Contact Person

The staff of Solexperts AG is made up of specialists from various fields. More than half of our employees are with Solexperts AG for more than 10 years. They guarantee quality, continuity and innovation. Below you find the contact persons for the various fields of activity.

If you would like to contact us, you can call directly via one of the extension numbers listed below or via +41 (0) 44 806 29 29. You are also welcome to send an e-mail to one of the contact persons listed below.

Executive Board

Thomas Fierz

Civil Engineer ETHZ

Managing director Solexperts AG and branches /
Manager Solexperts France SARL /
Manager Solexperts GmbH

T 0041 44 806 29 56
E-Mail

Dr. Thomas Trick

Hydrogeologist UPC

Managing director Solexperts AG and branches /
Manager Solexperts France SARL /
Manager Solexperts GmbH

T 0041 44 806 29 81
E-Mail

Secretariat, Accounting and Human Resources

Heidi Najem

Secretary and HR Specialist

Executive Assistant and Head of HR

T 0041 44 806 29 36
E-Mail

Sara Tokareff

Foreign trade specialist

Secretariat

T 0041 44 806 29 35
E-Mail

Martha Rüegg

Commercial clerk

Secretariat

T 0041 44 806 29 35
E-Mail

Anita Vogt

Accounting / HSE

Accounting / Health and Safety

T 0041 44 806 29 33
E-Mail

Maya Nötzli

Accounting

Accounting

T 0041 44 806 29 32
E-Mail

Geotechnics

Holger Wörsching

Civil Engineer

Member of the extended executive board
Division manager geotechnics /
Development of measuring systems / TDR probes /
Geotechnical instrumentation and measurements

T 0041 44 806 29 43
E-Mail

Markus Stolz

Civil Engineer

Member of the extended executive board
Division manager geotechnics /
Geotechnical instrumentation and measurements / hiDCon

T 0041 44 806 29 41
E-Mail

Marcel Hubrig

Geodetic Engineer

Deputy division manager geotechnics /
Geotechnical instrumentation and measurements /
Geodetic monitoring

T 0041 44 806 29 84
E-Mail

François Chevalier

Engineering Geologist ENSG

Project Manager
Geotechnical instrumentation and measurements /
French-speaking Switzerland

T 0041 44 806 29 34
E-Mail

Markus Guyer

Measurement technician

Project Manager
Borehole Measurements / Geotechnical instrumentation and measurements

T 0041 44 806 29 45
E-Mail

Muhammed Celik

Hydrogeologist and geotechnical engineer

Project Manager

T 0041 44 806 29 87
E-Mail

Christoph Mangold

Surveyor

Project Manager Geotechnics

T 0041 44 806 29 50
E-Mail

Thierry Krummenacher

Engineering Geologist ETHZ

Project Manager Geotechnics

T 0041 44 806 29 47
E-Mail

Samuel Fournier-Bidoz

Geotechnical engineer Ing. UGA

Project Manager Geotechnics and Monitoring

T 0041 44 806 29 46
E-Mail

Médéric Piedevache

Engineering Geologist ENSG

Member of the extended executive board
Branch manager Nancy, France

T 0033 3 83 94 04 50
E-Mail

Dr. Sebastian Brenne

Geoscientist

Project Manager

T 0049 234 904 4717
E-Mail

Axel Fabritius

Geophysicist

Member of the extended executive board
Branch manager Solexperts GmbH Karlsruhe
Thermal leak detection / Temperature measurements

T 0049 721 600 20
E-Mail

Hydrogeology

Karam Kontar

Engineering Geologist
Hydrogeologist CHYN

Member of the extended executive board
Division Manager Hydrogeology / Hydrogeological instrumentation and tests / Hydro-tests in shallow and deep boreholes

T 0041 44 806 29 85
E-Mail

Dr. Thomas Trick

Hydrogeologist UPC

Managing director Solexperts AG and branches /
Manager Solexperts France SARL /
Manager Solexperts GmbH

T 0041 44 806 29 81
E-Mail

Thomas Fierz

Civil Engineer ETHZ

Managing director Solexperts AG and branches /
Manager Solexperts France SARL /
Manager Solexperts GmbH

