Over 30 years of commitment to delivering water & environment solutions worldwide

Mission & Vision

Z&A's vision is to become Europe's most renowned Greek company in the fields of consulting engineering, environmental technology and water management. In order to achieve this objective, our core values are Specialization, Integrity, and Excellence.

Our partners implement these values everyday in how they work together, stay true to their mission, and pursue the company's vision. These core values represent the firm's commitment to, and continuation of, the principles which have evolved since the founding of the firm.

cOUNTRIES sITE wHITE

What we do

Water Supply-Water Distribution Networks
Water Resources Management
Irrigation
Water Sewage networks
Storm water networks and Flood prevention
Dams & Hydropower
Non Revenue Water Projects

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Featured Projects

CONSTRUCTION SUPERVISION OF THE MWOMBOSHI DAM AND PREPARATION OF DAM SAFETY PLANS

The overall objective of the assignment is the supervision of the construction works for the Mwomboshi Dam and appurtenant structures in accordance with the International Federation of Consulting Engineers (FIDIC) Conditions of Contract.

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KARNATAKA URBAN WATER SUPPLY MODERNIZATION PROJECT (KUWSMP)

The overall objective of the project is a Cost Effective and Sustainable Up-scaling of Continuous (24x7) Pressured Water Supply, its Operation and Management in Hubbali – Dharwad City of Karnataka in India. The client is Karnataka Urban Infrastructure Development & Finance Corporation (KUIDFC) with World Bank's co-funding.

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CONSULTING SERVICES FOR FEASIBILITY STUDY, DETAILED DESIGN AND TENDER DOCUMENT PREPARATION FOR SIO-SANGO IRRIGATION DEVELOPMENT AND WATERSHED MANAGEMENT PROJECT (KENYA)

The objective of the assignment is to carry out feasibility studies, detailed designs and tender documentation for the following infrastructure:

1) Sio-Sango dam (with connected small hydropower facilities). The characteristics of the dam are:

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DAM AND IRRIGATION SITES FINAL DESIGN OF 4 SITES FOR LAND HUSBANDRY WATER HARVESTING AND HILLSIDES IRRIGATION (LWH) PROJECT (RWANDA)

The main project's component was the detail feasibility study of the dams and supplemental irrigation infrastructure necessary for hillside irrigation at four sites (Nyanza-23 Karongi-12, Karongi-13 and Gatsibo-8). For each dam and irrigation sites, the study included review of existing designs and studies, field visits and geotechnical investigations, detailed design of dams and irrigation networks, preparation of tender documents, design workshops with the Service and the Panel of Experts and dam safety calculations

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CONSULTANCY SERVICES FOR NRW REDUCTION, HYDRAULIC MODELLING AND GIS DEVELOPMENT (ETHIOPIA)

The scope of this project is the development of a coherent framework of principles and practices, established in international practice, for achieving the overall goal set by the Client and defined as reducing AAWSA’s overall Non-Revenue Water (NRW) from a current level of about 36% to 40% to a level of 20% by the year 2020. Addis Ababa and its surrounding areas has currently population estimated at about 3.5 million inhabitants. The total pressurized water network length is 3,700 Km.

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WATER SUPPLY STUDY AND DESIGN, AWARENESS CREATION AND CATCHMENT REHABILITATION FOR GEFFERSA, LEGEDADI AND DIRE CATCHMENT AREAS IN ETHIOPIA

The consultant's scope of service is mainly divided into 6 components. These include: 1) Review of the master plan of the catchments, 2) Identification of stakeholders and clearly show the positive and negative impacts of the project on the stakeholders,

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Our business model is based on simplicity and client focus, where the idea is that it should be easy for clients to do business with Z&A.

News & Events

27-03-2024
CONSULTANCY SERVICES FOR DETAILED DESIGNS AND CONSTRUCTION SUPERVISION OF BLANTYRE WATER SUPPLY NETWORK UPGRADES
February 2024

Z&A as the leading firm of a J/V signed a new Water Supply related contract in Malawi. The consulting services include detailed designs and construction supervision of Blantyre Water Supply network upgrades. The Consultancy assignment shall be conducted in two phases: Phase 1–detailed design and tender documentation; and Phase 2–construction supervision and DMA establishment and commissioning.
The assignment shall be completed within a period of Fifty- Eight (58) calendar months.

Phase 1 of the consultancy assignment is expected to be conducted over a period of Ten (10) months and Phase 2 over a period of 48 months ths includes 12 months’ defects liability period)

Below the photo of Overview map of the Blantyre main water assets.

