State Organizations
- World Bank
- European Investment Bank
- Joint Assistance to Support Projects in European Regions (JASPERS)
- Ministry of Environment and Water BULGARIA
- Ministry of Environment ROMANIA
- Ministry of Finance ROMANIA
- Greek Ministry of Environment, Energy and Climate Change
- Greek Ministry of Development
- Greek Ministry of Rural Development and Food
- Greek Ministry of Labour and Social Assurance
- Greek Ministry of Health and Welfare
- Greek Ministry of Development - General Secretariat for Research and Technology
- Greek Ministry of Economy and Econοmics
- Ministry of Agriculture, Natural Resources and Environment -Cyprus / Department of Enviroment
- Ministry of Interior / Cyprus
- Association of Communities and Municipalities of Attica Region
- Attika Region
- Region of Western Greece
- Central Macedonia Region
- Peloponnese Region
- Sterea Ellada Region
- Hellenic Company for the supporting of Local Authorities (E.E.T.A.A.)
- Developing Co. of Western Thessalia S.A.
- Developing Co. of Cyclades S.A.
- Developing Co. of Pella S.A.
- Institute of continuous further education of the National Centre of Public Administration (E.K.D.A.)
- Hellenic Industrial Bank (ETBA)
- Technical Chamber of Greece
- Centre of Renewable Energy Sources (CRES)
- Athens Innovation Centre
- National Technical University of Athens (N.T.U.A.)
- National University of Athens
- Agricultural University of Athens
- Greek Chemical Engineers Association
- Greek Chemists Association
- Greek Physicians Association
- Epirous Region
Local Authorities
- Development Association of Trizinia
- DEYA Kilkis
- Municipality of Aegina
- Municipality of Aigina / Aigina Island
- Municipality of Ano Liossia / Athens
- Municipality of Ano Siros
- Municipality of Argos / Peloponnese
- SW Selino Association / Chania / Crete Island
- Municipality of Archanes / Crete Island
- Municipality of Vianou
- Municipality of North Kinouria
- Municipality of Giannitsa
- Municipality of Gorgolainis
- Municipality of Gythio / Peloponnese
- Municipality of Igoumenitsa
- Municipality of Igoumenitsa / Ipiros
- Municipality of Thiva
- Municipality of Kalamata / Peloponnese
- Municipality of Karditsa / Thessalia
- Municipality of Karpathos
- Municipality of Karpenisi
- Municipality of Katerini
- Municipality of Kea
- Community of Marpissa Paros / Cyclades Islands
- Community of Naoussa Paros / Cyclades Islands
- Municipality of Kos / Kos Island
- Municipality of Lamia
- Municipality of Livadia
- Municipality of Lipsi / Dodecanese
- Municipality of Leonidio / Peloponnese
- Municipality of Leonidio / Peloponnese
- Municipality of Molai / Peloponnese
- Municipality of N. Psychiko / Athens
- Municipality of Naxos Island / Cyclades
- Municipality of Areopoli / Peloponnese
- Municipality of Nea Michaniona / Thessaloniki
- Municipality of Papagou / Athens
- Municipality of Pafos / Cyprus
- Municipality of Poros / Áttica
- Municipality of Pylos / Peloponnese
- Municipality of Rethymno / Crete Island
- Municipality of Rodos / Rodos Island
- Municipality of Serifos
- Municipality of Sparti / Peloponnese
- Municipality of Spetses, Pref. Of Piraeus
- Municipality of Tropeon
- Municipality of Timpaki
- Municipality of Chalkis / Evia Island
- Municipality of Chania / Crete Island
- Municipality of Chrissochou / Cyprus
- Municipality of Zaraka
- Municipality of Ámari / Crete Island
- Intermunicipal Waste Management and Environmental Development Association of Lesvos
- Egnatia Odos S.A.
- National Railway Infrastructure Manager S.A.
- Hellenic Agency for Local Development and Local Government S.A.
- Intermunicipal Solid Waste Management Association of Messinia County
- ESDAK
- Municipality of Corfu / Corfu Island
- Municipality of Kithira / Attica
- Municipality of Nauplio / Peloponnese
- Prefecture of Athina – Piraeus
- Prefecture of Arkadia
- Prefecture of Evia
- Prefecture of Evritanea
- Prefecture of Helia
- Prefecture of Karditsa
- Prefecture of Cyclades
- Prefecture of Lakonia
- Prefecture of Lesvos
- Prefecture of Messinia
- Prefecture of Peraeus
- Prefecture of Pella
- Prefecture of Pieria
- Prefecture of Trikala
- Prefecture of Halkidiki
- Prefecture of Chania
- Prefecture of Chios
- Hellenic Railways Organisation S.A. (OSE S.A.)
