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
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
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
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
Yanick Lettry
Geologe / Hydrogeologist CHYN
Hydrogeological instrumentation and tests /
QM hydrogeological Instrumentation / Geochemistry
T 0041 44 806 29 53
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
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
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
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, ballistic protection systems
former federal shooting range expert
T Mobile: +41 (0) 78 231 00 71
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
Dmitriy Putarev
Certified agricultural 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
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
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
Simon Isler
Machine mechanic, designer
Department manager geomechanical workshop
Design engineer
T 0041 44 806 29 64
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
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
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
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
