Lionel Gendarme Partner, Advisory Luxembourg +352 45 38 78 1


Lionel is a Financial Services Partner in charge of Advisory and BPO services at Grant Thornton Luxembourg.
He has more than 20 years of experience in the banking sector in Luxembourg including 15 years in consulting. He had previously worked 8 years in various custody and private banking environments as account administrator, IT administrator, business analyst and project manager.

Lionel has an extensive experience in banking (private banking and depositary banking and custody), PFS investments firms, management companies – investment funds and insurance.
He has a strong background in management advisory, projects, banking systems, securities processing, back-office and front office operations and IT general controls.
In addition to managing Advisory activities, he leads the provision of BPO reporting services in relation to CRS/FATCA/QI, legal reporting (FINREP, COREP, BCL) and tax statements for private customers.

Lionel is specialised in management consulting (management advisory, project management, set-up of regulated entities, incl. preparation of CSSF application files), business consulting (CRS – FATCA – qualified intermediary regime – AIFM directive, securities / corporate actions / payments processing automation, banking systems implementation) and financial tax services (tax engines design, tax processing automation).



  • Lionel regularly publishes articles in the Benelux financial press on topics that relate to management consulting.



  • ABBL Securities Committee
  • Luxembourg Testing Board


  • ISTQB Certified Tester Foundation Level
  • Prince2 Foundation Level
  • Lean Six Sigma Yellow Belt
  • ITIL Foundation Level
  • Master’s Degree in Mathematics, Physics and Electronics