Quadrant Consulting Group Members:
Dimitris Potiropoulos
Architect
Managing Partner of «Potiropoulos + Partners» – Executive Board Member of the Group

Dimitris Potiropoulos was born in Athens in 1953. He graduated from the German School of Athens in 1971.

He studied in the Faculty of Architecture at Technische Hochschule Darmstadt with Professors G. Behnisch, H. Striffler and Th. Sieverts. He served as scientific Associate of the Chair of Free Hand Drawing. He was awarded with a special commendation for his project “Residential Proposal on the Historical Center of Reutlingen”. He specialized in Architectural Composition – Special Issues of Building Construction, under Professor Jürgen Bredow. He completed his studies in 1981.

He worked for “Konstantinos Kapsabelis and Collaborators” (1978), “F.G. Reihmer Architekten” (1979), “Prof. Helmut Striffler Architekten” (1980-1981) and “A.N. Tombazis and Associates Architects” (1986-1989) offices. From 1989 he run his own studio while participating in architectural competitions. Since 1989 he runs, in partnership with Liana Nella-Potiropoulou, “Potiropoulos + Partners” office, one of the leading architectural firms in Greece.

He has repeatedly been awarded prizes and has received distinctions in architectural competitions, among which the following: 1st Prize for the Museum of Natural History in Samos, 3rd Prize for the Complex of Technical Chamber of Greece in Maroussi, 2nd Prize for the New Acropolis Museum in collaboration with the Studio Daniel Libeskind, 1st Prize for the rehabilitation and refurbishment of the Listed Building Complex of the Silk-mill ‘Ekmetzoglou’ in Volos, distinction for the Grand Egyptian Museum in Cairo, and many more.

Lectures and publications of his have been published in the Greek and International Press. Some of his projects have been presented in exhibitions in Greece and abroad, among which: “Modern Architecture in Historical Centres”, Darmstadt, 1981 – “Α’ Biennale for Young Greek Architects”, Athens, 1996 – “Β’ Biennale for Young Greek Architects”, Athens, 1998 – “Modern Landscapes. The Greek Architecture in the Decades of 1960 and 1990”, Rotterdam, 1999 – “International Architectural Exhibition”, Belgrade, 2000 – “Pan-Hellenic Exhibition of Architectural Project”, Patra, 2000/2003/2006 – “The shape of Space, 40 years architectural Trends”, Athens, 2008, and many more.

Through his work but also on a theoretical level, Dimitris Potiropoulos has pored over issues of sustainable architecture and sustainable development of the built environment. His lectures and publications concern issues of architectural theory, as well as projects and studies implemented by the office. He is co–founder of the “Hellenic Institute of Architecture” and co-founder/science advisor of the advanced online architectural magazine “Archisearch.gr”. In 2009 he published through “Potamos Editions” the book “Potiropoulos D+L Architects” (ISBN 978-960-6691-37-9), with selected works of the office in the period 1989 to 2009, which is prefaced by Daniel Libeskind and Dimitris Philippides.

Liana Nella-Potiropoulou
Architect
Managing Partner of «Potiropoulos + Partners» – Executive Board Member of the Group

Liana Nella-Potiropoulou was born in Athens in 1959. She studied in the Faculty of Architecture at the National Technical University of Athens (1984) – ‘17th November’ Award (1982-1983). She carried out her Master's Degree Course in “Architectural Synthesis and Theory” at the University of Pennsylvania under Professors T. Mayne, B. Podrecca and R. Rykwert – “Frank Miles” Award (1984). She completed her studies in 1985.

She worked at the office of Professor Pavlos Mylonas (1982-1983) and collaborated with the “Greek Center of Product Design” (1983). She was also a collaborator of the design office “A.N. Tombazis and Associates Architects” (1986-1989). She ran her own studio from 1986 to 1987 while she participated in architectural competitions. From 1989 until present she owns, in partnership with Dimitris Potiropoulos, the “Potiropoulos + Partners” studio.

Many of her projects have been presented in exhibitions both in Greece and abroad, among which: “A’ Biennale for Young Greek Architects”, Athens, 1996 – “B’ Biennale for Greek Young Architects”, Athens, 1998 – “Modern Landscapes – The Greek Architecture in the Decades of 1960 and 1990”, Rotterdam, 1999 – “International Architectural Exhibition”, Belgrade, 2000 – “Pan- Hellenic Exhibition of Architectural Project”, Patra, 2000/2003/2006 – “The Scientific Work of Women Engineers”, Athens, 2008 – “The Shape of Space. 40 years architectural trends”, Athens, 2008, and many more.

