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We at pbo – an interdisciplinary team of highly qualified engineers from the fields of process engineering, civil engineering and electrical engineering – have understood that natural resources are finite. As specialists in sustainable recycling technology, we are therefore passionate about putting our know-how at the service of processing, recycling and renewable energies. This is how we protect the environment and climate – and take responsibility for the world of tomorrow.

From the idea to post-commissioning – processing plants from a single source

Whether mechanical or biological treatment: as an independent engineering office, we plan modern waste management plants and implement them for you from A to Z. This means that we accompany you from the initial idea to commissioning and beyond. In doing so, we include all questions of construction technology in our process engineering planning. 

pbo – that means a lot of experience, a high degree of flexibility and a cooperative partnership

At pbo, you benefit from short internal channels and a well-coordinated team. This makes us particularly flexible and quick to react. Founded in 1993 by Prof. Dr. Thomas Pretz, Dipl.-Ing. Thomas Bergedieck and Dipl.-Ing. Klaus Jörg Onasch, we offer you many years of planning experience, a cooperative partnership – and a service that is just right for you!

Team

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Dr.-Ing. Dipl.-Wirt.-Ing. Marcel GrünbeinManaging Director

+49 241 978 89 22
gruenbein@pbo.de

Professional training:
2006 – 2010 Doctorate in the Faculty of Georesources and Materials Engineering at RWTH Aachen University
Degree: Dr.-Ing.

2005 – 2007 Additional studies in economics for engineers and natural scientists at the Fernuniversität Hagen; Focus: General Business Administration, Operations Research
Degree: Dipl.-Wirt.-Ing.

1998 – 2003 Studies in the Faculty of Georesources and Materials Engineering at RWTH Aachen University: Waste Management Engineering; Focus: Processing and Recycling
Degree: Dipl.-Ing.

Professional activity:
2013 – present Managing Director of Ingenieurgesellschaft pbo mbH
2010 – 2012 Authorised Signatory and Head of the Process Technology division of Ingenieurgesellschaft pbo mbH
2006 – 2009 Project Manager at Ingenieurgesellschaft pbo mbH
2003 – 2006 Project Engineer at Ingenieurgesellschaft pbo mbH

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M.Sc. Dennis WegkampManaging Director

+49 241 978 89 16
wegkamp@pbo.de

Professional training:
2008 – 2014 Waste management engineering at RWTH Aachen University; specialisation in processing and recycling
Degree: M.Sc.

Professional activity:
2022 – present Lecturer at the Chair for Anthropogenic Material Cycles (A.N.T.S.) at RWTH Aachen University for the subject Planning of Waste Treatment Plants
2022 – present Managing Director at Ingenieurgesellschaft pbo mbH
2019 – 2022 Project manager at Ingenieurgesellschaft pbo mbH with commercial power of attorney
2012 – 2019 Project Engineer at Ingenieurgesellschaft pbo mbH

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Dipl.-Ing. Thomas BergedieckConsultant

+49 241 978 89 0
bergedieck@pbo.de

Professional training:
1978 – 1982 Studies in civil engineering, specialising in construction process engineering at the FH Aachen University of Applied Sciences
Degree: Dipl.-Ing.

Professional activity:
2023 – present Consultant at Ingenieurgesellschaft pbo mbH
1993 – 2022 Shareholder and Managing Director of Ingenieurgesellschaft pbo mbH
1985 – 1993 Project Engineer / Managing Director at TILKE, Ingenieure für Umwelttechnik, Aachen
1982 – 1985 Calculator / Site Manager at a medium-sized construction company (Reinert, Borken)

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Dipl.-Ing. Klaus Jörg OnaschConsultant

+49 241 978 89 0
onasch@pbo.de

Professional training:
09/1977 – 01/1984 Studies in civil engineering at RWTH Aachen University; specialisation: hydraulic engineering and foundation engineering
Degree: Dipl.-Ing.

Professional activity:
2022 – present Consultant at Ingenieurgesellschaft pbo mbH
1993 – 2022 Shareholder and Managing Director of Ingenieurgesellschaft pbo mbH
1987 – 1993 Project Engineer at the planning office TILKE, Ingenieure für Umwelttechnik, Aachen.
From 1991 Managing Director
1985 – 1987 Scientific assistant at the Institute for Urban Water Management at the University of Essen
1985 Project Engineer at HYDROTEC, Aachen. Collaboration in the simulation of the groundwater situation in the area of the Georgswerder landfill, Hamburg
1984 Project-related Site Manager at the company Held+Franke, Cologne for the turnkey construction of a 10-storey residential building

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Dr.-Ing. Thomas PretzConsultant

+49 241 978 89 0
pretz@pbo.de

Professional training:
1983 – 1988 Doctorate in mining at RWTH Aachen University
Degree: Dr.-Ing.