- Eastern Greece - Thrace Region / Regional Development Office
- Intermunicipal Association of Sivtitos & Kourites
- Waste Management Association of Volos Municipality
- Intermunicipal Solid Waste Management Association of Lakonia County
- Waste Management Association of Almopia - Pella
- Intermunicipal Waste Management and Environmental Protection Association of Kerkyra
- National Marine Park of Zakynthos Management Agency
Private Companies
- A. KAOUSIS S.A.
- AGRICULTURAL ASSOCIATION of SKALA / Lakonia
- AGRICULTURAL ASSOCIATION of SPARTI / Lakonia
- AKLIMON S.A.
- AKTOR S.A. (Construction Firm)
- ALPHA S.A. (Construction Firm)
- ALTEK S.A.
- ARKTOS S.A.
- ARVIS S.A.
- ASTIR S.A. (Textile and Plastic Industry)
- BATSAKI Co. (Construction Materials)
- BOUGOUES T.P. (Construction Firm)
- CAMEL S.A. Industry of Polishing and Vanishes Polish
- CHALYPS S.A., Cement IndustryAKTOR S.A. (Construction Firm)
- CM ATEDK (Construction Firm)
- COVED, (Construction Firm)
- DEPANOM CONSORTIUM INSO SpA
- DOMIKI KRITIS S.A., (Construction Firm)
- DOMOSTATIKI S.A.
- EFKTITOS S.A.
- ELECTROMEC S.A.
- ELKAT S.A.
- EMAAR REAL ESTATE INVESTMENTS LTD
- ENVIPROSYSTEM S.A (Construction Firm)
- ENVIRONMENTAL ENGINEERING S.A.
- ENVITEC S.A. (Construction Firm)
- ERGASIS ENERGEIAKI S.A.
- ERGASSIS S.A. (Contruction Firm)
- ERGODOMI S.A.
- ERGOMARE S.A.
- ETEM S.A. , Industry of Aluminium Process
- ETETH S.A.(Construction Firm)
- EURIPOS S.A.vEUROAXESS S.A.
- EUROGREEN Ltd – Processing Unit of Agricultural Products
- EUROKAT S.A. (Construction Firm)
- G. PETRIS S.A.
- GNOMON S.A. (Construction Firm)
- HELECTOR S.A.
- HELESI - HELLENIC INDUSTRY OF ENVIRONMENTAL SYSTEMS
- HELLAFARM S.A. (Agrochemicals production)
- HELLECTOR S.A. (Construction Firm)
- HELLENIC HALYVOURGIA S.A.
- HELLENIC STEEL INDUSTRY S.A.
- HOTEL CLUB LOUTRAKI – CASINO S.A.
- I. TROUVAS
- IDEAL STANDARD S.A. (Manufacturing of Sanitary ware)
- JP & AVAX S.A. (Construction Firm)
- K. KOSTOULAS Industrial and Commercial S.A.
- K. KOSTOULAS S.A. Solid Waste Management & Recycling Company
- KARKANIAS Ltd (Construction Firm)
- KLEMAT GEOTECHNICS S.A.
- KORONIS S.A.
- LAMDA TECHNIKI S.A.
- LIATAKI & Sons Co. (Construction Materials)
- MARMI S.A.
- MESOGEIOS Technical and Trading Limited Company
- MESSOCHORITI BROSS S.A. (Construction Firm)
- OKTANA S.A.
- ORION S.A. (Construction Firm)
- PEGASUS S.A. (Printing and Publishing Co.)
- PERIVALLONTIKI Co. Ltd (Environmental Equipment)
- S & B INDUSTRIAL MINERALS S.A.
- SECIT
- SOYA S.A. (Soya Production and Process Ing.)
- TECHNER S.A.
- TECHNIKI KRITIS S.A. (Construction Firm)
- TETHRON S.A.
- THEMELIODOMI S.A. (Construction Firm)
- THETA INTERKAT S.A. (Construction Firm)
- TOMI S.A. - G. BOUBOYKAS
- TOMI S.A. (Construction Firm)
- TRIAMATAKIS S.A.
- UEG HELLAS S.A.
- VITA TRITI S.A.
- ΕDRACO S.A.