Since the 1990s, decon international has implemented over 100 projects in the Commonwealth of Independent States. We have worked in Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Moldavia, Russia, Tajikistan, Turkmenistan, Ukraine and Uzbekistan. Sectors of focus have been energy, solid waste, bulk and potable water and wastewater. In energy, we have credentials in generation (particularly, renewables), distribution, efficiency/conservation, as well as capacity building for regulators and policymakers.
Since 1977, decon international has completed almost 100 projects across Africa. We have worked in Angola, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Cape Verde, Congo, Côte d’Ivoire, Ethiopia, Gambia, Ghana, Kenya, Lesotho, Mali, Mozambique, Namibia, Niger, Nigeria, Rwanda, Sierra Leone, South Africa, Tanzania, Togo, Uganda, Zimbabwe and Zambia. Sectors of focus have been rural electrification, energy efficiency/conservation, potable water and sanitation.
Since the 1980s, decon international has completed approximately 100 projects in the Middle East and North Africa (MENA). We have worked in Algeria, Egypt, Iran, Iraq, Israel, Jordan, Lebanon, Libya, Morocco, Palestine, Syria, Tunisia, Turkey and Yemen. Sectors of focus have been renewable energy, wastewater treatment and sanitation. The project office of decon international is located in Beirut, Lebanon.
In 1992, decon international implemented its first project in Albania. Since then, the company has completed projects in Bosnia Herzegovina, Bulgaria, Croatia, Kosovo, Montenegro, North Macedonia, Romania and Serbia. Sectors of focus include district heating, renewable energy, electricity transmission and distribution, energy efficiency/ conservation, wastewater treatment. We have also advised regulators in the water and waste sectors.

decon international is headquartered in Frankfurt am Main, and has satellite offices in Berlin (Germany), Addis Ababa (Ethiopia), Beirut (Lebanon), Ho Chi Minh City (Vietnam), Managua (Nicaragua), Belgrade (Serbia) and Yerevan (Armenia). Our offices and countries in which we have project experience are shown on the left, further project offices are located in Kiev (Ukraine) and Lahore (Pakistan).

Our History

decon international traces back to 1972 and 2004, when its predecessor entities, namely decon (Deutsche Energie-Consult Ingenieurgesellschaft mbH) and MVV Consulting were founded. In 2008 they merged to MVV decon and in 2015, a new subsidiary, decon international GmbH, was formed to emphasize the group’s expanding geographic footprint. In 2016, decon international became part of the Tilia Group.

More about Tilia

Our Team

decon international employs approximately 100 staff, including high-quality experts, permanent employees and associated freelancers from different sectors. The team consists of experts from various technical and engineering disciplines as well as commercial and economic disciplines.

The Management Team comprises of Dr. Ingo Töws (Managing Director), Mr. Bernd Kadel and Mr. Tobias Nentwig (Energy Division) as well as Mr. Heinrich Meindl (Water Division).


The economic success of decon international relies to a great extent on its market reputation and the confidence of its clients. The key element of its market reputation is its corporate culture with a strong commitment to ethical and lawful business conduct.

We are without any reservation committed to combat bribery in all parts of decon international operations and in all aspects of our business. It’s a top priority of decon international business policy to operate compliant to all applicable laws and regulations.

decon international does not tolerate any infringement of laws and regulations within its business activities. This applies to direct and indirect infringements as well as infringements by employees of decon international or infringements by third parties acting on our behalf.

Supplemental internal policies specify the legal requirements and even go further than these as a contribution to our high standard of ethical behavior. The reputation of our Company is substantially affected by the behavior, action and conduct of each individual employee. Inappropriate behavior of just one employee may already inflict significant damage on the Company.