Bessa+S was founded back in 2010 and is located in Chalandri, Attiki. It consists of an architectural and engineering team with 50 years of experience in the field. The practice is focused on offering a wide variety of archtectural and engineering services. Our portfolio includes private residences, apartments and offices, commercial properties.

Valuation and real estate development are clearly setting forth the objects of the expertise. The practice is officially certified as an expert valuer by the Ministry of Finance. It also bears the title of Recognised European Valuer by TEGoVA, The European Group of Valuers’ Associations. As an external valuation expert, it consults two out of four Greek systemic banks, Alpha Bank and the National Bank of Greece.

The practice, over the years, has offered million euros valuations in property, plant & equipment, a complete business plan for an industrial park (ΒΙΟΠΑ) in Keratea, Attiki and for the development of mall based multiplex cinemas in Kantza, Pallini, Attica. In the financial sector, the practice is conducting feasibility studies and techno-economic designs. As part of The Intermediary Body EFEPAE National Registry of Evaluators (’12) and the Ministry of Economy National Registry of Certified Inspectors for investment projects, the practice is an independent consultant of the government for the management of State Aids and European funding subsidy programs.

Marianna Makari

Civil Engineer National Technical University of Athens, MSc NTUA

Marianna Makari was born and grew up in Athens, Greece. She studied Civil Engineering in the National Technical University of Athens and completed her undergraduate studies in 2005 with a thesis concerning damage assessment on buildings due to earthquake loads. Her MSc was in “Analysis and Design of Earthquake Resistant Structures” at NTUA (2007) and her diploma thesis  concerned the “Earthquake Behaviour of Elongated Historical Structures”. In 2006-2007, before completing her MSc, she worked for the Laboratory of Structural Analysis and Antiseismic Research of the NTUA on Research Projects concerning the assessment and strengthening of listed buildings. Since her graduation, she has worked as a Civil Engineer focusing in the fields of structural design and building restoration. In 2012, Marianna completed a 1-year Pedagogical Training Programme at the School of Pedagogical and Technological Education in Athens. Since 2013, she has also worked as an educator for private Vocational Training Institutes (IEK). She is married and a mother of two.

Katerina Xenou

Architect Engineer, NTUA

Katerina Xenou was born and grew up in Athens. She studied Architecture at the National Technical University of Athens (2006) and is a registered architect in Greece.

Between 2006 and 2021, she collaborated with “Studio 75 – Architects S.A” and undertook different types of architectural studies including urban regeneration, landscape design, restorations, public service buildings and large scale tourist resorts.

Her work includes participations in architectural competitions where she has been awarded.

Currently, in BESSA+S, her experience in large scale projects, permits her to carry out a wide range of projects, to coordinate various design schemes, to manage construction, to control general cost and to provide specification and procurement lists.

Thanassis Drossos

Surveyor Engineer

Athanasios Drosos was born in 1987, grew up and lives in Athens. He completed his undergraduate degree at the School of Surveying Engineering of the Technological Educational Institute in Athens (2015) with a diploma on the Subject of National Cadastre and Forest Maps. Today, he holds a master’s degree in Digital Mapping of Greece in a GIS programming environment at the Department of Topography and Geoinformatics Engineering of the University of West Attica.

He has worked for the subsidiary company of the OSE group (ERGOSE SA) in Topographical Survey’s developments of the new railway network of Greece. For two consecutive years (2009 – 2011), he worked for a private company in the field of Digital Mapping at the new Telecommunication Network of the OTE group. He has completed his military service in 2011. Since 2017, he has been working for BESSA+S and specialises in projects related to Topographical Surveys and Cadastral Declarations.

Additionally, Athanasios is systematically involved in sports.

Agathi Papakosma

Civil Engineering and Infrastructure Works of the Technological Institute of Patras

Agathi Papakosma has joined BESSA+S since 2020. She is a graduate of Civil Engineering and Infrastructure Works of the Technological Institute of Patras. Her thesis was about the “Opening and Construction of New Road”. Agathi has a broad working experience since she had been working for sixteen consecutive years for Athens-based construction companies.

Ioannis Bessas

Civil Engineer, NTUA (Class of 1974)

Practitioners :

Ioannis Orfanos,

Mary Papamanou,

Collaborators :

Constantine Cosmas, Architect UGREE

Dimitra Gialidi, Civil Engineer NTUA

Chara Sigala, Lighting Architect NTUA, MSc UCL

Foteini Anna Sourmpi, Interior Designer

Peggy Fokianou, Mechanical Engineer, NTUA, MSc