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.

Sonja Bruns

Dipl.-Ing. Landcape Architect
Corporate partner

sonja.bruns@gtl-hamburg.de

+49 (0) 40 – 5379876 -71

Since 2023 Corporate Partner at GTL
Since 2022 Member of Hamburgischen Architektenkammer
Since 2022 Employee at GTL
2016 – 2022 Ramboll Studio Dreiseitl, Hamburg
2012 – 2016 Gerber Architekten und Landschaftsarchitekten, Hamburg
2004 – 2012 Breimann&Bruun Landschaftsarchitekten, Hamburg
1998 – 2004 Study Architecture Bauhaus University, Weimar / IUV University Venedig

Michael Triebswetter

Dipl.-Ing. Landscape Architect
Corporate partner

michael.triebswetter@gtl-kassel.de

+49 (0) 561 – 78946 -38

seit 2023 Coroporate Partner at GTL Landschaftsarchitektur
 2017- 2022 Sole Owner of GTL Michael Triebswetter Landschaftsarchitekt
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

Katrin Mauer

Dipl.-Ing. Landscape Architect
Corporate partner

katrin.mauer@gtl-hamburg.de

+49 (0) 40 – 537876 -72

Since 2023 Corporate partner at GTL
Since 2022 Employee at GTL
2018 – 2022 Breimann & Cie Landschaftsarchitektur, Hamburg
2012 – 2017 Gerber Architekten und Landschaftsarchitekten, Hamburg
Since 2012 Member of Architektenkammer Hamburg
2007 – 2012 Breimann&Bruun Landschaftsarchitekten, Hamburg
2004 – 2007 GTL Landschaftsarchitektur, Kassel und Peking
1997 – 2004 Studied Landscape Architecture at Universität Kassel

Sadik Deniz Akman

M.Sc. in Landscape Architecture
Project team member, competitions, project team leader
Joined GTL in 2015

deniz.akman@gtl-kassel.de

+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

Helge Baake

B.Sc. Landscape architect
Project Team Leader, Project Team Member
Joined GTL in 2022

helge.baake@gtl-hamburg.de

+49 (0) 40 – 5379876 -74

Since 2020 Landscape Architekt, Hamburg Chamber of Architects
Until 2016 Bachelor’s degree in Landschaftscape Architecture, Hochschule Ostwestfalen-Lippe Höxter

Jule Benedix

M.Sc. in Landscape Architecture
Project team member, project team leader
Joined GTL in 2015

jule.benedix@gtl-kassel.de

+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

philipp.brandt@gtl-kassel.de

+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

phan.do@gtl-kassel.de

+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

celina.ebbert@gtl-kassel.de

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

lisa.elsner@gtl-hoexter.de

+49 (0) 5271 – 693816 – 4

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

betty.fan@gtl-kassel.de

+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, BIM-Manager
Joined GTL as draftsman in 2021

taji.faqiri@gtl-kassel.de

+49 (0) 561-78946- 62

2018 – 2021 trainee as draftsman at GTL

Stefanie Grebe

Student
Joined GTL as a student assistant in 2021

stefanie.grebe@gtl-kassel.de

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

sabine.gruber@gtl-kassel.de

+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

yu.hao@gtl-kassel.de

+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

nicole.hohmann@gtl-kassel.de

+49 (0) 561 – 78946 -41

Since 2001 State-accredited Business Economist

Franziska Itter

Student
Joined GTL as a student assistent in 2023

franziska.itter@gtl-kassel.de

Since 2020 Study of Landscape Architecture and Landscape Planning, University of Kassel

Katharina Janusch

M.Sc. Landscape Architect AKH
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

Stefan Kettlitz

Landscape Architect AKH bdla
Project team leader, construction management
Joined GTL in 2016

stefan.kettlitz@gtl-kassel.de

+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

Juliana Klusmann

Student
Joined GTL as a student assistant in 2022

juliana.klusmann@gtl-kassel.de

Seit 2022 Master’s degree in Landscape Architecture and Landscape Planning, University of Kassel
2018 – 2022 Bachelor’s degree in open space planning at Osnabrück University of Applied Sciences