1977 – 1983 Studied mining engineering at RWTH Aachen University; Specialisation: Preparation
Degree: Dipl.-Ing.

Professional activity:
2022 – present Consultant at Ingenieurgesellschaft pbo mbH
1997 – 2020 Holder of the Chair and Head of the Institute for Processing and Recycling (I.A.R.) at RWTH Aachen University
1993 – 2022 Shareholder at Ingenieurgesellschaft pbo mbH
1993 – 2008 Managing Director at Ingenieurgesellschaft pbo mbH
1990 – 2005 Partner of HTP, Engineering Company for Processing Technology and Environmental Process Engineering
1989 – 1993 Project Engineer at TILKE, Engineers for Environmental Technology, Aachen
1988 – 1989 Senior Engineer at the Institute for Processing Technology
1983 – 1988 Scientific assistant at the Institute for Treatment with Prof. Hoberg, RWTH Aachen University 

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Iris NowackOffice Management

+49 241 978 89 11
nowack@pbo.de

Professional training:
Training in office administration

Professional activity:
2013 – present Office Management Specialist at Ingenieurgesellschaft pbo mbH
2002 – 2012 Secretary to the management of a bookshop
1995 – 2002 Commercial employee   

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B.Sc. Elisa Brück

+49 241 978 89 32
brueck@pbo.de

Professional training:
2017 – present Environmental engineering at RWTH Aachen University
Degree: B.Sc.

Professional activity:
2021 – present Project engineer at Ingenieurgesellschaft pbo mbH
2018 – 2021 Tutor for Mechanics at the AMT (RWTH)

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M.Sc. Tim Hafer

+49 241 978 89 35
hafer@pbo.de

Professional training:

2017 – 2020 Environmental engineering at RWTH Aachen University
2012 – 2017 Studied environmental engineering at the TU Freiberg
2011 – 2012 Studied civil engineering at the University of Applied Sciences Cologne
Degree: M.Sc.

Professional activity:
2019 – present Project Engineer at Ingenieurgesellschaft pbo mbH

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M.Sc. Pinkas Hoffmann

+49 241 978 89 28
hoffmann@pbo.de

Professional training:
2015- 2022 Industrial Engineering Electrical and Energy Technology at RWTH Aachen University
Degree: M.Sc.

Professional activity:
2019 – present Project engineer at Ingenieurgesellschaft pbo mbH

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M.Sc. Laura Hollerbach

+49 241 978 89 15
l.hollerbach@pbo.de

Professional training:
2011 – 2017 Environmental engineering at RWTH Aachen University
Degree: M.Sc.

Professional activity:
2022 – present Project Engineer at Ingenieurgesellschaft pbo mbH
2017 – 2022 Research assistant at the ANTS of RWTH Aachen University
2016 – 2017 student worker at I.A.R. of RWTH Aachen University

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M.Sc. Rainer Hollerbach

+49 241 978 89 26
hollerbach@pbo.de

Professional training:
2011 – 2017 Environmental engineering at RWTH Aachen University
Degree: M.Sc.

Professional activity:
2016 – present Project Engineer at Ingenieurgesellschaft pbo mbH

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Dipl. -Ing. Jörg Imberg

+49 241 978 89 19
imberg@pbo.de

Professional training:
Studied mining at RWTH Aachen, TU Clausthal Zellerfeld; specialised in processing
Degree: Dipl.-Ing.

Professional activity:
1994 – present Project Engineer/Project Manager at Ingenieurgesellschaft pbo mbH
1991 – 1994 Project Engineer at the planning office HTP Ingenieurgesellschaft, Aachen

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Valentin Lembgen

+49 241 978 89 32
lembgen@pbo.de

Professional training:
2020 – present Sustainable Resources and Energy Supply at RWTH Aachen University

Professional activity:
2022 – present Project engineer at Ingenieurgesellschaft pbo mbH

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M.Sc. Cedric Pereira

+49 241 978 89 23
pereira@pbo.de

Professional training:
2010 – 2015 Waste management engineering at RWTH Aachen University; specialisation in processing and recycling
Degree: M.Sc.

Professional activity:
2013 – present Project Engineer at Ingenieurgesellschaft pbo mbH

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M.Sc. Dustin Raguse

+49 241 978 89 37
raguse@pbo.de

Professional training:
2011 – 2020 Environmental engineering at RWTH Aachen University
Degree: M.Sc.

Professional activity:
2018 – present Project Engineer at Ingenieurgesellschaft pbo mbH

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M.Sc. Martin Simons

+49 241 978 89 14
simons@pbo.de

Professional training:

2011 – 2016 Environmental engineering at RWTH Aachen University

Degree: M.Sc.

