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

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.
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.
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.
Cyril is recognised for a pragmatic, discreet and results-oriented approach. Clients value:
CMA Advisory was created to offer organisations access to this level of expertise through a flexible and proportionate model.
Established independent forensic and investigations practice in Luxembourg.
Led the development of the forensic service line in Luxembourg, building the practice from the ground up.
Advised on complex investigations across multiple jurisdictions in Europe, Africa and Asia.
Extensive engagements across European markets, Sub-Saharan Africa, Asia, Russia and beyond.
English, French
Master in Accounting and Internal Audit
Toulouse Business School
Master in Business Law, Law University Montpellier
Forensic Investigations, Fraud Prevention, Compliance, Anti-Corruption, Whistleblowing, Cross-Border Fact-Finding
Luxembourg (base), France, Switzerland, UK, Germany, Belgium, Sub-Saharan Africa, Asia, Russia & Eastern Europe, USA
Operating without conflicts of interest. Conclusions are driven by facts, not by commercial pressures.
Structured, methodical approach to every matter. No shortcuts in complex or sensitive situations.
Full confidentiality maintained at all times. Sensitivity to the reputational dimensions of each engagement.
Presenting findings and conclusions in a clear, accessible and actionable way for decision-makers.
Explore our three areas of practice: investigations, anti-fraud & compliance, and independent senior support.
View Services →Over 20 years of cross-border engagements across Europe, Africa, Asia and beyond.
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