The Management Board is the administrative and management body of CNC. In this respect, the Management Board has the broadest powers to achieve the purpose of the grouping. All matters not specifically reserved by law or the grouping statutes / articles of association to the General Meeting fall within the remit of the Management Board.
The Management Board operates as a collegial body.
The members of the Management Board are appointed on the basis of their expertise and contribution to corporate accounting for a term of four years; they are eligible for re-appointment.
The members of the Management Board perform their duties with complete neutrality and independence, acting in the general interest and for the public good.
In the performance of their duties, the members of the Management Board must exercise discretion and may not disclose any facts or information of which they have become aware, except in the context of debates and consultations within the institutions and bodies they represent for the purposes of the grouping.
The Management Board is supported in its duties by the Secretary of the Board and assisted by the Director of the CNC.
Chairman of the Management Board, member representing the Central Bank of Luxembourg (BCL)
Following the meetings of the General Meeting of Members and of the Management Board on March 23, 2026, Mr. Yvan THOMMES was elected Chairman of the Management Board of the EIG “Commission des normes comptables (CNC)” for a four-year term (renewable) ending at the annual general meeting to be held during the first half of 2030.
Yvan Thommes is the representative of the Central Bank of Luxembourg (BCL) on the CNC’s Management Board. He also participates in several working groups as an expert.
Mr. Thommes has been working at the BCL since November 2009, where he currently holds the position of Head of Internal Finance & Strategy. Mr. Thommes has a wide range of professional experience in finance and accounting. He has held various management positions in a variety of environments, including Carlyle (private equity), Vodafone (telecommunications), Goodyear (manufacturing) and Poeckes (construction).
He holds a degree in commercial engineering from the Facultés Universitaires Catholiques de Mons (FUCAM) – now UCL Mons – and also obtained a certificate in business law from the same university, as well as, more recently, the Luxembourg’s chartered public accountant qualification.
Deputy observer: Mr. Truong Son NGO
Member representing the State / Ministry of Justice (MINJU)
Following the meetings of the General Meeting of members of March 23, 2026, Mr. Daniel RUPPERT was appointed as a member of the Management Board representing the State / the Ministry of Justice. Previously, Mr. Ruppert served as Secretary of the Management Board of the CNC (2013–2026).
Mr. Ruppert is a First Class Government Advisor at the Ministry of Justice, where he as – until January 2026 – the Director of the Commercial Law Department. In this capacity, Mr. Ruppert advises the Minister of Justice on matters relating to accounting law and financial reporting.
Mr. Ruppert is also President of the Management Board of the EIG Luxembourg Business Registers (LBR).
Mr. Ruppert was previously active in the former Accounting Standards Board (2007-2013) and in the Legislative Commission – Accounting Law, previously established within the Ministry of Justice.
Member representing the "Administration des contributions directes (ACD)" (Luxembourg Direct Tax Admnistration)
Robert BLASIUS has been the representative of the Direct Taxation Administration (ACD) on the CNC Management Board since August 2021. He has also participated in several CNC working groups as an expert. Previously, Mr. Blasius had been involved in the work of the former Accounting Standards Board set up within the Ministry of Justice since 2011 as a deputy member of various working groups.
Mr. Blasius has over 20 years of professional experience in accounting and taxation. After starting his career in the accounting department of a large industrial company in Luxembourg, he joined the ACD in 2001, where he has held positions in various tax offices.
Mr. Blasius has also worked in the legislation division of the Direct Taxation Administration.
Deputy observer: Yves WAGNER
Member representing the "Administration de l’enregistrement, des domaines et de la TVA (AED)" (Registration Duties, Estates and VAT Authority)
Dominique DA COSTA has been the representative of the AED on the CNC Management Board since June 2016. Mr. Da Costa has also been participating in several CNC working groups as an expert since October 2013.
Mr. Da Costa is a graduate of the Louis Pasteur University in Strasbourg, where he obtained a master’s degree (“maîtrise”) in economics and business management.
Mr. Da Costa began his professional career at a large accounting firm, where he worked for nearly 12 years. As a former chartered accountant and member of the OEC, Mr. Da Costa has developed expertise in several areas, including accounting law, value added tax (VAT) and the fight against money laundering and terrorist financing.
Mr. Da Costa currently works for the AED, where he leads the Anti-Fraud Department as Head of Department. In this role, he is responsible for monitoring, investigating and detecting all offences relating to VAT, insurance tax, registration duties and inheritance tax. He also participates in activities under national, EU and international action programmes. In addition, he is responsible for monitoring the obligations of professionals under the amended law of 12 November 2014 on the fight against money laundering and terrorist financing.