Professional activity:

2022 – present Project Engineer at Ingenieurgesellschaft pbo mbH
2016 – 2022 Research assistant at the ANTS of RWTH Aachen University

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Steffen Schmädecker

+49 241 978 89 32
schmaedecker@pbo.de

Berufsausbildung:

2021 – heute Umweltingenieurwissenschaften an der RWTH Aachen

2016 – 2021 Umweltingenieurwesen an der TU Braunschweig

Abschluss: B. Sc.

 

Berufstätigkeit:

2023 – heute Projektingenieur bei der Ingenieurgesellschaft pbo mbH

2022 – 2023 Studentische Hilfskraft am ANTS der RWTH Aachen

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Professional training:
2017- present Environmental engineering at RWTH Aachen University

Professional activity:
2021 – present Project engineer at Ingenieurgesellschaft pbo mbH

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Dipl.-Ing. Stefan Schneider

+49 241 978 89 12
schneider@pbo.de

Professional training:
1994 – 1995 Additional studies in environmental sciences
Degree: Magister Artium, M. Techn.

1985 – 1994 Studied electrical engineering/energy technology at RWTH Aachen University
Degree: Dipl.-Ing.

Professional activity:
2001 – present Project Manager at Ingenieurgesellschaft pbo mbH
1996 – 2000 Project Engineer at Ingenieurgesellschaft pbo mbH

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M.Sc. Leonard Schorn

+49 241 978 89 41
schorn@pbo.de

Professional training:

2013 – 2023 Environmental engineering at RWTH Aachen University

Degree: M.Sc

Professional activity:

2022 – present Project engineer at Ingenieurgesellschaft pbo mbH

2019 – 2023 part-time at gabco Kompostierung GmbH

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Gerrit Schulz

+49 241 978 89 32
schulz@pbo.de

Professional training:
2019 – present Sustainable Resources and Energy Supply at RWTH Aachen University

Professional activity:
2022 – present Project engineer at Ingenieurgesellschaft pbo mbH

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B. Eng. Jonas Steinamann

+49 241 978 89 13
steinmann@pbo.de

Professional training:
2018 – 2022 environmental engineering with a focus on waste management at University Weihenstephan – Triesdorf
2017 – 2018 biotechnology at University Weihenstephan – Triesdorf
Degree: B. Eng.

Professional activity:
2023 – present Project engineer at Ingenieurgesellschaft pbo mbH
2021 – 2023 material flow manager at Wurzer Umwelt GmbH

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M.Sc. Mitia Wohlgemuth

+49 241 978 89 29
wohlgemuth@pbo.de

Professional training:
2011 – 2019 Environmental engineering at RWTH Aachen University
Degree: M.Sc.

Professional activity:
2019 – present Project Engineer at Ingenieurgesellschaft pbo mbH

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M.Eng. Nils Amende

+49 241 978 89 36
amende@pbo.de

Professional training:
2018 – 2023 civil engineering at FH Aachen University
2015 – 2018 civil engineering at RWTH Aachen University
Degree: B.Eng.

Professional activity:
2021 – present Project engineer at Ingenieurgesellschaft pbo mbH

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Dipl.-Ing. Philipp Bohlender

+49 241 978 89 21
bohlender@pbo.de

Professional training:
2000 – 2006 Studied civil engineering at the FH Aachen
Degree: Dipl.-Ing.

Further training as Health and Safety Coordinator

Professional activity:
2008 – present Project Engineer at Ingenieurgesellschaft pbo mbH
2006 – 2008 Project Engineer at Aachener Sachverständigen für Geologie, Grundbau und Altlastensanierung, ASG, Aachen

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Dipl.-Ing. Michael Hütten

+49 241 978 89 20
huetten@pbo.de

Professional training:
2001 – 2007 Studied civil engineering at the University of Essen
Degree: Dipl.-Ing.

1994 – 1997 Vocational training as a skilled building construction worker Degree: Concrete and reinforced concrete builder

Professional activity:
2009 – present Project Engineer at Ingenieurgesellschaft pbo mbH
2008 – 2009 Project-related Site Manager at Jacob Durst GmbH

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M.Sc. Tom Jansen

+49 241 978 89 38
jansen@pbo.de

Professional training:
Environmental engineering at RWTH Aachen University
Degree: M.Sc.

Professional activity:
2021 – present Project Engineer at Ingenieurgesellschaft pbo mbH
2021 – 2021 Research assistant at Erftverband Bergheim

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B. Eng. Miriam Lürkens

+49 241 978 89 32
luerkens@pbo.de

Professional training:
2019 – present civil engineering at FH Aachen University
2017 – 2019 civil engineering at RWTH Aachen University
Degree: B. Eng.

