Office | Profile
Markus Gnuechtel and Michael Triebswetter founded GTL Gnuechtel – Triebswetter landscape architects in 1991 in Kassel, the city of the world famous nature park, the upland called Wilhelmshoehe. GTL is also active in China, where there is, starting 2005, a shared Peking office with Rainer Schmidt landscape architects. In 2007 the opening of a further office location followed in Duesseldorf.
The owners’ credo: to realise innovative designs with best possible perfection in detailed planning and project management. Participating in numerous competitions – usually announced as pan-European competitions – gives the office the opportunity to constantly break new grounds in conceptual thinking and in the final realisation and presentation of its design ideas.
Numerous awards in competitions – among them 30 mostly highest awards, e.g. the internationally highly recognised first award for Pier 40 (with TECarchitecure, Los Angeles) in Manhattan, New York, and several national and international Landscape Design Awards reflect GTL’s constant thrive for the best possible result.
When competing for the design, which is contemporary, and complies with the planning task, the basic questions at the beginning and during the design process are, however, simple: What is the spirit of the location? Were there formal and historical ideas and concepts in the past, which are related to the task? Can these historical concepts be translated into contemporary concepts of shape and material? How is the design integrated in the cultural context? The human being is in the centre of all thoughts: his longing for beauty, his love of nature as well as of art, his need for calmness as well as for hurly-burly, for certain security and excessive surprise, the way he loves to revel in memories, as well as the need for integration in the cultural context of his time.
As the task differs from project to project by nature, the replies to the basic planning tasks must turn out differently, too. Committed to the clarity of modernity and to the poetry of garden design motives and surprising design in their materials and use of details, the subsequent projects show a representative profile from the works of GTL.

Michael Triebswetter
Dipl.-Ing. Landscape architect
Owner of GTL
michael.triebswetter@gtl-kassel.de
+49 (0) 561 – 78946 -38
Since 2017 | Sole owner of GTL |
2011-2012 | Visiting Professor, University of Kassel |
2008 | Lectureship Technical University München-Weihenstephan |
1994 | Lectureship at GhK Kassel |
1991 | Founded own office GTL | Gnüchtel Triebswetter Landschaftsarchitekten |
Until 1991 | WES & Partner, Hamburg |
Until 1988 | Studied Landscape Architecture at Technical University, München-Weihenstephan |

Sadik Deniz Akman
M.Sc. in Landscape Architecture
Project team member, competitions, project team leader
Joined GTL in 2015
+49 (0) 561 – 78946 -51
Until 2017 | Studied for Master’s degree in Urbanism and Urban Planning, Technical University of the Middle East in Ankara |
Until 2013 | Studied for Bachelor’s degree in Landscape Architecture and Landscape Planning, Technical University of the Middle East in Ankara |

Jule Benedix
M.Sc. in Landscape Architecture
Project team member, project team leader
Joined GTL in 2015
+49 (0) 561 – 78946 -24
Until 2018 | Studied Landscape Planning and Landscape Architecture, University of Kassel |

Philipp-Emanuel Brandt
M.Sc. in Landscape Architecture
Project team leader, construction management
Joined GTL in 2016
+49 (0) 561 – 78946 -44
Until 2016 | Studied Landscape Planning and Landscape Architecture, University of Kassel |

Duy Phan Do
M.Eng. in Landscape Architecture
Project team member, competitions
Joined GTL in 2018
+49 561 – 789 46 – 65
Until 2019 | Studied for Master’s degree in Landscape Architecture, University of Nürtingen-Geislingen |
Until 2013 | Studied for Bachelor’s degree in Architecture and Planning, National University of Civil Engineering, Vietnam |

Celina Ebbert
Student
Joined GTL as a student assistant in 2020
Since 2008 | Studied Landscape Planning and Landscape Architecture, University of Kassel |

Lisa Elsner
M. Sc. Landscapearchitecture
Project team member, construction management
Joined GTL in 2019
+49 (0) 5253 – 86803 65
Until 2016 | Studied Landscape Architecture, advanced technical college Ostwestfalen Lippe, Höxter |

Sebastian Elsner
B.Sc. in Landscape Architecture
Project team leader, construction management
Joined GTL in 2020
sebastian.elsner@gtl-hoexter.de
+49 (0) 561-78946- 34
Since 2017 | Studied Landscape Planning and Landscape Architecture, University of Ostwestfalen-Lippe, Höxter |

Betty Pixiang Fan
Landscape Architect
Project team member
Joined GTL in 2009
+49 (0) 561-78946- 33
until 2008
until 2003 |
Studied Landscape Architecture, Anhalt University of Applied Sciences, Bernburg, Germany
Studied Landscape Architecture, Sichuan Agricultural University, Sichuan, China |

Taji Faqiri
Draftsman
Joined GTL as draftsman in 2021

Stefanie Grebe
Student
Joined GTL as a student assistant in 2021
Since 2018 | Studying Landscape Planning and Landscape Architecture, University of Kassel |

Sabine Gruber
B.Sc. in Landscape Architecture
Acquisition, project team member
Joined GTL in 2020
+49 (0) 561-78946- 43
Until 2016 | Studied Landscape Planning and Landscape Architecture, University of Kassel |

Yu Hao
M.Sc. in Landscape Architecture
Project team member, competitions
Joined GTL in 2014
+49 (0) 561-78946- 49
Until 2017 | Studied for Master’s degree in Landscape Architecture and Landscape Planning, University of Kassel |
Until 2010 | Studied for Bachelor’s degree in Landscape Architecture, Beijing Forestry University, Beijing, China |

Nicole Hohmann
State-accredited Business Economist
Accounting systems | Personnel management
Joined GTL in 2000