T 0041 44 806 29 56
E-Mail

Michael Kech

Geologist
Product Manager KVZ

Member of the extended executive board
Manager Hydro Systems / Groundwater monitoring and testing systems / Mining / CO2 sequestration / Marketing / Asia, South America

T 0041 44 806 29 54
E-Mail

Jocelyn Gisiger

Geologist ETHZ

Hydrogeological instrumentation and tests

T 0041 44 806 29 89
E-Mail

Yanick Lettry

Geologe / Hydrogeologist CHYN

Hydrogeological instrumentation and tests /
QM hydrogeological Instrumentation / Geochemistry

T 0041 44 806 29 53
E-Mail

Dr. Ursula Rösli

Geologist ETHZ

Hydrogeological evaluations / Reporting

T 0041 44 806 29 82
E-Mail

Dr. Nathan Dutler

Geophysist / Hydrogeologist CHYN

Project Manager

T 0041 44 806 29 59
E-Mail

Nadir Dazzi

Engineering Geologist ETHZ

Project Manager

T 0041 44 806 29 44
E-Mail

Muhammed Celik

Hydrogeologist and geotechnical engineer

Project Manager

T 0041 44 806 29 87
E-Mail

Giacomo Ruggia

Engineering Geologist ETHZ

Project leader

T 0041 44 806 29 42
E-Mail

Adrian Ammon

Geophysicist ETHZ

Project Manager

T 0041 44 806 29 24
E-Mail

Dr. Matthias Willmann

Hydrogeologist

Project manager hydrogeology and in-situ testing

T 0041 44 806 29 68
E-Mail

Gerd Klee

Geophysicist

Member of the extended executive board
Branch manager Solexperts GmbH Bochum
Hydrofrac tests / Geomechanical laboratory tests

T 0049 234 904 4715
E-Mail

Dirk Stawikowski

Geoscientist

Project leader

T 0049 234 904 4714
E-Mail

Médéric Piedevache

Engineering Geologist ENSG

Member of the extended executive board
Branch manager Nancy, France

T 0033 3 83 94 04 50
E-Mail

Alain Laurent

Hydrogeologist

Hydro-tests in deep boreholes, Hydrogeological instrumentation and tests / Geothermal projects

T 0033 6 29 25 67 79
E-Mail

Monitoring

Holger Wörsching

Civil Engineer

Member of the extended executive board
Division manager geotechnics /
Development of measuring systems / TDR probes /
Geotechnical instrumentation and measurements

T 0041 44 806 29 43
E-Mail

Markus Stolz

Civil Engineer

Member of the extended executive board
Division manager geotechnics /
Geotechnical instrumentation and measurements / hiDCon

T 0041 44 806 29 41
E-Mail

Marcel Hubrig

Geodetic Engineer

Deputy division manager geotechnics /
Geotechnical instrumentation and measurements /
Geodetic monitoring

T 0041 44 806 29 84
E-Mail

François Chevalier

Engineering Geologist ENSG

Project Manager
Geotechnical instrumentation and measurements /
French-speaking Switzerland

T 0041 44 806 29 34
E-Mail

Michael Kech

Geologist
Product Manager KVZ

Member of the extended executive board
Manager Hydro Systems / Groundwater monitoring and testing systems / Mining / CO2 sequestration / Marketing / Asia, South America

T 0041 44 806 29 54
E-Mail

Axel Fabritius

Geophysicist

Member of the extended executive board
Branch manager Solexperts GmbH Karlsruhe
Thermal leak detection / Temperature measurements

T 0049 721 600 20
E-Mail

Dr. Sebastian Brenne

Geoscientist

Project Manager

T 0049 234 904 4717
E-Mail

Médéric Piedevache

Engineering Geologist ENSG

Member of the extended executive board
Branch manager Nancy, France

T 0033 3 83 94 04 50
E-Mail

Dr. Thomas Trick

Hydrogeologist UPC

Managing director Solexperts AG and branches /
Manager Solexperts France SARL /
Manager Solexperts GmbH