She has repeatedly been awarded prizes and has received distinctions in architectural competitions, among which: 1st Prize for the Museum Natural History in Samos, 3rd Prize for the Complex of the Technical Chamber of Greece in Maroussi, 2nd Prize for the New Acropolis Museum, 1st Prize for the rehabilitation and refurbishment of the Scheduled Building Complex of the Silk-mill “Ekmetzoglou” in Volos, distinction for the Grand Egyptian Museum in Cairo, and many more. She was a tutor in the Department of Architecture of the Engineering School of the University of Patra (2000-2001). Publications and lectures of hers elaborate on architectural issues and projects of the Studio. Her projects have been published both by the Greek as well as the International Press.

Makis Drimaropoulos
Architect
Managing Partner of «Μ&Μ Architects» – Executive Board Member of the Group

Makis Drimaropoulos was born in Athens on 11/04/1955.

He graduated from the German School of Athens in 1973 and studied architecture in Darmstadt, Germany from 1973 until 1980. During his studies he served as scientific collaborator of Professor Max Baecher, based on whom he composed his thesis “Cemetery and Crematorium”. He participated in numerous educational trips to Belgium, Switzerland and Italy.

Upon completion of his studies, he did postgraduate studies in Staedelschule “Konzeptionelles Entwerfen” in Frankfurt, close to Professor Peter Cook.

He worked in various offices, such as: "Udo Nieper", "Bartsch Tuerwaechter Weber" and "Philip Holzmann".
He participated in three architectural competitions:

  • In collaboration with the office "Baader & Co" for the modulation of Luetzow Berlin Square
  • In collaboration with the office "Leser" for the Cemetery in Stuttgart
  • In collaboration with Ingo Schultz for an Insurance Company Building

He received commendations in all three.

In 1983 he married architect Monika Graf and in the same year returned to Athens.

They have two children, Teresa and Philippos, who today live and work in Germany. Teresa is a dentist in Frankfurt and Philippos is a naval architect in Rostock.

Since 1985, and after cooperating with many different architectural offices in Athens, he runs in partnership with his wife Monika Graf the firm “M&M Architects”.

He served for 6 years as a board member of the Association of Parents of DPS, holding the position of vice president for 2 years.

He served for 12 years as a board member of the Association of graduates of DPS, holding the position of vice president for 2 years and the position of president for 4 years.

Pavlos Kremezis
Civil Engineer
Managing Partner of «OMETE S.A.» – Executive Board Member of the Group

Pavlos Kremezis graduated from the National Technical University of Athens, School of Civil Engineering in 1971. He then proceeded to work from 1971-1978 as a freelance civil engineer, compiling structural and anti-seismic designs. From 1978 onwards he joined "OMETE S.A."- first in its form as "OMETE Ltd" and from 1989 onwards as "OMETE S.A.", where his primary tasks included the administration of the firm and tendering, as well as the compilation of structural, transportation and underground projects, mostly in the capacity of project leader or multi-disciplinary project coordinator. His field of expertise is reinforced concrete structures. It should be noted that he was a Scientific Collaborator of the Chair of Civil Engineering- National Technical University of Athens-NTUA, Professor S. Angelidis (1974-1980), a Member of the Scientific Committee of the Hellenic Organization for Standardization (ELOT), a member of the Technical Committee 20 for the compilation of specifications regarding concrete, a member of the work group for a Comparative Study of the foreign design codes regarding bearing structures of reinforced concrete- Technical Chamber of Greece, a member of the work group for the compilation of the intervention design code in reinforced concrete and masonry buildings- Organisation of Anti-Seismic Planning and Protection, and a member of the work group for the compilation of the study: "Recommendations for pre-seismic and post-seismic interventions in buildings"- Organisation of Anti-Seismic Planning and Protection.

Pavlos Kremezis is fluent in Greek, English and German. He is a member of the Technical Chamber of Greece, the Greek Association of Civil Engineers, the Hellenic Association of Consulting Firms and ICOMOS.

Georgios Xourafis
Civil Engineer
Managing Partner of «OMETE S.A.» – Executive Board Member of the Group
Georgios Xourafis graduated from the Technical University of Lund (LTH), Sweden - Faculty of Civil Engineering. He completed the studies with specialization in Structural Engineering in 1984. During his studies, he worked at the Ahlsell Steel Profile in Lund – Sweden, as a research Associate in the Production and Quality Control Department, (1981-1985).
He also worked as a freelance Structural Engineer and as an Associate Consultant Engineer at the Αnastasios Κatsikis Ltd – Structural Consulting in Athens - Greece, (1985-1988).
In 1988 he joined the OMETE S.A. - Consulting Engineers in Athens - Greece, as an Associate and later on as a partner. The past 28 years, he has implemented many structural projects in varied fields of expertise, which have been undertaken by OMETE S.A. and has been working, inter alia, as Structural Project Coordinator and as Design Team Manager.
Georgios Xourafis has been qualified and certified by the Greek Committee of Design Engineers and he holds Certification of Class C in category 08, (Structural Design) and in category 10, (Transportation Projects Design).
He is a member of the Technical Chamber of Greece, the Greek Association of Civil Engineers and the Greek Committee of Reinforced Concrete. Besides his native language Greek, he also speaks English and Swedish in a level of professional working proficiency.
George Diamantouros
Mechanical Engineer
Managing Partner of «HM Engineering S.A.» – Executive Board Member of the Group

