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Asset Management Partner
Asset Management Partner
New mentor!
Member since 2026
  • Luxembourg
About the mentor

Thomas Janneau

Thomas Janneau is a senior finance professional with 25+ years of experience across global institutions (Blackstone, Credit Suisse, J.P. Morgan) and asset management startups — now offering mentorship to students and young professionals pursuing careers in investment banking, private equity, asset management, and broader financial services.

His Background

Thomas began his career at KPMG Audit in Luxembourg, then moved to Ernst & Young Corporate Finance in Paris before returning to Luxembourg to join J.P. Morgan, where he helped set up the Private Equity & Real Estate fund administration business.

In 2011, he transitioned to the "other side of the fence" — working within asset management firms. Rather than specialize in one function, he structured his career as a generalist, taking on roles across portfolio management, finance, operations, compliance, and distribution. This breadth has given him a holistic view of the asset management value chain — and taught him the flexibility and adaptability he now considers essential for today's finance landscape.

Since then, he has held senior roles at:

  • ALTAFUND (CFO) — a value-add real estate manager
  • KARTESIA (CFO / Approved Person for Portfolio Management) — a pan-European private debt manager
  • EUROPEAN CAPITAL PARTNERS (CFO / COO / CCO / Approved Person) — where he led a successful CSSF inspection
  • BLACKSTONE (Approved Person — Head of Compliance and Distribution) — set up their Luxembourg distribution team, supported $3–4bn in fundraising
  • CREDIT SUISSE (Approved Person — Head of Portfolio Management, Operations, Distribution) — oversaw 80+ clients, 200+ sub-funds
  • VAULT AM (Approved Person — Head of Portfolio Management, interim COO) — built the function from zero, executed €80M in transactions with a 94% approval rate

In 2024, Thomas founded ARMAGNAC CONSULTING, providing governance, compliance, and strategic advisory services to financial sector clients. He also developed a delicatessen venture from concept through business plan — ultimately deciding not to launch — and has written a 700-page sci-fi novel exploring AI, currently in development.

His Coaching Style

Thomas is direct, practical, and focused on what actually moves the needle. Whether mock-interviewing, reworking a CV, or mapping out a student's next career step, his goal is honest feedback that prepares for the real world — not textbook answers. He has hired people, sat on the other side of the table, and knows what firms really look for.

Education

  • Master's in Management (MiM), EM Lyon Business School — 2000
  • MSc in Wealth Management, University of Luxembourg — 2018

Languages: French (native), English (fluent), German (intermediate)

Expertise
  • Asset Management
  • Consulting
  • Private Equity
  • Venture Capital
  • Private Credit
  • Real Estate
  • Investor Relations
What is WSO Academy?

Intense 12-week program to dramatically improve your odds at landing a high finance offer.

  • Lifetime access to exclusive networking resources and support community to help you land interviews.
  • 300+ hours of courses to train and polish your skills to help ace your interviews.
  • Direct calendar access to our most helpful 120+ Head Mentors.
Why Anonymous?

Some of our mentors are forced to be anonymous due to firm policies or personal preference. Anonymity allows us to i) source the best mentors from the top companies in the world ii) allows them to be honest and give you amazing insight into the industry and firms.

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