Personalities
Movers and shakers with expertise
Our experts come from a wide range of different fields. What they all share is the same integrated approach to consulting – and the same goal: to join forces with you to achieve the best possible results for you. We love new challenges. But we don’t do things by half measures. When we do something, we do it right. And we enjoy doing it.
Search and find
Looking for a point of contact for a specific issue or specialist field? Feel free to use our search function. If you want to search for a specific name, the alphabetic team overview can take you straight to what you are looking for. This section lists contact information as well as areas of expertise and practice areas.
All of us look forward to getting to know you – and to working with you to find just the right solution for your individual needs.
Berthold Decker
public auditor, tax advisor
Specific industry knowledge
- Agriculture and Forestry
- Freelance income, especially healthcare professions
- Metalworking
- Real estate management, real estate, property
Focus of services
- Annual audit
- Tax planning advice
- Inheritance tax and succession planning
- Company succession and legal form
Professional career
- Appointment as public auditor (1982)
- Appointment as tax advisor (1981)
- Studies: economics, Saarbrücken; Degree (1974)
Berthold Decker
public auditor, tax advisor
Dr. Dominik Decker
tax advisor
Specific industry knowledge
- Agriculture and Forestry
- Medium-sized businesses
- Medical practices
Focus of services
- Tax advice for medium-sized companies and entrepreneurs
- Creation of annual accounts
- Business analysis and planning; Creation of profitability and liquidity plans
- Succession advice
- Digital financial accounting
Professional career
- Partner at ADKL (since 2017)
- Tax advisor at ADKL (since 2014)
- Appointment as tax advisor (2014)
- Tax advisor at Dr. Harzem and partners (2012-2014)
- Doctorate: Rheinische Friedrich-Wilhelm Universität Bonn – Research Associate (2007-2012)
- Studies: Business Administration, University of Passau (2001-2006)
Dr. Dominik Decker
tax advisor
Philipp Dietz
lawyer, authorised translator
Focus of services
- Labor Law
- Corporate Law
- Insurance Law
Professional career
- Partner at ADKL (since May 2020)
- Lawyer in medium-sized commercial law firms
- Lawyer since 2013
- Legal Internship (2011-2013)
- Work in a medium-sized auditing firm (2008-2010)
- Studies and legal clerkship with focus on tax law
- Translator (since 2004)
- Daimler Chrysler and Mercedes Benz Mexico (2000-2003)
Philipp Dietz
lawyer, authorised translator
Roland Dudek
it auditor, audit manager
Specific industry knowledge
- Real estate business
- Trade
- Software manufacturer / information technology
Focus of services
- (Group) annual audits
- Issuing of software certificates according to IDW PS 880
- IT tests according to IDW PS 330
- Project accompanying exams according to IDW PS 850
- Lecturer activities
Professional career
- IT auditor IDW (since January 2017)
- Audit manager at ADKL (since 2015) along with predecessor companies (since 2006)
- Studies: Business administration, Niederrhein University of Applied Sciences (2000-2005)
Roland Dudek
it auditor, audit manager
Mihrican Duman
hr manager
Focus of services
- Recruiting
- Active Sourcing
- Human Resources Management
- Process Optimization and HR Projects
Professional career
- Senior Consultant, SMC SteinMart GmbH & Co. KG (2018-2022)
- Human Resources Planner, Partner Personaldienste Süd-West GmbH (2016-2018)
- Project Manager, ibau GmbH (2012-2016)
Mihrican Duman
hr manager
Elena Duscha
tax advisor
Specific industry knowledge
- IT sector
- Service sector
- Energy industry
Focus of services
- Corporate taxation
- Taxation of individuals
- Accompanying external audits
- Creation of annual accounts
- Accompanying digital accounting
Professional career
- Appointment tax advisor (2014)
- Tax specialist (since 2010)
- Tax Assistant (since 2003)
Elena Duscha
tax advisor
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