Integrative solutions towards urban sustainability
Clean Energy Solutions delivers smart and sustainable energy solutions to clients around the world—from planning to implementation, all in one place.
COMPETENCES
GREEN ECONOMY
RESOURCE EFFICIENCY & CIRCULAR ECONOMY
Environmental & Social Compatibility
SUSTAINABLE BUILDINGS
SUSTAINABLE ENERGY & PLANTS
ABOUT US
Complex projects and tasks demand integrative solutions based on a broad spectrum of experience. This conviction has systematically characterised our method of working. The experts of CES involve all participants and affected parties into the projects, take all boundary conditions into account and address all the possible alternatives. The cooperation with iC group with approx. 850 employees in different disciplines allows CES to offer our clients complete solutions out of one hand.
The company is mainly active in Austria, Germany, Ukraine, the Western Balkan , Central Asia countries and Saudi Arabia supporting or representing IFIs, municipalities and private industries in their initiatives. Further international project experience has been gained in the Caribbean and Western African countries.
SERVICES
VIDEOS
NEWS

CES at GBCI Europe Circle 2025
04.06.2025
From Innovation to Impact: CES at GBCI Europe Circle 2025.
Earlier this month, CES joined over 300 sustainability professionals at GBCI Europe Circle 2025 in Prague — a key…

Repair of critical infrastructure, Ukraine
03.06.2025
Reliable Infrastructure, Step by Step — Progress in Irpin, Ukraine 🏗️
As part of the EU-funded Action “Repair of critical infrastructure, Ukraine”, CES clean energy solutions,

Construction of a new wind power plant in Ukraine
09.04.2025
CES is proud to contribute to Ukraine’s renewable energy sector development. Together with our partners at iC Ukraine, we support…

Innovative Circular Economy Tool
01.04.2025
👉 Exciting news! We are teaming up with the CDP – Austrian Center for Digital Production GmbH to jointly work on an innovative Circular Economy Tool…

Business Summit
12.12.2024
Last week, Velislava Petkova participated in the “Danube Region Business Summit – Stream of Opportunities”, organized by the Austrian Federal Economic Chamber….

ÖGNI Symposium
08.12.2024
🌟Yesterday, Velislava Petkova participated in the first-ever HashtagÖGNI Symposium on Sustainability, held in Hofburg in Vienna….

Future forum Ramsau
08.11.2024
Today CES joins the Zukunftsforum Ramsau am Dachstein, a key event shaping the future of sustainability, ESG, and digital transformation….

BigSolar Prishtina
12.12.2024
🤝Recently, a delegation from Termokos, district heating operator in Pristina, had a site visit in Mürzzuschlag….

Ukraine Business Opportunities
10.11.2024
Andreas Helbl, Velislava Petkova and Irina Omelianenko took part in the Forum “Ukraine Business Opportunities”, held in Vienna on Wednesday, October 2, 2024….
OUR SELECTED PROJECTS
Vienna, Austria – MVA Spittelau Large scale heat pump
Extraction of thermal energy from flue gas of a waste incineration plant feeding generated thermal energy into the district heating network of the city of Vienna. Extraction of thermal energy from…
Tbilisi, Georgia – LEED Certification Radisson Telegraph
The hotel has an approximate gross building area of 24,000m2 with about 184 hotel rooms. Additional to the hotel rooms….
Austria Juice Poland – Robust WWTP Operation for 2021
Compilation of priority measures aiming at a robust operation of 3 Austria Juice WWTPs in Poland. The assignment…
United Kingdom – EBRD: Regional: Support for higher performance technologies through supply chains (Green TFP)
The EBRD aims to link the Bank’s intermediated financing instruments – GEFFs and the Trade Facilitation Programme…
Kazakhstan – EBRD: Pilot GEFF – Facility Consultant
The EBRD aims to further expand its sustainable energy and resources financing in the region in line with GET…
Kiev, Ukraine – Support to Project Implementation Unit at Dragomanov National Pedagogical University
The objective of the consulting assignment was to support the Project Implementation Unit (PIU) established at the University…
Vienna, Austria – Comprehensive pollutant investigation of the former biocentre at the University Centre
For the extensive building complex of the Biozentrum of the University of Vienna at Althanstraße 14, 1090 Vienna…
Kherson, Ukraine - Feasibility Study and Project Implementation Unit Support for Energy Efficiency Improvements in Public Buildings and Street Lighting in the City
The main objective of the assignment was to develop a Feasibility Study, which would enable NEFCO and other donors to structure…
Austria - TAG 1 Gas Pipeline: Supervision of Asbestos Abatement Works
Within the Framework of corrosion protection measures, the asbestos insulation of the…