T 0041 44 806 29 81
E-Mail

Thierry Krummenacher

Engineering Geologist ETHZ

Project Manager Geotechnics

T 0041 44 806 29 47
E-Mail

Samuel Fournier-Bidoz

Geotechnical engineer Ing. UGA

Project Manager Geotechnics and Monitoring

T 0041 44 806 29 46
E-Mail

Tom Renner

Mechanical Engineer

System developer

T 0041 44 806 29 88
E-Mail

hiDCon

Patrick Steiner

Civil Engineer

Member of the extended executive board
Division manager hiDCon
Development and design of measuring systems

T 0041 44 806 29 52
E-Mail

Markus Stolz

Civil Engineer

Member of the extended executive board
Division manager geotechnics /
Geotechnical instrumentation and measurements / hiDCon

T 0041 44 806 29 41
E-Mail

Daniel Siegenthaler

Consultant shooting ranges

E-Mail

Thomas Fierz

Civil Engineer ETHZ

Managing director Solexperts AG and branches /
Manager Solexperts France SARL /
Manager Solexperts GmbH

T 0041 44 806 29 56
E-Mail

Production, mechanical workshop, field technician

Rico Hafner

Technician HF Mechanical Engineering
Polymechanic, designer

Department manager hydromechanical workshop
Hydromechanics / development and construction measuring systems

T 0041 44 806 29 40
E-Mail

Simon Isler

Machine mechanic, designer

Department manager geomechanical workshop
Design engineer

T 0041 44 806 29 64
E-Mail

Christoph Eggenschwiler

Mechanical Engineer

Design engineer

T 0041 44 806 29 74
E-Mail

Markus Bosshard

Drillmaster

Chief Technician in-situ Testing

T 0041 44 806 29 71
E-Mail

Michael Wittenwiler

Technician

Production, assembly, field technician

T 0041 44 806 29 29
E-Mail

Dmitriy Putarev

Certified agricultural technician

Production, assembly, field technician

T 0041 44 806 29 29
E-Mail

Areomar Costa

Drillmaster

Production, assembly, field technician

T 0041 44 806 29 29
E-Mail

Peter Haller

Machine assembler

Field technician, deputy head of in-situ workshop

T 0041 44 806 29 77
E-Mail

René Hegetschweiler

Mechanic

Production, assembly, field technician

T 0041 44 806 29 29
E-Mail

Adem Jakupi

Technician

Production, assembly, field technician

T 0041 44 806 29 29
E-Mail

Hansueli Geisser

Technician

Production, Assembly, Field Technician

T 0041 44 806 29 29
E-Mail

Ivitsa Alexandrov

Technician

hiDCon Production, assembly, field technician

T 0041 44 806 29 29
E-Mail

Deyan Alexandrov

Technician

hiDCon Production, assembly, field technician

T 0041 44 806 29 29
E-Mail

Yakup Yestiti

Technician

Production

T 0041 44 806 29 29
E-Mail

Michael Weber

Polymechanic

Production

T 0041 44 806 29 69
E-Mail

Necib Sahin

Polymechanic

Production

T 0041 44 806 29 29
E-Mail

Patrick Hiltebrand

Polymechanic

Production

T 0041 44 806 29 29
E-Mail

Mario Barbosa

Precision mechanic

Production

T 0041 44 806 29 29
E-Mail

Electronics

Thomas Pichler

Electrical Engineer

Member of the extended executive board
Department manager electronics
Hard- and software development

T 0041 44 806 29 83
E-Mail

Roland Leu

Electronics technician

Deputy department manager electronics
Hard- and software development, Purchasing

T 0041 44 806 29 65
E-Mail

Michael Nötzli

Polymechanic

Technician

T 0041 44 806 29 66
E-Mail

Fabienne Kaufmann

Electronics technician

Electronics technician

T 0041 44 806 29 65
E-Mail

Fabian Bachofen

Electronics technician

Electronics technician

T 0041 44 806 29 38
E-Mail

Alain Hurni

Electronics technician

Electronics technician

T 0041 44 806 29 39
E-Mail

Design and development

Patrick Steiner

Civil Engineer

Member of the extended executive board
Division manager hiDCon
Development and design of measuring systems

T 0041 44 806 29 52
E-Mail

Rico Hafner

Technician HF Mechanical Engineering
Polymechanic, designer

Department manager hydromechanical workshop
Hydromechanics / development and construction measuring systems