George Diamantouros was born in Athens on 22/10/1945 and completed his secondary education in the German School in Athens.
He studied in the Department of Mechanical Engineering at Technische Universitaet KARLSRUHE in Germany (1963-1969) and subsequently obtained his license to practice (14 031 RT TEE) and a C-class Design Degree in Category 09 (E/M installations, HM Designer Certificate 6072). He speaks Greek (native), German (excellent), English (fluent) and French (very good).

He is one of the basic founders and board member of the office of Electromechanical Studies “Electromechanical Studies S.A.” - "HM Engineering S.A." and has a professional experience record of 40 years. Amongst his professional duties are the following:

  • Administration of the firm, management of the works and monitoring of the quality of service
  • Allocation of the assigned work to the firm services and to the Departments of Design and/or Supervisions
  • Direction and leadership of the Heads of the Departments of Design, Supervision, Drawing and Secretariat
  • Coordination of the work of all the departments of the firm
  • Writing and Elaboration of the research of departments that require specialized knowledge and experience

Since taking on his role as CEO and Chairman of the Board for the Company “Electromechanical Studies S.A.” - "HM Engineering S.A.", he has also served as:

  • Administrator and major shareholder of the company “G. Diamantouros & Associates Ltd”- Office of Research of Facilities of Works of Private Buildings, (1986-2003)
  • Technical Associate for the monitoring of the research and supervision of all the electromechanical installations in the Hospital Diagnostic and Therapeutic Centre “YGEIA S.A.”
  • Shareholder and administrator of the company for Industrial and Development Studies "Ε.VΙ.Α.Μ. S.A." (1987-1999)
  • Technical Associate (1986-1989), Group Manager and Coordinator of the program ARTEMIS (1983-1986), Plant Manager (1978-1982) and Head of Department of Methods and Times, Installations / Maintaining and Qualitative Control of the company “Greek Arms Industry S.A.” (1973-1978)
  • Plant manager of VIAMAX S.A. (1973-1982)
Dr. Ioannis Vayas
Civil Engineer, Professor in the Department of Civil Engineering – Steel Structures Laboratory of NTUA
Non-Executive Board Member of the Group

Dr. Ioannis Vayas studied Civil Engineering at the National Technical University from which he graduated as an Engineer in 1976. During his studies, he worked at the Department of Harbor Works in Hamburg Port Authority (om-und Hafernbau). After receiving his Diploma, he worked as Scientific Associate of the University TU Braunschweig, first at the Headquarters of Foundations (1976-78) and then at the Institute of Steel Structures (1978-81), where he elaborated on his Ph.D. thesis. In January 1980 he obtained his Welding Engineering Diploma of the educational and experimental Welding Organism of Hannover (SLV Hannover). In February 1981 he was declared Doctor of Engineering in the University TU Braunschweig.

He then moved to Greece where he worked at the Ministry of Public Works (January 1984 - October 1987). Since October 1987, he serves at the Civil Engineering School of NTUA. Today, he is a Professor of the School, Director of the Laboratory of Steel Constructions and Director of the Department of Structural Engineering.

His academic works include the instruction of Steel Structures I, II and III courses, Composite Structures and Steel Bridges at the School of Civil Engineering, as well as Steel Structures at the School of Surveying Engineering and at the Air Force Academy (WTS). He is a guest Professor at the POLITEHNICA University of Timisoara, Pοlitecnico di Milano, Schools of Civil Engineering and Architecture, Technical University Cluj-Napoca, Technical University Iasi, Brandenburgische Technische Universität Cottbus, and the University of Bradford, England.

He has composed 8 technical books on Steel Constructions, 3 of which have been translated in German and published by “Ernst & Sohn”. Moreover, he has been the editor of 5 books in English, while he has composed Chapters in 3 volumes of books, one of which in Stahlbaukelender 2009, published by “Ernst & Sohn”.

