We are all specialists, but we find solutions as a team

Geschäftsführung – Teamvorstellung

Geschaftsfuehrung

Porträt von Volker Hummel

Volker Hummel

Tax advisor

Auditor

Degree in business administration (FH)

Tax advice

hummel@concept-tax.de
Porträt von Bettina Harms

Bettina Harms

Tax advisor

Diploma in Business Administration

Tax advice, specialist consultant for corporate succession DStV e.V.

harms@concept-tax.de

Jan Saulheimer

Tax advisor

Diploma in Taxation (FH)

Tax advice

saulheimer@concept-tax.de
Gründer – Teamvorstellung

Gründer

Porträt von Werner Renkes

Werner Renkes

Auditor

Founder and Freelancer

Degree in business administration (FH)

Special Projects

info@concept-tax.de

Joachim Wittlich

Auditor

Freelancer and former partner

Fully qualified lawyer

Auditing

wittlich@concept-tax.de
Steuerberater – Teamvorstellung

Steuerberater

Porträt von Nina Bitz

Nina Bitz

Tax advisor

Master of Arts in Taxation

CONCEPTer since August 2017

Year-end work, tax returns, financial accounting

bitz@concept-tax.de
Porträt von Romina Dietzen

Romina Dietzen

Tax advisor

Graduate in finance (FH)

CONCEPTer since July 2016

Tax consultancy, procedural law, health care consultant (IBG / HS Bremerhaven)

dietzen@concept-tax.de
Porträt von Laura Lenz

Laura Lenz

Tax advisor

CONCEPTer since January 2016

Tax advice

lenz@concept-tax.de
Porträt von David Marx

David Marx

Tax advisor

Business graduate

CONCEPTer since October 2017

Auditing, tax advice

marx@concept-tax.de
Porträt von Kerstin Neubauer

Kerstin Neubauer

Tax advisor

Graduate economist

CONCEPTer since August 2019

Tax advice, support for international companies, value added tax, Consultant for restructuring and corporate planning DStV e.V.

neubauer@concept-tax.de
Porträt von David Stenner

David Stenner

Tax advisor

with Master of Arts in Taxation degree programme

CONCEPTer since August 2015

Tax advice

stenner@concept-tax.de
CONCEPTer:innen – Teamvorstellung

CONCEPTer

Porträt von Jonas Bauer

Jonas Bauer

Accountant

Tax clerk

CONCEPTer since January 2020

Year-end work, tax returns, financial accounting

bauer@concept-tax.de
Porträt von Sandra Bingenheimer

Sandra Bingenheimer

Tax specialist

Tax clerk

CONCEPTer since January 2020

Year-end work, tax returns, financial accounting

bingenheimer@concept-tax.de
Porträt von Sandra Buchheim

Sandra Buchheim

Accountant

Tax clerk

CONCEPTer since October 1999

Financial accounting, controlling

buchheim@concept-tax.de

Eda Celik

Tax Assistant

Tax clerk

Bachelor of Arts (DHBW)

