About
Claude C. Bismuth, MBA, FCPA
Chartered Accountant, Senior Business Advisor, and Independent Consultant. A career defined by integrity, deep expertise, and trusted counsel at the highest levels of Canadian and international business.
Our History
An Independent Firm Born of Big 4 Mastery
Bismuth Consulting began operations in January 2008, shortly after Claude C. Bismuth retired from Ernst & Young following a 37-year career, 30 of which were spent as an audit and business advisory partner in the firm's Montreal office.
The firm was founded on a single conviction: that the most valuable advisory is delivered by a seasoned principal who brings complete independence, no conflicts of interest, and senior-level personal engagement to every mandate.
From the first day, our focus has been to serve as experienced business advisors to businesses and their senior management teams — assisting in strategy development and implementation, and working alongside leaders facing difficult crossroads and complex challenges.
As a senior consultant, Mr. Bismuth has also assisted Federal and Quebec governments in assessing their respective investing policies aimed at helping Canadian and Quebec companies grow and become more competitive.
1965 – 1969
McGill University — B.Comm. (Cum Laude)
Accounting & Management Information Systems. Graduated with distinction from one of Canada's premier business programs.
1969 – 1971
University of Michigan — MBA, Ross School of Business
Finance, Operations Research & Management Sciences. A formative graduate education at one of the world's top business schools.
1971 – 2007
Ernst & Young — Senior Partner, 37 Years
30 years as an audit and business advisory partner. Held national director roles in E-Commerce and Aerospace & Defence, led the IT/Computer Audit practice for over 10 years, directed international services for France & Italy, and served as a frequent lecturer at industry conferences and universities.
1979
CISA Certified — One of Canada's First
Certified Information Systems Auditor (CISA) designation from ISACA — among the earliest certified in Canada, reflecting a pioneering commitment to IT audit excellence.
1986 – Present
Expert Witness & Litigation Support
Over 20 years delivering expert reports, testimony, and advisory in commercial disputes, arbitrations, and class actions. Recognized by Quebec Superior Court judges as an expert in accounting, auditing, and information systems.
2008 – Present
Bismuth Consulting — President & Principal
Founded Bismuth Consulting / Consultation Bismuth as an independent advisory practice serving businesses across industries with litigation support, M&A strategy, operational reviews, and investment assessment.
Our People
The Principal
Claude C.
Bismuth
MBA · FCPA · FCA · CISA
President & Principal
Bismuth Consulting
Since January 2008, Claude has been operating Bismuth Consulting, offering specialized services related to Commercial Disputes, Litigation Support, Arbitration, and Management Consulting to businesses operating in various industries.
Up to December 31, 2007, Claude was a senior Assurance & Advisory Business Services partner in the Montreal office of Ernst & Young. He served a number of private and public companies and also acted as the senior advisory partner on major public company audits — including Lafarge Canada, Air Liquide Canada, and Bell Helicopters-Textron.
He has provided Litigation Support and Expert Witness Testimony since 1986, on various complex accounting, auditing, and financial reporting matters. He has acted as a Consultant and Expert in cases involving a wide variety of industries, drawing on his extensive industry knowledge and sense of business practices.
A frequent guest speaker and lecturer on High Growth Technology sector issues, Claude has addressed international investor conferences on "Doing Business in Canada," and been a guest speaker at the McGill Management Institute, CATA, CVCA, Financial Executive Institute, and many other professional associations.
Education & Credentials
Academic & Professional Formation
B.Comm. (Cum Laude) — Accounting & MIS
McGill University · 1969
MBA — Finance & Operations Research
University of Michigan, Ross School of Business · 1971
Licentiate in Accounting (CA Program)
McGill University · 1972
Chartered Accountant (CA)
Ordre des CPA du Québec · 1973
Certified Information Systems Auditor (CISA)
ISACA (EDP Auditors' Association) · 1979
FCPA, FCA (Fellow)
Ordre des CPA du Québec · 1996
Associate Member, Chartered Institute of Arbitrators
London, U.K. · c. 2012
Community & Board Service
Leadership Beyond the Firm
A distinguished record of board governance, community leadership, and professional association involvement across decades.
Thallion Pharmaceuticals (TSX)
Director & Audit Committee Chair; Nominating & Governance Committee Member
Centre of Excellence for Personalized Medicine
Director & Audit Committee Chair (Not-for-Profit), 2009–
Digital Days Inc.
Director (Private Company), 2000–
Canadian Venture Capital Association
Board Member — 7 years of active service
Canadian Advanced Technology Association
Board Member; Life Member
EDP Auditors' Association — Montréal Chapter
Chairman & Founding Board Member
Centraide Montréal
Treasurer, Executive Committee and Board Member
Canadian Junior Achievement — Québec Division
Executive Committee and Board Member
Institute of Corporate Directors
Member
Italian & French Chambers of Commerce
Active member in Canada
Our Philosophy
Bismuth Consulting aims to provide expertise in areas which complement the Business Leadership Team or provide additional senior help on a project or mandate — with the objectivity and freedom from conflict that only an independent firm can offer.
Independence
No institutional conflicts. Our sole obligation is to our client's best outcome.
Rigour
Every analysis grounded in evidence, professional standards, and 40 years of experience.
Clarity
Complex findings communicated in terms that non-experts can understand and act upon.
Trust
Relationships built on candor, reliability, and sustained engagement at every stage.
Testimonials
Client Voices
Selected testimonials reflecting the quality and impact of Claude Bismuth's advisory work over the years.
"Claude has a wealth of knowledge, experience and contacts to assist in every phase of the negotiating process to ensure a smooth and timely transition. The transaction took place in a highly professional and expeditious manner. I would not hesitate to use his services in the future and recommend him to others.
"I wanted to underline your positive role in our reaching a very favourable decision on behalf of Tarkett. We appreciated your involvement in developing our strategy, identifying our stronger and weaker points, and your assistance in the preparation of our briefs and the analysis of Canadian and U.S. GAAP considerations and their impact on the amounts in dispute.
"Thank you for taking an impossible task and making it possible. I appreciate that you were an integral part of our team and for your humour in everything you do.
"I would like to advise you that in the Court case that we worked on together, we have filed your expert report. Here is to working together again on other files and continuing on this one.
"I stop to reflect on some of the people that have assisted me in this journey. Based on the quality of your friends, associates, and dedication — I want to remind you: thanks for all that you have done, and I have no doubt you will continue to do, it is very much appreciated.
Quebec Superior Court — Grantec Inc. vs. Domtar Inc.
The evaluation of damages was the subject of two expert reports and testimony. Mr. Bismuth acting on behalf of the Defendant. The Expert for the Plaintiff initially evaluated the damages to be between $15.9M and $16.9M, subsequently revised to $9.67M. The Expert for the Defence presented a more conservative evaluation between $2.69M and $8.6M depending on various scenarios. The Court decided to rely on "the more pragmatic approach" as submitted by the Defence's expert, referring in its judgement to the various scenarios and calculations of damages submitted during Mr. Bismuth's testimony.