Professional activity:
2023 – present Project engineering at  Ingenieurgesellschaft pbo mbH

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B.Eng. Patrick Perse

+49 241 978 89 40
perse@pbo.de

Professional training:
2018 – present Civil engineering FH Aachen University
2016 – 2018 Environmental engineering at RWTH Aachen University
Degree: B.Eng.

Professional activity:
2020 – present Project engineer at Ingenieurgesellschaft pbo mbH

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B.Sc. Norman Rickard

+49 241 978 89 32
rickard@pbo.de

Professional training:
2014 – present civil engineering at RWTH Aachen University
Degree: B.Sc.

Professional activity:
2022 – present Project engineer at Ingenieurgesellschaft pbo mbH

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M.Eng. Tobias Roglic

+49 241 978 89 17
roglic@pbo.de

Professional training:
Studied civil engineering at the FH Aachen, specialising in Water and waste management
Degree: M.Eng.

Professional activity:
2020 – present Project Engineer at Ingenieurgesellschaft pbo mbH

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M.Eng. Tobias Schmitz

+49 241 978 89 34
schmitz@pbo.de

Professional training:
2014 – 2021 Civil engineering at FH Aachen University of Applied Sciences
Degree: M.Eng.

2011 – 2014 Specialist for Recycling and Waste Management

Professional activity:
2017 – present Project Engineer at Ingenieurgesellschaft pbo mbH

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Nour Tchalabi

+49 241 978 89 32
tchalabi@pbo.de

Professional training:

2018 – present civil engineering at RWTH Aachen University

Professional activity:

2022 – present Project engineer at Ingenieurgesellschaft pbo mbH

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Mohamad Bakri

+49 241 978 89 39
Bakri@pbo.de

Professional training:

2011 – 2016 Architectural studies at the University of Damascus, Syria.

Degree: B. Architect

 

Professional activity:

2023- present Specialist in architecture

2022 – 2023 Designer and BIM modeler at IDK Kleinjohann GmbH &Co.KG

2020 – 2021 Self-employed architect

2017 – 2020 Site manager at construction company in Syria

2013 – 2022 Designer – freelance (Dubai,UAE  KSA Damascus)

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Beate EnkirchDraughtswoman

+49 241 978 89 31
enkirch@pbo.de

Professional training:
1990 – 1993 Further training as CAD draughtswoman
1986 – 1990 Training as technical draughtswoman

Professional activity:
2020 – present Draughtswoman in the Design department of Ingenieurgesellschaft pbo mbH
1993 – 2019 Draughtswoman in an engineering office in the field of structural and civil engineering

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Birgit Lichterstate-certified technician

+49 241 978 89 24
lichter@pbo.de

Professional training:
1992 – 1996 part-time further training at the Aachen University of Applied Sciences
Degree: state-certified technician, specialising in civil engineering

1988 – 1991 Training as draughtswoman, specialising in civil engineering

Professional activity:
1994 – present Technician in the Design department of Ingenieurgesellschaft pbo mbH
1992 – 1994 Draughtswoman in the Design department, DAR – Deutsche Abwasser Reinigungsgesellschaft Aachen, Engineering Office for Environmental Issues
1988 – 1992 Draftswoman in the Civil Engineering Office of the city of Stolberg

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Melanie Mingersstate-certified technician

+49 241 978 89 27
mingers@pbo.de

Professional training:
2009 – 2013 part-time further education at the Aachen University of Applied Sciences
Degree: state-certified technician, specialising in structural engineering

2006 – 2009 Training as a draughtswoman specialising in civil engineering, road construction and landscaping at the company Bast GmbH (construction accounting for the construction company Dohmen GmbH & Co KG)

Professional activity:
2012 – present state-certified technician in the Design department of Ingenieurgesellschaft pbo mbH
2011 – 2012 Draughtswoman in the Beckers engineering office in Geilenkirchen
2009 – 2011 Accountant at Bast GmbH (construction accounting for the construction company) 

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Arthur Seifridstate-certified technician

+49 241 978 89 18
seifrid@pbo.de

Professional training:

Part-time further education at the University of Applied Sciences Aachen

2011 – 2014 Training as a draftsman in civil engineering, road construction and landscaping at the company TUTTAHS & MEYER Engineering Company

Degree: State-certified technician – civil engineering

Professional activity:

2014 – present state-certified technician in the design department of Ingenieurgesellschaft pbo mbH

 

2011 – 2014 Draughtsman in the office of TUTTAHS & MEYER Ingenieurgesellschaft

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