CONCEPTer since October 2023

Year-end work, tax returns, financial accounting

celik@concept-tax.de
Porträt von Andrea Flicker-Wurth

Andrea Flicker-Wurth

Payroll and financial accountant

CONCEPTer since March 2018

Financial accounting

flicker-wurth@concept-tax.de

Heide Heim

Payroll and financial accountant

CONCEPTer since July 2024

Payrolls, financial accounting

heim@concept-tax.de
Porträt von Christiane Hoch

Christiane Hoch

Accountant

Tax clerk

CONCEPTer since May 2015

Year-end work, tax returns, financial accounting

hoch@concept-tax.de
Porträt von Doreen Jung

Doreen Jung

Tax specialist

Tax clerk

CONCEPTer since May 2018

Year-end work, tax returns, financial accounting

jung@concept-tax.de
Porträt von Ulrike Junker

Ulrike Junker

Payroll and financial accountant

CONCEPTer since March 2014

Payrolls, financial accounting

u.junker@concept-tax.de

Laura Nathalia Karpinski

Tax and Audit Assistant

Master of Arts

CONCEPTer since March 2024

Year-end work, tax returns

karpinski@concept-tax.de
Porträt von Philipp Klein

Philipp Klein

tax clerk

CONCEPTER since October 2022

Year-end work, tax returns, financial accounting

klein@concept-tax.de
Porträt von Johannes Klinger

Johannes Klinger

tax clerk

CONCEPTer since August 2021

Year-end work, tax returns, financial accounting

klinger@concept-tax.de
Porträt von Kristina La Rocca

Kristina La Rocca

tax clerk

CONCEPTer since January 2024

Year-end work, tax returns, financial accounting

larocca@concept-tax.de

Daniel Mak

Tax Assistant

Master of Taxation

CONCEPTER since October 2022

Year-end work, tax returns, financial accounting

mak@concept-tax.de
Porträt von Nadja Müller

Nadja Müller

Accounting specialist

CONCEPTer since January 2020

Financial accounting

n.mueller@concept-tax.de

Merve Nacaroglu

Human resources administrator

Office management clerk

CONCEPTer since June 2023

Payrolls

nacaroglu@concept-tax.de

Mandy Nguyen

Tax clerk

CONCEPTER since October 2022

Year-end work, tax returns, financial accounting

nguyen@concept-tax.de
Porträt von Kerstin Press

Kerstin Press

Tax clerk

Degree in business administration (FH)

CONCEPTer since March 2006

Year-end work, tax returns, financial accounting

press@concept-tax.de
Porträt von Meike Primorac

Meike Primorac

Tax clerk

CONCEPTer since October 2020

Payrolls

primorac@concept-tax.de

Claudia Scheiber

Tax clerk

CONCEPTer since January 2020

Payrolls, financial accounting

scheiber@concept-tax.de
Porträt von Ines Wagner

Ines Wagner

Tax clerk

CONCEPTer since June 2019

Payrolls, tax returns

wagner@concept-tax.de
Porträt von Monika Weyer

Monika Weyer

Tax clerk

CONCEPTer since July 1991

Year-end work, tax returns, financial accounting

weyer@concept-tax.de
Porträt von Adrian Wolf

Adriana Wolf

Tax clerk

CONCEPTer since September 2021

Payrolls

wolf@concept-tax.de
Organisation – Teamvorstellung

Organisation

Heike Geiss

Office clerk

CONCEPTer since June 2024

Reception

geiss@concept-tax.de
Porträt von Bianka Hensel

Bianka Hensel

Data processing clerk

CONCEPTer since August 2007

Law firm management, internal accounting

hensel@concept-tax.de
Porträt von Beate Riemer

Beate Riemer

Office clerk

CONCEPTer since October 2020

Reception

riemer@concept-tax.de
Porträt von Jutta Schaefer

Jutta Schaefer

Office clerk

CONCEPTer since June 2018

Administration

schaefer@concept-tax.de
Azubis – Teamvorstellung

Azubis

Kambiz Kayhanfar

Trainee as a tax clerk

CONCEPTer since August 2023

kayhanfar@concept-tax.de
IT – Teamvorstellung

IT

Porträt von David Thelen

David Thelen

IT consultant

CONCEPTer since May 2020

Digitization, interfaces, document management

thelen@concept-tax.de

Talent wanted

Career

"Any meeting that lasts longer than an hour and doesn't even involve laughter is considered aggravated assault."
If you would like to start or further develop your career in the field of business and tax consulting in a competent and (usually) good-humoured team of colleagues, become a CONCEPTer.

Start career

Over 30 years of CONCEPT Renkes & Partner mbB

Our company history

The history of our company goes back to the year 1988 when we were founded in Mainz. Before that, our founder Werner Renkes had already been working as a tax consultant for around 8 years with two colleagues in a partnership. We are here for you with this experience!

About the company history

Let's get started!

Contact us
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