Deputy observer: Mr. Benjamin JANS
Member representing the "Institut national de la statistique et des études économiques (STATEC)" (National Institute of Statistics and Economic Studies)
Lucia GARGANO is the representative of the STATEC on the CNC Management Board. Since 2018, she has also been a member of the Management Board of the Luxembourg Business Registers (LBR) economic interest grouping.
Ms. Gargano is a graduate of the Catholic University of Louvain, where she obtained a master’s degree in economics, specialising in pure economics.
Ms. Gargano joined STATEC in 1996 in the national accounts department.
She is currently head of the business statistics division and a member of the STATEC management committee.
Deputy observer: Mr. Georges ZANGERLÉ
Member representing the "Commissariat aux Assurances (CAA)" (Regulator of the Insurance Sector)
Thierry FLAMAND is the representative of the CAA on the CNC Management Board.
Mr. Flamand has been President of the CAA Management Committee since 1 January 2021.
He has over 25 years of experience in the insurance sector. His main areas of expertise are individual and group life insurance, mergers and acquisitions in the insurance sector, risk management in the insurance sector and pension funds.
During his career, he has gained solid experience in the insurance, reinsurance and pension sectors, with a wide range of assignments, through the positions he has held in consulting firms and insurance companies in Luxembourg, France and Belgium.
As a result of his location in Luxembourg, he also has experience with several foreign regulations and practices.
Mr. Flamand is a member of the Institute of Belgian Actuaries (I.A.B.e.) and the luxembourgish Institute of Actuaries (ILAC) and is a lecturer in ‘Insurance Regulation’ at the University of Luxembourg (Uni.lu).
Deputy observer: Mr. Marc BREDEN
Member representing the "Commission de surveillance du secteur financier (CSSF)" (Financial Sector Supervisory Commission)
Ana Bela FERREIRA is the representative of the CSSF on the CNC Management Board. She has been participating in other CNC working groups as an expert since 2014.
With a Master’s degree (“licence”) in economics and a specialised degree in management sciences from the University of Liège, Ms. Ferreira began her career in accounting in the consolidation department of a large industrial group.
In 2006, she joined the CSSF, specialising in accounting and auditing. She contributed to the establishment of the supervision of the auditing profession and participated in the drafting of various bills.
Today, she works in the Banking Regulation and Implementation department. In her role, she contributes to accounting groups and task forces for European Union public institutions, including the European Banking Authority (EBA). She is also involved in developing new disclosure requirements for non-financial information.
Deputy observer: Mr. Clément RENAC
Member representing the "Chambre de commerce (CC)" (Chamber of Commerce) – Large undertakings
Anne-Sophie THEISSEN is the representative of large undertakings members of the Chamber of Commerce (CC) on the CNC Management Board.
Ms. Theissen has been Director of Legal Affairs at the Chamber of Commerce since January 2015. She joined the Chamber of Commerce in September 2008.
Previously, Ms. Theissen practised as a lawyer in Luxembourg from 2000 to 2007 and as a lawyer in Belgium from 1996 to 2000, specialising in business law.
After obtaining a Master’s degree (DESS) in Economics, specialising in Taxation, from HEC Liège in 2001, Ms. Theissen joined the Accounting Standards Board in 2013 as a member of the Management Board and expert in several working groups. Previously, Ms. Theissen was also involved in the works of the former Accounting Standards Board set up within the Ministry of Justice as an expert in several working groups.
Member representing the "Chambre de Commerce (CC)" (Chamber of Commerce) – Small and medium-sized undertakings and financial holding companies
Christophe STEIN has been the representative of small and medium-sized undertakings and financial holding companies members of the Chamber of Commerce (CC) on the CNC Management Board since June 2017.
Mr. Stein joined the Chamber of Commerce in January 2017. He works at the “Mutualité de Cautionnement” (Mutual Guarantee Fund), part of the House of Entrepreneurship, which offers a comprehensive range of services to entrepreneurs and established business leaders. His responsibilities include general business advice, including information services relating to financing applications, and advice on subsidies and guarantees issued by the “Mutualité de Cautionnement”.
Before joining the Chamber of Commerce, Mr. Stein worked in the banking sector, as well as in the “consulting sector for SMEs”.
Mr. Stein holds a Master’s degree (“maîtrise”) in Economics, with a specialisation in Legal and Financial Engineering, from the University of Strasbourg (formerly Louis Pasteur University).
Member representing the "Institut des réviseurs d'entreprises (IRE)" (Professional Association for Statutory Auditors)
Christelle BOUSSER has been the representative of the IRE on the CNC Management Board since March 2018. She has also been an expert contributing to several CNC working groups since 2014.