Katharina Janusch
M.Sc. in Landscape Architecture
Project team leader
Joined GTL in 2017
katharina.janusch@gtl-kassel.de
+49 (0) 561 – 78946-39
Until 2016 | Studied Landscape Planning and Landscape Architecture, University of Kassel |

Safiye Kelebek
M.Sc. in Landscape Architecture
Project team member
Joined GTL in 2021
+49 561 – 78946 – 47
2014 – 2020 | Studied Landscape Planning and Landscape Architecture, University of Kassel |
2016 – 2020 | Joined GTL as a Student Assistant |

Stefan Kettlitz
Landscape Architect AKH bdla
Project team leader, construction management
Joined GTL in 2016
+49 (0) 561 – 78946 -21
2013 – 2016 | Chairperson of the Hessen Regional Association of the Federation of German Landscape Architects |
Until 1995 | Studied Landscape Planning and Landscape Architecture, University of Kassel |
1987 – 1990 | Studied for Intermediate Diploma in Landscaping, Technical University, Munich-Weihenstephan |
Until 1987
Until 1984 |
Work as landscape gardener in Berlin and Bern
Trained as landscape gardener, Berlin |

Andreas Körbs
Landscape Architect
Project team leader, construction management
Joined GTL in 2017
+49 (0) 561 – 78946 -45
Until 1988 | Studied Landscaping, Technical College, Weihenstephan in Freising,specialisation: space-planning |
Until 1983 | Trained in gardening and landscaping |

Melanie Lips
Architect
Project leader
Joined GTL in 2012
+49 (0) 511 – 8984 -471
Until 2003 | Studied for Diploma in Architecture, Leibniz University, Hannover |

Liming Meng
M.Sc. in Urban and Regional Planning
Project team member, competitions
Joined GTL in 2017
+49 (0) 561 – 78946 – 58
Until 2013 | Studied for Master’s degree in Architecture, Brandenburg Technical University, Cottbus |
Until 2012 | Studied for Master’s degree in Urban and Regional Planning, Brandenburg Technical University, Cottbus |
Until 2010 | Studied for Bachelor’s degree in Architecture, Brandenburg Technical University, Cottbus |
Until 2004 | Studied for Bachelor’s degree in Visual Communication, University of Hangzhou, China |

Joanna Müller
Student
Joined GTL as a student assistant in 2021
Since 2018 | Studying Landscape Architecture, TH OWL Höxter |

Sara Nejatianrad
M.Sc. in Landscape Architecture
Project team member
Joined GTL in 2017
sara.nejatianrad@gtl-kassel.de
+49 (0) 561-78946- 48
Since 2015 | Studied for Master’s degree in Landscape Architecture, College Anhalt, Bernburg, Germany |
Until 2011 | Studied for Bachelor’s degree in Industrial Design, University of Mashhad, Iran |

Harald Noll
Architect
Project leader, project development
Joined GTL in 1998
+49 (0) 561 – 78946 -12
2015 | Teaching assignment, University of Kassel |
2003 | Diploma in Architecture Part 2 |
1997 | Diploma in Architecture Part 1 |
Until 1997 | Studied Architecture, University of Kassel |
Until 1994 | Royal Danish Academy of Arts, Copenhagen |
Until 1993 | Architecture, University of Kassel |

Marcello Romano
Architect
Project team member
Joined GTL in 2019
+49 (0) 561 – 78946-40
Until 2004 | DEA in Architecture, Energy and Environment, University Politècnica de Catalunya BarcelonaTECH, Spain |
Until 1999 | Studied Architecture, Università degli Studi di Palermo, Italien |
Until 1997 | Studied Architecture, University of Kassel |

Sandra Sennhenn
Landscape Planner
Project leader
Joined GTL in 2010
+49 (0) 561 – 78946 -42
Until 2010 | Studied Landscape Planning and Landscape Architecture, University of Kassel |

Tina Stamm
Landscape Architect
Project team leader
Joined GTL in 2012
+49 (0) 561 – 78946 -40
Until 2009 | Studied Landscape Planning and Landscape Architecture, University of Kassel |

Sibylle Triebswetter
Economist
Management
Joined GTL in 1999
sibylle.triebswetter@gtl-kassel.de
+49 (0) 561 – 78946 -10
Until 1995 | Studied Business Management, University of Applied Sciences, Osnabrück |

Pia Urban
M.Sc. in Landscape Architecture
Project Team Member
Joined GTL in 2021
+49 (0) 561 – 78946 -56
Until 2021 | Studied Landscape Planning and Landscape Architecture, University of Kassel |
2018 – 2021 | Joined GTL as a Student Assistant |

Nellie Weiß
Student
Joined GTL as a student assistant in 2021
Since 2018 | Studying Landscape Architecture, TH OWL Höxter |

Ines Wodrich
Architect
Project Management
Joined GTL in 2001
+49 (0) 561 – 78946 -23
Until 2000 | Studied Architecture, University of Kassel |
Until 1992 | Diploma studies and engineering qualification in Building Materials and Silicate Technology, University of Freiberg |

Mingge Yu
Diploma in Design
Competitions, detailed design
Joined GTL in 2008
+49 (0) 561 – 78946 -53
Until 2007 | Studied Product Design, College of Fine Arts, Kassel |
Until 2000 | Studied at Luxun Art Academy, China |

Fabian Zeipert
Student
Joined GTL as a student assistant in 2020
Since 2018 | Studied Landscape Planning and Landscape Architecture, University of Kassel |

Yumeng Zhang
M.Sc. in Landscape Architecture
Project team member, competitions
Joined GTL in 2016
+49 (0) 561-78946-22
Until 2017 | Studied for Master’s degree in Landscape Architecture and Landscape Planning , University of Kassel |
Until 2012 | Studied for Bachelor’s degree in Landscape Architecture, Beijing Forestry University, China |