A senior, independent forensic professional.

Over 20 years of experience in investigations, fraud and compliance matters across multiple jurisdictions, combining investigative expertise, operational leadership and practice development.

European context

Background

CMA Advisory was founded by Cyril Magnien, a forensic professional with more than 20 years of experience in investigations, fraud and compliance matters across multiple jurisdictions. He operates as an independent expert, providing senior, hands-on support to organisations, law firms and consulting practices facing complex or sensitive situations.

Leadership & Build-up Experience

Prior to establishing CMA Advisory, Cyril served as Associate Partner in a Big 4 and led the development of the forensic service line in Luxembourg. He built the practice from the ground up, advising financial institutions, multinational corporates and public bodies on a wide range of investigations and integrity matters. This experience combines entrepreneurial drive, operational leadership and deep technical expertise in managing high-stakes engagements.

International Background

Cyril previously worked in France, Switzerland, the UK and Africa, and has extensive experience across European and international environments. He has led and coordinated cross-border investigations involving multiple stakeholders, regulators and legal advisers across the globe — including numerous engagements in Sub-Saharan Africa, Asia, Russia and across European countries.

Approach

Cyril is recognised for a pragmatic, discreet and results-oriented approach. Clients value:

  • Direct senior involvement
  • Confidentiality
  • Clarity in complex situations
  • The ability to operate effectively in environments where judgement, independence and credibility are essential

CMA Advisory was created to offer organisations access to this level of expertise through a flexible and proportionate model.

Professional Journey

2026

Founded CMA Advisory

Established independent forensic and investigations practice in Luxembourg.

Prior

Associate Partner, Big 4 Firm

Led the development of the forensic service line in Luxembourg, building the practice from the ground up.

Prior

Managing Director, Top-Tier Boutique

Advised on complex investigations across multiple jurisdictions in Europe, Africa and Asia.

20+ Years

Cross-Border Forensic Experience

Extensive engagements across European markets, Sub-Saharan Africa, Asia, Russia and beyond.

Background & Expertise

Languages

English, French

Education

Master in Accounting and Internal Audit
Toulouse Business School
Master in Business Law, Law University Montpellier

Expertise Areas

Forensic Investigations, Fraud Prevention, Compliance, Anti-Corruption, Whistleblowing, Cross-Border Fact-Finding

Geographic Reach

Luxembourg (base), France, Switzerland, UK, Germany, Belgium, Sub-Saharan Africa, Asia, Russia & Eastern Europe, USA

What guides every engagement

Independence

Operating without conflicts of interest. Conclusions are driven by facts, not by commercial pressures.

Rigour

Structured, methodical approach to every matter. No shortcuts in complex or sensitive situations.

Discretion

Full confidentiality maintained at all times. Sensitivity to the reputational dimensions of each engagement.

Clarity

Presenting findings and conclusions in a clear, accessible and actionable way for decision-makers.