T 0041 44 806 29 40
E-Mail

Tom Renner

Mechanical Engineer

System developer

T 0041 44 806 29 88
E-Mail

Simon Isler

Machine mechanic, designer

Department manager geomechanical workshop
Design engineer

T 0041 44 806 29 64
E-Mail

Christoph Eggenschwiler

Mechanical Engineer

Design engineer

T 0041 44 806 29 74
E-Mail

Thomas Pichler

Electrical Engineer

Member of the extended executive board
Department manager electronics
Hard- and software development

T 0041 44 806 29 83
E-Mail

Solexperts France SARL

Médéric Piedevache

Engineering Geologist ENSG

Member of the extended executive board
Branch manager Nancy, France

T 0033 3 83 94 04 50
E-Mail

Alain Laurent

Hydrogeologist

Hydro-tests in deep boreholes, Hydrogeological instrumentation and tests / Geothermal projects

T 0033 6 29 25 67 79
E-Mail

Benjamin Helmlinger

Engineering Geologist ENSG

Hydrogeological instrumentation, R&D

T 0033 3 83 94 04 53
E-Mail

Florian Brehin

Engineering Geologist ENSG

Project leader

T 0033 6 78 54 43 45
E-Mail

Melvin Parisi

Engineering Geologist ENSG

Project leader

T 0033 6 86 03 56 26
E-Mail

Dr. Vivien Navelot

PhD in Geosciences

Project leader

T 0033 6 43 73 63 89
E-Mail

Aude Pierre

Engineering Geologist ENSG

Project leader

T 0033 7 89 55 33 03
E-Mail

Esther Huguenot

Engineering Geologist ENSG

Project leader

T 0033 6 88 63 88 83
E-Mail

Mark Lenschenko

Engineering Geologist ENSG

Project Leader

T 0033 6 45 12 63 23
E-Mail

Thiermo Touré

Technician

Measurement technician

T 0033 6 43 73 68 27
E-Mail

Anne Piedevache

Business graduate

Administration and Accounting

T 0033 3 83 94 04 55
E-Mail

Solexperts GmbH, MeSy Bochum

Gerd Klee

Geophysicist

Member of the extended executive board
Branch manager Solexperts GmbH Bochum
Hydrofrac tests / Geomechanical laboratory tests

T 0049 234 904 4715
E-Mail

Dr. Sebastian Brenne

Geoscientist

Project Manager

T 0049 234 904 4717
E-Mail

Dirk Stawikowski

Geoscientist

Project leader

T 0049 234 904 4714
E-Mail

Florian Seebald

Technician

T 0049 234 904 4713
E-Mail

Richard Ide Berger

Geoscientist

Project leader

T 0049 234 904 4714
E-Mail

Tobias Bunse

Technical physical laboratory technician

Field and laboratory technician

T 0049 234 904 4717
E-Mail

Fabian Storz

Physical-technical assistant

Field and laboratory technician

T 0049 234 904 4717
E-Mail

Ulrike Frankenberg

Business graduate

Accounting and Finance

T 0049 234 904 4711
E-Mail

Solexperts GmbH, GTC Karlsruhe

Axel Fabritius

Geophysicist

Member of the extended executive board
Branch manager Solexperts GmbH Karlsruhe
Thermal leak detection / Temperature measurements

T 0049 721 600 20
E-Mail

Dr. Gaël Dumont

Engineer / Geoscientist

Project manager

T 0049 721 6654 6130
E-Mail

Dr. Franz Lutz

Geophysicist

Project manager

T 0049 721 6654 6126
E-Mail

Barbara Heinemann

Geophysicist

Project manager

T 0049 721 6654 6129
E-Mail

Kai Zurek

Geologist

Project leader

T 0049 721 6654 6128
E-Mail

Philipp Heidinger

Geophysicist

IT expert

T 0049 721 6654 6130
E-Mail

Matias Welter

Geologist

Project manager

T 0049 721 6654 6127
E-Mail

Jamal Joud

Environmental Geoscientist

Project leader

T 0049 159 0637 6968
E-Mail