Board of Directors

The Board of Directors is responsible for managing the IDW. It comprises executive as well as non-executive members and directs the operations of the IDW, unless the Board of Directors resolves otherwise for particular business.

Executive members of the Board of Directors:

Melanie Sack
Sack, Melanie | CEO

Born in 1970, Chief Executive Officer of the IDW since January 1, 2024.

  • Graduated (1996) as Diplom-Kauffrau [business studies degree], thereafter diverse roles in auditing firms of varying sizes, including Warth & Klein GmbH in Düsseldorf and Ernst & Young AG in Hannover; Manager at the Wirtschaftsprüferkammer [Chamber of Public Accountants] (WPK) in Berlin from 2010 to 2012
  • Professional examinations as Steuerberaterin [licensed tax advisor in public practice] in 2002 and as Wirtschaftsprüferin [German public auditor] in 2005.
  • Active in the IDW since 2012; Head of Department for Membership Services and Public Relations, from 2016 Markets and Communications.
  • 2018 Chief Operating Officer (COO) of the IDW, 2022 Deputy Chief Executive Officer
  • Since October 2020 Member of Advisory Board of the Forum for Digital Data Analysis in Deggendorf e.V. (DFDDA)
  • Since June 2022 Member of the Sustainable Finance Advisory Committee of the Federal Government in the 20th legislative term
  • Since July 2023 Member of Advisory Board of the Deutsches Rechnungslegungs Standards Committee e.V. (DRSC)
  • Since 2024 Member of Advisory Board of the Schmalenbach-Gesellschaft für Betriebswirtschaft e.V.

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Moser, Torsten

Born in 1981, Member of the Executive Board of the IDW since January 1, 2023.

  • 2007 Graduation as a Diplom-Kaufmann (business studies degree) at the University of Duisburg-Essen
  • 2007 to 2012 employed by Deloitte & Touche, Düsseldorf
  • 2012 Joined the IDW
  • 2015 Doctorate (Dr. rer. oec.) at the University of Wuppertal
  • 2016 appointed as Wirtschaftsprüfer [German public auditor]
  • Since 2023 Lecturer at the Institut für Rechnungslegung und Wirtschaftsprüfung, Westfälische Wilhelms-Universität in Münster
  • Member of the Gesprächskreis Internationales Bilanzrecht (discussion group on international accounting law)
  • Member of Advisory Board of DATEV

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Siegel, Daniel P.

Born in 1983, Member of the Executive Board of the IDW since January 1, 2024.

  • 2008 Graduation as a Diplom-Kaufmann (business studies degree) at the University of Münster
  • 2008 to 2012 employed by KPMG, Düsseldorf, and Research Assistant (PhD program) at the Institute of Accounting and Auditing, University of Münster
  • 2011 Doctorate (Dr. rer. pol.) at the University of Münster
  • 2012 to 2015 employed by KPMG, Düsseldorf
  • 2014 appointed as Steuerberater [licensed tax advisor in public practice]
  • 2015 joined the IDW; since 2022 as Technical Director Financial Services
  • 2019 appointed as Wirtschaftsprüfer [German public auditor]
  • Since 2023 Lecturer at the Institute of Accounting and Auditing, University of Münster

Non-executive members of the Board of Directors:

Ingmar Rega
Rega, Ingmar | President

Born in 1968, non-executive member since November 2017, President since November 2023.

Jochen Haußer
Haußer, Jochen | Deputy President

Born in 1966, non-executive member and Deputy President since November 2023.

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Jacobs, Annedore

Born in 1966, non-executive member since November 2023.

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Koch, Clemens

Born in 1969, non-executive member since November 2023.

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Krug, Volker

Born in 1972, non-executive member since November 2023.

Martin Wambach
Wambach, Martin

Born 1964, non-executive member since September 2019.