The 3 intakes and Water Treatment Plants are:
• Walkers Ferry intake on the Shire River and WTP.
• Mudi Dam intake and WTP
• Lokhubula River intake and Nguludi WTP

[more]
15-01-2024
CONSTRUCTION SUPERVISION OF THE WORKS AT THE EIGHT (08) DAMS AND PREPARATION OF OPERATION AND MAINTENANCE PLANS
January 2024

The Services to be provided by Z&A are organized in two part: Review the designs and ensure compliance with the technical specification and design solution of the works implemented by the contractor - Supervision of construction works and implementation of safeguard measures - Training activities for stakeholders such as dam committees and district local staff.
[more]
20-12-2023
Postgraduate program "Management of Infrastructure and Construction Projects"- National Technical University of Athens - Greece
DECEMBER 2023

Z&A was invited and did a presentation as part of the postgraduate program "Management of Infrastructure and Construction Projects" that was launched thanks to the partnership between the National Technical University of Athens - School of Civil Engineering and the GEK TERNA Group, which will finance the program for five years with half a million euros.
The MSc Program aims at the specialization of young engineers in the administration and management of infrastructure and construction projects, with the use of new technologies, in further analysing the modern scientific concepts and implementation of techniques related to all stages of the projects' life cycle

[more]
29-11-2023
PROVISION OF CONSULTING SERVICES FOR THE SUPERVISION OF THE CONSTRUCTION OF THE KAMMITSI AND ARCHANGELOS DAM

The construction of the Kammitsi Dam (29,95 m height (from foundation), and Reservoir Capacity of 1.050.000 m3) in Cyprus continues. A visit by Z&A's Executive Director Mr Panos Antonaropoulos and Z&A's Technical Director Mr Aris Bakalis has taken place today to meet with the rest of Z&A's resident engineers and view real time the progress of works. Z&A is working closely with the client and the constructor for the successful completion of the project following Z&A’s core values Specialization, Integrity, and Excellence.

[more]
28-11-2023
PROVISION OF ADVISORY SERVICES FOR CONSTRUCTION OF THE WASTEWATER COLLECTION NETWORK AND THE WASTEWATER TREATMENT STATION IN THE CITY OF CHRYSOCHOUS
Following the signing of the contract the assigment has now started. The first meeting and field visit took place on the 28^th of November.

[more]
14-11-2023
PROVISION OF ADVISORY SERVICES FOR CONSTRUCTION OF THE WASTEWATER COLLECTION NETWORK AND THE WASTEWATER TREATMENT STATION IN THE CITY OF CHRYSOCHOUS
November 2023 New Contract was signed by Z&A's Executive Director, Mr Panos Antonaropoulos, as the leading company of a J/V in Cyprus regarding the The Wastewater Collection Network And The Wastewater Treatment Station In The City Of Chrysochous. The photos that follow are from the date of signing the new contract

[more]
07-11-2023
CONSULTANCY SERVICES FOR FEASIBILITY STUDIES FOR AMAGORO IRRIGATION SCHEME IN TORORO DISTRICT
On the 7^th of November 2023 a successful completion of a workshop took place in Uganda. Photos are from the workshop with Mr Panos Antonaropoulos Executive Director of Z&A and Prof Michael Kavvadas the Geotechnical Expert of the Study.

Mr Panos Antonaropoulos

Prof Micahel Kavvadas

Following the succesfull workshop; on the 8^th of November 2023, a Dam training session for junior engineers of MWE Uganda was held. In the photo that follows we can see both Mr Antonaropoulos and Prof Kavvadas on the day of the training

[more]
27-10-2023
E.U. DIRECTIVE 2000/60. 2ND REVISION OF RIVER BASIN MANAGEMENT PLANS OF THE 14 WATER DIVISIONS OF THE COUNTRY
Ζ&A as leader of a J/V, in line with the requirements of the Framework Directive 2000/60/EC (Article 14) organised the public consultation in two different towns (Patras 20 Oct 2023, Kalamata 26 Oct 2023) under the project 2ND REVISION OF RIVER BASIN MANAGEMENT PLANS OF THE 14 WATER DIVISIONS OF THE COUNTRY. Two more meetings will be held . The first one in Corfu (02 Nov 2023) and the second one in Nafplio (10 Nov 2023).

