Our team

Working together for better hearing

Our passion is to help people hear better – and that is what unites us.
To achieve this goal, we work together every day, combining our expertise in research, product development and audiology. This diversity is our strength and enables us to offer a wide range of products and services. From innovative software solutions and service studies to personal consultations, you will find the right contact person for your needs here.

Our areas at a glance:

management
Services
Products
Research
Audiology
IT & Data Protection
Marketing & Sales
Newborn Hearing Screening (NHS)

management

Sebastian Quirandt

Managing Director
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+49 441 2172-149

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quirandt@hz-ol.de

Prof. Dr. Dr. Birger Kollmeier

Scientific Management
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+49 441 2172-100

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kollmeier@hz-ol.de

Dr. Rüdiger Schönfeld

Medical Management
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+49 441 2172-100

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schoenfeld@hz-ol.de

Services

Petra Fritz

Team Leader Reception
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+49 441 2172-100

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fritz@hz-ol.de

Sabine Gurthat

Reception
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+49 441 2172-100

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gurthat@hz-ol.de

Lars Völkers

Reception & Administration
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+49 441 2172-169

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voelkers@hz-ol.de

Elke Hemken

Administration
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+49 441 2172-212

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hemken@hz-ol.de

Sabrina Lucke

Administration & DGA Office
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+49 441 2172-207

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lucke@hz-ol.de

Niklas Grunewald

Technology & Laboratory
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+49 441 2172-208

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grunewald@hz-ol.de

Thomas Grzybowski

IT System & Network Administrator, Data Protection Officer GDPR
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+49 441 2172-148

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grzybowski@hz-ol.de

Ruvimbo Pfende

IT System & Network Administrator
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+49 441 2172-146

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pfende@hz-ol.de

Dr. Markus Meis

Strategic Partnerships Manager
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+49 441 2172-141

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meis@hz-ol.de

PRODUCTS

Laura Hartog

Project Manager
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+49 441 2172-246

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hartog@hz-ol.de

Dr. Dirk Oetting

Project Manager
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+49 441 2172-241

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oetting@hz-ol.de

Dr. Thomas Wittkop

Technical Product Management Quality Representative (QR)
& Software Developer
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+49 441 2172-262

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wittkop@hz-ol.de

Björn Oehne

Sales
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+49 441 2172-138

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oehne@hz-ol.de

Nina Behrends

Marketing
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+49 441 2172-217

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behrends@hz-ol.de

Ilka Junker

Marketing
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+49 441 2172-203

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junker@hz-ol.de

Dr. Sarah Blum

Software Developer
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+49 441 2172-247

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blum@hz-ol.de

Moritz Brandt

Software Developer
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+49 441 2172-243

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brandt@hz-ol.de

Vincent Hamann

Software Developer
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+49 441 2172-203

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hamann@hz-ol.de

Tobias Herzke

Software Developer
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+49 441 2172-206

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herzke@hz-ol.de

Research

Dr. Kirsten Wagener

Head of Research & Authorized Signatory
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+49 441 2172-143

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wagener@hz-ol.de

Prof. Dr. Volker Hohmann

Chief Scientist
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+49 441 2172-100

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info@hz-ol.de

Dr. Hendrik Kayser

Project Manager
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+49 441 2172-321

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kayser@hz-ol.de

Dr. Tahereh Afghah

Research Scientist
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+49 441 2172-184

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afghah@hz-ol.de

Thomas Bisitz

Research Scientist
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+49 441 2172-209

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bisitz@hz-ol.de

Dr. Mats Exter

Research Scientist
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+49 441 2172-188

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exter@hz-ol.de

Theresa Jansen

Research Scientist
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+49 441 2172-218

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jansen@hz-ol.de

Dr. Melanie Krüger

Research Scientist
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+49 441 2172-139

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krueger@hz-ol.de

Guido Ubben

Research Assistant
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+49 441 2172-188

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ubben@hz-ol.de

Audiology

Sandra Hauken

Head of Audiology
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+49 441 2172-145

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hauken@hz-ol.de

Jan Heeren

Project Manager
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+49 441 2172-245

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heeren@hz-ol.de

Janique Reinwaldt

Project Manager & Test Manager
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+49 441 2172-165

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reinwaldt@hz-ol.de

Dr. Matthias Vormann

Project Manager
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+49 441 2172-183

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vormann@hz-ol.de

Dr. Alexandra Winkler

Project Manager
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+49 441 2172-168

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winkler@hz-ol.de

Dr. Melanie Zokoll

Project Manager
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+49 441 2172-164

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zokoll@hz-ol.de

Müge Gökalan

Team Leader Test Managers
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+49 441 2172-133

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goekalan@hz-ol.de

Christian Albers

Test Manager
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+49 441 2172-139

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albers@hz-ol.de

Lisa Puhlemann

Test Manager
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+49 441 2172-100

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puhlemann@hz-ol.de

Anja Schröck

Test Manager
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+49 441 2172-100

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schroeck@hz-ol.de

Chiara Haf

Test Manager & Hearing system consultation
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+49 441 2172-131

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haf@hz-ol.de

Kevin Rethorn

Test Manager & Hearing system consultation
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+49 441 2172-130

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rethorn@hz-ol.de

Kerstin Sommer

Test Manager & Hearing system consultation
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+49 441 2172-136

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sommer@hz-ol.de

Diana Stücke


Project Coordination Newborn Hearing Screening (NHS) Lower Saxony
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+49 441 2172-134

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stuecke@hz-ol.de

Jana Behrens


Project Coordination Newborn Hearing Screening (NHS) Lower Saxony
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+49 441 2172-170

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behrens@hz-ol.de

Anja Kreuteler


Project Coordination Newborn Hearing Screening (NHS) Lower Saxony
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+49 441 2172-135

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kreuteler@hz-ol.de

Contact
Contact
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