Ms. Bousser is an approved registered auditor and chartered accountant in Luxembourg. She joined KPMG Luxembourg in 1997 and has been a partner there since 2011. She works as an approved registered auditor in the non-financial sector and her clients include operational and industrial companies and private equity firms.
Ms. Bousser headed the technical department at KPMG Luxembourg from 2009 to 2019 and was a member of the European technical management team of the KPMG network from 2009 to 2014. Ms Bousser is also responsible for working relations with the Luxembourg regulator in the context of the public oversight of KPMG Luxembourg. Since 2021, Ms. Bousser has been part of the management team of KPMG Luxembourg’s audit department.
Ms. Bousser is a member of the “Conseil de l’Institut des réviseurs d’entreprises” (Board of the Professional Association for Statutory Auditors), of the Technical Audit Committee and of the Advisory Committee on the Audit Profession of the “Commission de surveillance du secteur financier” (Financial Sector Supervisory Commission).
At national level, Ms. Bousser was a member of the examination board awarding the professional qualification for the profession of registered auditor in Luxembourg from 2010 to 2024.
Deputy observer: Mr. Hugues WANGEN
Member representing the "Ordre des experts-comptables (OEC)" (Order of Chartered Accountants)
Stéphane SCHIRRECKER has served as the representative of the Order of Chartered Accountants (OEC) on the CNC’s Management Board since December 2025. He also serves as an expert on the CNC’s Working Groups 1 and 3.
Mr. Schirrecker is a chartered public accountant and has been a member of the OEC’s “Accounting Law and Legislative Studies (DCEL)” committee since 2018.
Mr. Schirrecker joined Deloitte Luxembourg as an auditor in 2000 and worked in the audit department until 2006. Following this initial experience, he worked in the financial supervision team of an asset management firm, also in Luxembourg.
In 2013, he joined the “Corporate & Accounting Services” department at Deloitte Luxembourg, where he became a partner in 2020. Mr. Schirrecker leads the “Private Equity” team responsible for accounting services provided to alternative investment vehicles. He is also a leader in providing accounting advisory services within Deloitte Luxembourg’s “Accounting and Reporting Advisory” team.
Deputy observer: Mr. Bob FISCHER
Member appointed on the recommendation of the Management Board – Independent Qualified Person (PQI)
Yvan STEMPNIERWSKY is an independent member of the CNC Management Board, appointed for his expertise and contribution to accountancy as a discipline. He has also been involved in several working groups for a number of years.
Mr. Stempnierwsky is a lawyer (Of Counsel) at the law firm Arendt & Medernach, where he is in charge of the Financial Reporting & Accounting Standards practice.
He has nearly 40 years of experience in the development (negotiation of European directives and regulations, transposition into national law, etc.) and practice of accounting law (BE GAAP, LUX GAAP and IFRS), as well as in teaching this subject matter at various universities in Belgium and in the Grand Duchy of Luxembourg and in training professionals in the preparation and auditing of financial statements.
Mr. Stempnierwsky is the author of numerous publications on accounting law (BE GAAP, LUX GAAP and IFRS) as well in banking and financial law.
He holds a degree in law and economic law from the “Université Libre de Bruxelles”.
Secretary of the Board (Article 10, sub-paragraph 2)
Following the meeting of the Management Board on March 23, 2026, Ms. Olivia COLLETTE was appointed Secretary of the CNC Management Board.
Since March 2025, Ms. COLLETTE has participated as an expert in the work carried out within the various CNC working groups.
Ms. COLLETTE is a civil servant in the Commercial Law Directorate of the Ministry of Justice. In this capacity, Ms. COLLETTE advises the Minister of Justice, particularly on matters of accounting law and corporate law.
Before joining the Ministry of Justice in March 2025, Ms. COLLETTE was a lawyer with 11 years of experience in business and commercial litigation.
Director (Art. 14)
David BURBI is the Director of the CNC, responsible for the day-to-day management of the EIG and the technical oversight of the working groups’ activities. Previously, Mr. Burbi served, since 2009, as an assistant to the former Accounting Standards Board established under the Ministry of Justice and, in that capacity, participated in the reform of the CNC in 2013.
Before joining the CNC, Mr. Burbi worked for 12 years at a major firm in Luxembourg and the United States, where he held various positions in the audit, accounting, and tax departments, as well as in the technical department.
Mr. Burbi is an adjunct lecturer at the University of Luxembourg, where he teaches accounting and financial reporting as well as accounting law. He also publishes articles on these subjects and contributes to various books and journals in Luxembourg and abroad.