Kostas was born in Piraeus in 1963.
He graduated from the Architectural School of the National Technical University of Athens in 1990.
From 1985 to 1989, he worked in the office of Anastasios and Dimitrios Biris & Associates where he studied public buildings and participated and excelled as an associate in Architectural Competitions.
He is co-founder and member of Theros Architecture from 1993 to present.
From 2007 to 2010, together with other members of Theros Architecture, he has been partner in Domes Architects E. Apostolidis & Associates EU and studied a large number of public buildings.
He is Member of Greek Architects Association and TECHNICAL CHAMBER OF GREECE (R.n.61104).
He is a registered Greek Public Works Designer (R.n.14981) and holds a Class C Degree in Public Works category n.6 & 7.

Yannis Ragousis was born in Athens in 1962.
He graduated from the Architectural School of the National Technical University of Athens in 1987.
He worked in various architectural firms and participated and excelled as an associate in Architectural Competitions.
He is co-founder and member of Theros Architecture from 1993 to present.
From 2007 to 2010, together with other members of Theros Architecture, he has been partner in Domes Architects E. Apostolidis & Associates EU and studied a large number of public buildings.
He is Member of Greek Architects Association and TECHNICAL CHAMBER OF GREECE (R.n.50760).
He is a registered Greek Public Works Designer (R.n.8921) and holds a Class C Degree in Public Works category n.6 & 7.

Katerina was born in Piraeus in 1976.
She graduated from the School of Architecture of the Aristotle University of Thessaloniki in 2001. In 2003, she obtained her master’s degree in “Urban and Regional Planning” from N.T.U.A. (National Technical University of Athens).
After her graduation from the AUTH and until 2007, she worked for THEROS in Private and Public Architectural Projects.
From 2007 to 2013, Katerina worked for the Architectural Office “ISV ARCHITECTS and ASSOCIATES”, as a Lead Architect at Detailed Design Projects Department and Construction Supervision.
In 2013 she joined THEROS again and became Partner in 2015, as she holds a Design Class B Degree in Public Works for categories 06/07.

Tzeni was born in Arta in 1976.
She graduated from the School of Architecture of the Aristotle University of Thessaloniki in 2001.
After her graduation from the AUTH and until 2009, she worked for construction company OIKOGRAMMI S.A. as a Senior Architect and Construction Manager in private Works.
From 2009 to 2015, Tzeni worked as a freelancer Architect (design and construction of private works).
In 2015 she joined THEROS and became Partner, as she holds a Design Class B Degree in Public Works for categories 06/07.

Olga was born in Athens in 1963.
She graduated from the School of Architecture of the National Technical University of Athens, in June 1989.
In May 1992 she obtained her master’s degree in Advanced Architectural Design from the Graduate School of Architecture, Planning and Preservation, Columbia University.
During the last year of her undergraduate studies she worked as an intern for the Ministry of Environment, City Planning and Public Works.
After her graduation from the NTUA she worked at the Architectural practice “Linos Kydoniatis Architects” (1989-1991).
From 1992 to 1994, Olga worked as a Junior Architect for the Japanese firm “Yendo Associated Architects and Engineers”, based in New York City.
In December 1995 she joined the Architectural & Engineering firm “Takis Gavrilis & Associates” as a Senior Architect and in 2004 she became a Project Manager, focusing in Sports and Healthcare Facilities Design, until her resignation in April 2012.
From 1999 to 2001 she collaborated with the Architectural firms “Zege Architects / Zeppos – Georgiadi” and “Klearhos Maleas – Takis Theodoris” as a freelance Architect.
She joined THEROS in July 2013 and became Partner in 2015, as she holds a Class A Design Degree in Public Works for categories 06 & 07.

Angeliki was born in Patras in 1987.
She graduated from the School of Architecture of the National Technical University of Athens in 2011. In 2013 she obtained her master’s degree in International Architectural Regeneration and Development from Oxford Brookes University.
After her graduation from the NTUA she worked as an intern at the architectural practice “Moustroufis Architects” (2011-2012). From 2014 to 2016, Angeliki joined the office “Eleftheria Deko Lighting Design”, focusing on Architectural Lighting Design for private and public projects. In 2016 and 2017 she cooperated with the architectural practice “Studio K45 architecture”, as an Architect.
She joined THEROS in May 2017 and became Partner in 2019, as she holds a Class A Design Degree in Public Works for categories 06 & 07.

Dimitris was born in Athens in 1985.
He graduated from the School of Architecture of the Democritus University of Thrace in 2012.
From 2012 to 2014, Dimitris worked in cooperation with the office “Dimitris Economou Interiors” as an Interior Designer & Construction Supervisor in Renovation Projects focused on Hospitality and Commercial sites around Greece.
Since then worked as a freelance architect until March of 2017, when he joined THEROS. In 2019 became Partner, as he holds a Class A Design Degree in Public Works for categories 06 & 07.

Lia was born in Evia in 1970.
She graduated from the Designers School of the Technical Institution of Athens in 1996.
Lia works in THEROS since 1998 and she is one of the first members of the Office.
She is responsible for Landscaping, Renovation and Internal Restoration projects and yet also for Objects Detailed Design.

Kostas was born in Athens in 1974.
He graduated from the School of Urban Planning and Regional Development of the University of Thessaly (U.TH.) in 1998 & in 1999, he obtained his master’s degree in “Urban and Regional Planning” also from U.TH.
After his graduation from the U.TH. and till 2009, he worked as a construction Manager in private projects for construction company OIKOGRAMMI S.A., from authorization through to completion, including co-ordination and sourcing of materials, manpower and budgets.
From 2009 till now he works as an associate for company ACP-HELLAS Ltd, which manufactures and distributes globally expansion joint covers for buildings.
Also, he is a THEROS collaborator in his specialty and as a Certified Energy Inspector (Class C, for Buildings).
He holds a Design Class A Degree in Public Works for categories 02/27.

Nikolas was born in Athens in 1995. He graduated from the School of Architecture of the National Technical University of Athens in 2021. Since September of the same year, he is studying for a master’s degree in the postgraduate programme: Architecture – Spatial Design and more specifically in the field of Research in Architecture: Architectural Design – Space – Culture. Nikolas joined Theros Architects in October of 2022.

Mary was born in Athens in 1997. She completed her Master in Architectural Engineering at Democritus University of Thrace in 2022. In the last year of her studies, she was educated on natural building and the design of Permaculture. She did her thesis on the creation of a sustainable and self-sufficient Eco-Village and today she is focused on sustainable and bioclimatic architecture. She joined Theros Architects in January of 2023.