Our highly qualified staff, continuous investment in knowledge and experience, ensure the quality of our services

We Create Buildings with Focus on People

3NK Consulting Engineers is a Greek Company with the aim to provide construction and technical consultancy services in the field of design, planning, and management of buildings. Our goal is to consolidate our presence in the domestic market as a reliable provider of high-quality services, regardless of project’s scale.


Our Values

  • priority to customer needs,
  • scientific excellence and experience,
  • investment in human capital,
  • trusting relationships with customers,
  • entrepreneurial inventiveness,
  • corporate social responsibility,


We are a team of qualified professionals, Engineers, with postgraduate studies in Greece and abroad.



Nikolaos K. Giannoulis

Civil Engineer NTUA, MSc.

Ιs head of energy-saving projects and property management. He specializes in providing services for the development and management of commercial and residential properties. He has collaborated with the NTUA in several research programs in Greece and the EU, and for many years with one of the largest technical consultancies in Greece for major infrastructure projects. He has also worked with Greek and foreign companies, and banks.

Konstantinos A. Kiamos

Civil Engineer NTUA, M.Sc. Construction Econ. & Management, U.C.L.

He is responsible for the design and management of building projects. At the same time, he undertakes building technical assessments and evaluations as a certified real estate appraiser registered within the Ministry of Finance. He served for several years as a member of research teams of NTUA but also as a design group member on major infrastructure projects in Greece and abroad .



Nikolaos K. Malapetsas

Civil Engineer NTUA

He is head of construction of building projects, and director in a affiliate public works construction company. His experience includes, among others, cooperation with major local construction companies on private and public building projects as a project engineer and successful execution of a significant number of construction projects. He has served for several years as technical advisor for the Ministry of Education and the Ministry of Health and Welfare.

Nikolaos S. Zoganas

Electrical and Computer Engineer NTUA, MBA

He is responsible for design and application of electro-mechanical installations and specializes in energy efficiency. He has worked in the field of energy and renewable sources with leading companies in the industry, among which the Public Power Corporation and Greek Petroleum, where he was responsible for the implementation of energy projects investments. He cooperates with OTE where he has served as chief designer for telecommunications infrastructure facilities & Data Centers.




Evi Ch. Stylianidi

Civil Engineer NTUA, MSc

Valia I. Gatsiou

Architect Engineer U.Th.


Maria K. Malapetsa

Architect Engineer NTUA, MSc


Maria Th. Kafkoula

Electrical Engineer


Our 10-year path through steadily upward steps brings us the healthy development with strong foundations for the future.

  • 2005

    Founders personal practices cooperate for the first time.

  • 2006

    An electrical engineer joins the team.

  • 2007

    The team operates under a joint name for a first time.

  • 2010

    N. Giannoulis – K. Kiamos – N. Malapetsas G.P. is founded based in Athens city center.

  •  2011

    Established a certified construction company, registered to undertake public building projects.

  • 2011

    The company’s offices moved to Halandri.

  • 2015

    Having significantly enhance our capacity, we plan the steps for future development.




ISO 9001:2008

3NK Consulting Engineers is committed to offering its customers high quality services. The Quality Assurance System applied, meets all safety and quality standards, as provided by European and Greek legislation.

The quality of projects and services provided by the company is certified by ISO 9001: 2008 for building construction, site supervision and construction management, building facilities maintenance services, technical design services and technical consulting services, by TÜV Austria Hellas with numbered certificates 010 150 483, 010 150 571.