Stefanie Knoblich

Student
Joined GTL as a student assistant in 2022

stefanie.knoblich@gtl-kassel.de

Since 2018 Study of Landscape Architecture and Landscape Planning, University of Kassel

Andreas Körbs

Landscape Architect
Project team leader, construction management
Joined GTL in 2017

andreas.koerbs@gtl-kassel.de

+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

melanie.lips@gtl-kassel.de

+49 (0) 511 – 8984 -471

Until 2003 Studied for Diploma in Architecture, Leibniz University, Hannover

Chiara Loffredi

M.Eng. Landscape architecture
Project Team Member
Joined GTL in 2023

chiara.loffredi@gtl-hamburg.de

+49 (0) 40 – 5379876 -76

Until 2021
International Master of Landscape Architecture at the University of Applied Sciences HfWU Nürtingen-Geislingen
2015 – 2018 B.Sc. Università di Roma La Sapienza und Università degli Studi della Tuscia

Liming Meng

M.Sc. in Urban and Regional Planning
Project team member, competitions
Joined GTL in 2017

liming.meng@gtl-kassel.de

+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

joanna.mueller@gtl-hoexter.de

Since 2018 Studying Landscape Architecture, TH OWL Höxter

Sara Nejatianrad

M.Sc. Landschaftscape architecture
Project team member
Joined GTL in 2017

sara.nejatianrad@gtl-kassel.de

+49 (0) 561 – 78946 -48

Until 2018
Master’s degrees in Landscape architecture,  Hochschule Anhalt, Bernburg
Until 2011
Bachelor’s degrees Industrial design, University of Mashhad, Iran

Manuela Parra

Trainee draughtswoman
Joined GTL as a team member in 2023

manuela.parra@gtl-kassel.de

+49 (0) 561-78946- 57

Since 2023 Trainee draughtswoman at GTL

Philipp Schäfer

Student
Joined GTL as a student assistant in 2023

philipp.schaefer@gtl-kassel.de

Since 2020 Study of Landscape Architecture and Landscape Planning, University of Kassel

Sandra Sennhenn

Landscape Planner
Project leader
Joined GTL in 2010

sandra.sennhenn@gtl-kassel.de

+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

tina.stamm@gtl-kassel.de

+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 Architect
Project Team Member
Joined GTL in 2021

pia.urban@gtl-kassel.de

+49 (0) 561 – 78946 -56

Until 2021 Studied Landscape Planning and Landscape Architecture, University of Kassel
2018 – 2021 Joined GTL as a Student Assistant

Lars Weinerth

Dipl.-Ing. Landscape architect,    M.Sc. Urban planning
Project Team Leader, Project Team Member
Joined GTL in 2023

lars.weinerth@gtl-hamburg.de

+49 (0) 40 – 5379876 -73

Until 2009 Master’s programme, HafenCity University Hamburg
Until 2006 Diploma programme,  Landscape Architecture Hochschule Ostwestfalen-Lippe Höxter

Nellie Weiß

M.Sc. Landscape Architecture
Project Team Member
Joined GTL in 2024

nellie.weiss@gtl-hoexter.de

+49 (0) 5271 – 693816 -3

2021 – 2023 Joined GTL as a Student assistant
2018 – 2024 Studying Landscape Architecture, TH OWL Höxter

Ines Wodrich

Architect
Project Management
Joined GTL in 2001

ines.wodrich@gtl-kassel.de

+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

mingge.yu@gtl-kassel.de

+49 (0) 561 – 78946 -53

Until 2007 Studied Product Design, College of Fine Arts, Kassel
Until 2000 Studied at Luxun Art Academy, China

Yumeng Zhang

M.Sc. in Landscape Architecture
Project team member, competitions
Joined GTL in 2016

yumeng.zhang@gtl-kassel.de

+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