René Deubner gained his first professional experience in the offices of the real estate agents, CBRE, and with the real estate portfolio manager and project developer, S Immo AG, before going on to acquire professional skills in project management and technical building appraisal at GFP Enders Projektmanagement GmbH.

In 2013, together with Werner Enders, he founded GFP Real Estate Management GmbH, in which he established the field of technical services for building clients as co-founder and managing director.

Among others, René Deubner was responsible for the following projects during the past 5 years in the role of managing director or project manager:

Project management for a construction volume of over 120m €:
including the new-build of around 27,000 m² of office rental space, conversions from single-tenant to multi-tenant buildings and various Capex measures to the existing building with around 45,000 m² of rental space at Siemensdamm 62 in Berlin (a project for AXA and Caleus TechnoCampus Berlin GmbH); diverse Capex measures in the Barthonia Forum in Cologne (a project for Tristan Capital Partners); diverse Capex measures in the Sarotti-Höfe in Berlin (a project for Berggruen Holding); roof and façade refurbishment works to the Treptower buildings in Berlin (a project for AEW Europe)

Tenant fit-out works in over 45,000 m² of rental space:
for, inter alia, Lufthansa, Spie, VHV, SNP, Fidor Bank, Pyrexx, Arxes Tolina and Eurasia at Siemensdamm 62 in Berlin (a project for Caleus TechnoCampus Berlin GmbH); for DM, KIK, Woolworth, Palmer Hargreaves and Social Fashion in the Barthonia Forum property in Cologne (a project for Tristan Capital Partners); for Deutsche Post and Advitam at Graf-Adolf-Strasse in Düsseldorf (a project for Pure AG)

TDD reviews for buildings with a total of 1,400,000 m² of rental space:
inter alia, for Berlin-Mitte Town Hall and Neukölln Arcaden in Berlin, as well as the Barthonia Forum (4711) property and DuMont Carrée in Cologne; Parsevalstrasse in Düsseldorf and Werfthaus, Speicherstrasse 55 in Frankfurt for Tristan Capital Partners; Alexanderplatz 8 in Berlin for SIGNA Prime Selection AG; Siemensdamm 62 in Berlin for Caleus TechnoCampus Berlin GmbH; Johannisstrasse 20 in Berlin for pwr development GmbH; a portfolio in Würzburg, Nuremberg, Fürth and Röthenbach for ActivumSG; Blue Portfolio in Berlin, Leipzig, Heidelberg and Freiburg, and Unter den Linden 13 in Berlin for Caleus Capital Investors GmbH; Teilestrasse 11- 13 in Berlin for BEOS AG

At the end of 2019, the qualified lawyer (Dipl.-Jur.) and urban planner (Dipl.-Ing.) founded GFP Deubner GmbH with the objective of providing the fullest possible set of top-level technical services for construction projects of all kinds.