He has conducted 16 research programs of basic research, half of which received European funding and half International, 9 programs of applied research funded by firms and 5 educational programs funded by the EU. As part of the research programs he collaborated among others with the University of Aachen, Braunschweig, Cottbus, Milan, Naples, Trento, Liege, Lisbon, Clermont Ferrant, Krakow, Salfort, Nottingham, Manchester, Rennes, Timisoara, Cluj-Napoca, Bucarest, Iasi, Sofia.

He has been honoured with the title of Honorary Doctor at the University of Cluj-Napoca in Romania. He is a member of many national and international Composing Regulations Committees, including the Euro-code 3. He is a member of the editorial board of 3 international scientific magazines "Journal of Constructional Steel Research", member of international scientific committees of numerous national and international conferences and has participated as a Committee Member of several Ph.D. theses in Greece and abroad. He has authored approximately 150 papers in international journals and volumes of conference proceedings, many of which are presented in German magazines Stahlbau and Bauingenieur.

His professional work includes studies of buildings, industrial plants, steel and composite bridges, telecommunications, restorations-strengthening of existing buildings, tunnels, shelters, stadiums, etc. Many of his studies have been published in Greek and German magazines.

Monika Graf
Architect
Managing Partner of «M&M Architects» – Non-Executive Board Member of the Group

After graduating from Humbold Gymnasium in Bad Homburg in Germany, Monika Graf studied architecture at Darmstadt Polytecnic School from 1974 until 1982.

She worked for several years at F. Seelinger’s chair, “Visuelle Kommunikation” and during her work there she came into collaboration with the University of Venice for the “Ponte dell’ Accademia” project. Focusing on the subject of "Renaissance and modern architecture", she took part in numerous educational trips to various parts of Italy, such as Tuscany, Florence and Rome. She also travelled in Switzerland and France, focusing on the educational subject of “Tracing Le Corbusier”.

She composed her thesis under the guidance of Professor H. Striffler with the subject “House under a Bridge in Ludwigshafen”, for which she received honours. The project concerned a building complex with residential houses, shops, as well as the City Hall and concert hall.

During and after completing her studies, she worked in many architectural offices in Darmstadt and in Frankfurt.

She took part in architectural competitions, such as the formation of Lützow Square in Berlin, as well as a Cemetery in Stuttgart.

From 1983 to 1985, she worked in several architectural offices in Athens, and in 1985 she founded, along with her husband Makis Drimaropoulos, the architectural office “M&M Architects”.

From 1998 until 2007, she was a member of the Board of Trustees of the Administration Department of the German School of Athens. She served as president for 3 years and throughout the whole period that she participated in the Board she was also the president of the Building Works Department, being in charge of the renovations and extensions of the school. Works that she supervised include the extension of the Elementary School, the construction of the school’s canteen, the formation of the surrounding space of the school, renovations and anti-seismic reinforcements, as well as, in 2004, the installation of the largest photovoltaic system in Greece.

She is a member of the Athens Chamber of Commerce and Industry and she maintains excellent relationships with the German Embassy in Athens.

Anastasis Rigopoulos
Architect, Hospitality Designer
Anastasis Rigopoulos graduated from the National Technical University Athens in 1986.

Since then he has joined D.Rizos’s, Vikelas’ Practices. He has kept, also, his own Practice.

He has worked for the ”Foundation of the Hellenic World”.

From 2001 until 2014 he was with S75 Architects (member of the board).
His main focus is on large and medium Hospitality projects (not merely hotel complexes) as Architecture Designer and managing consultant.

Redefining Hospitality with a view to reviving cities and old settlements as well as paying attention to nature as landscape rather than to its “alleged” “organic” unity is the means to see again architecture and its “surroundings” nowadays.

During the last 20 years he was assigned various projects as Pr. Manager, Design coordinator or Design consultant.

An indicative list may include:
  • “Atalanti hills” (tourist resort, Greece)
  • “Pravita” (tourist resort, Greece)
  •  “The Iliad” (Ithaki) (tourist resort, Greece)
  •  “Rethink” (Athens)
  •  “Academy Gardens” (multifunctional complex, Athens)
  • “Costa Navarino”, Navarino dunes (temes) (tourist resort, Greece)
  • “Olimpia Riviera” (Grecotel) (tourist resort, Greece)
  •  “Delfinia” housing complex in Odessa, Ukraine
  • Tourist resort in Alatas islet (near Volos, Greece)
  • A number of small and medium hotels in Greece and Montenegro.
As a consultant he was, also, involved in Projects to do with traffic infrastructure, health, housing, hospitality, landscape and various other smaller Projects.

Currently he is aiming at shaping a consensus throughout key stakeholders in the Greek Hospitality sector on the forthcoming differentiated needs of the Sector.