Z&A was represented by Mr Panos Antonaropoulos (Coordinator-Team Leader), Mrs Irene Sakellari (Hydrologist) and Mr Ioannis Katsaros (Hydrogeologist)

On the right: Mr Panos Antonaropoulos

On the right: Mrs Irene Sakellari
[more]
15-09-2023
PROVISION OF DESIGN CONSULTANT SERVICES FOR (A) ADDITIONAL AND NEW STUDIES, (B) PREPARATION OF TENDER DOCUMENTS FOR THE ANNOUNCEMENT OF TENDERS, (C) EVALUATION OF BIDS, (D) SUPERVISION OF THE CONSTRUCTION WORKS OF THE SEWAGE SYSTEM IN GOVERNMENT SETTLEME
On the 15th of September 2023 Z&A attended the Contract Signing Ceremony of the Contractor for the Construction Phase of the Assigment PROVISION OF DESIGN CONSULTANT SERVICES FOR
(A) ADDITIONAL AND NEW STUDIES, (B) PREPARATION OF TENDER DOCUMENTS FOR THE ANNOUNCEMENT OF TENDERS, (C) EVALUATION OF BIDS, (D) SUPERVISION OF THE CONSTRUCTION WORKS OF THE SEWAGE SYSTEM IN GOVERNMENT SETTLEMENTS AND SELF-HOUSING SETTLEMENTS IN LIMASSOL, (E) SUPERVISION OF WORKS WITHIN THE RESIDENCES. Z&A will be supervising the works.

Mr Aris Bakalis, represented Z&A in the Ceremony
[more]
14-06-2023
New Training & Site visits within the framework of the project SELECTION OF CONSULTING SERVICES FOR NON‐REVENUE WATER REDUCTION STRATEGIC PLAN AND IMPLEMENTATION MECHANISMS & BUSINESS PLAN DEVELOPMENT OF HAWASSA, WOLAITA‐ SODO AND ARBA‐MINCH TOWNS
June 2023. A seven-day training was contacted from the 9th until the 15th of June 2023 in Athens and Patras, Greece by Z&A Consulting Engineers and Roikos Engineering Consultants within the framework of the project ‘’Selection of Consulting Services for Non-Revenue Water Reduction Strategic Plan and Implementation Mechanisms & Business Plan Development of Hawassa, Wolaita- Sodo and Arba-Minch Towns Water Supply and Sewerage Authority’’
Site visits were organised at the EYDAP (the largest company in Greece in the water supply, sewerage and wastewater treatment sector) in Athens and at the DEYAP in Patras City (Patras is Greece's third-largest city and the regional capital of Western Greece).
[more]

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Over 30 years of commitment to delivering water & environment solutions worldwide

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z-a.gr - Bottom info

Mission & Vision

What we do

Featured Projects

Our business model is based on simplicity and client focus, where the idea is that it should be easy for clients to do business with Z&A.

News & Events

CONSULTANCY SERVICES FOR DETAILED DESIGNS AND CONSTRUCTION SUPERVISION OF BLANTYRE WATER SUPPLY NETWORK UPGRADES

CONSTRUCTION SUPERVISION OF THE WORKS AT THE EIGHT (08) DAMS AND PREPARATION OF OPERATION AND MAINTENANCE PLANS

Postgraduate program "Management of Infrastructure and Construction Projects"- National Technical University of Athens - Greece

PROVISION OF CONSULTING SERVICES FOR THE SUPERVISION OF THE CONSTRUCTION OF THE KAMMITSI AND ARCHANGELOS DAM

PROVISION OF ADVISORY SERVICES FOR CONSTRUCTION OF THE WASTEWATER COLLECTION NETWORK AND THE WASTEWATER TREATMENT STATION IN THE CITY OF CHRYSOCHOUS

PROVISION OF ADVISORY SERVICES FOR CONSTRUCTION OF THE WASTEWATER COLLECTION NETWORK AND THE WASTEWATER TREATMENT STATION IN THE CITY OF CHRYSOCHOUS

CONSULTANCY SERVICES FOR FEASIBILITY STUDIES FOR AMAGORO IRRIGATION SCHEME IN TORORO DISTRICT

E.U. DIRECTIVE 2000/60. 2ND REVISION OF RIVER BASIN MANAGEMENT PLANS OF THE 14 WATER DIVISIONS OF THE COUNTRY

PROVISION OF DESIGN CONSULTANT SERVICES FOR (A) ADDITIONAL AND NEW STUDIES, (B) PREPARATION OF TENDER DOCUMENTS FOR THE ANNOUNCEMENT OF TENDERS, (C) EVALUATION OF BIDS, (D) SUPERVISION OF THE CONSTRUCTION WORKS OF THE SEWAGE SYSTEM IN GOVERNMENT SETTLEME

New Training & Site visits within the framework of the project SELECTION OF CONSULTING SERVICES FOR NON‐REVENUE WATER REDUCTION STRATEGIC PLAN AND IMPLEMENTATION MECHANISMS & BUSINESS PLAN DEVELOPMENT OF HAWASSA, WOLAITA‐ SODO AND ARBA‐MINCH TOWNS

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