Independent Senior Advisory
Former Senior Partner at Ernst & Young for 37 years. Now serving as an independent trusted advisor to businesses navigating complex challenges, disputes, and growth decisions.
Claude C.
Bismuth
MBA · FCPA · FCA · CISA
President, Bismuth Consulting
Former Senior Partner, Ernst & Young
About Claude C. Bismuth
Bismuth Consulting is an independent consulting firm founded in January 2008, shortly after Claude C. Bismuth retired from Ernst & Young following a distinguished 37-year career — 30 of which were spent as an audit and business advisory partner.
With deep roots in Montreal's business community and a career spanning public companies, entrepreneurial ventures, and multinational corporations, Mr. Bismuth brings an unmatched breadth of experience as a trusted independent advisor.
As an independent firm, Bismuth Consulting is free from the conflicts of interest that can affect larger organizations — offering clients objective, candid assessments precisely when they need them most.
What We Do
Four decades of multidisciplinary expertise, now available as a fully independent advisor without the conflicts that large firms carry.
Over 20 years of experience delivering expert opinions in commercial disputes, class actions, and professional liability matters. Recognized as an expert in accounting, auditing, and information systems by Quebec Superior Court judges.
Learn MoreExpert participation in alternative dispute resolution processes as an independent expert or panel member. Experience in cross-border arbitrations applying Canadian and U.S. GAAP, including complex cases in Chicago and internationally.
Learn MoreIdentifying critical success factors through rigorous operational reviews. Analyzing liquidity, profitability, sales growth, and cost structure. Peer benchmarking using industry data to identify laggards and leading practices.
Learn MoreDeveloping rigorous M&A strategies: identifying and evaluating targets, applying Best of Fit methodology, and assisting in negotiation and deal execution. Aligning shareholder interests with business strategies for partnering, mergers, and divestitures.
Learn MoreWhat Clients Say
A record of delivering clarity, credibility, and results — from complex commercial disputes to strategic mandates at critical crossroads.
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.
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.
Case Study — Grantec Inc. vs. Domtar Inc. | Quebec Superior Court
Acting as expert for the Defence, Mr. Bismuth presented a rigorously substantiated evaluation of damages — assessed between $2.69M and $8.6M across various scenarios — countering the Plaintiff's initial claim of $15.9M–$16.9M. The Court chose to rely on what it described as "the more pragmatic approach" as submitted by the Defence's expert.
Our Philosophy
We aim to provide expertise that complements the Business Leadership Team — with senior-level engagement, complete objectivity, and freedom from the conflict of interest that can constrain larger firms.
Free from the conflicts of interest inherent in large multi-service firms. Our only obligation is to our client's best interest.
Assessments grounded in rigorous analysis, not advocacy. We deliver the honest perspective that senior management needs to make sound decisions.
40 years of hands-on experience across industries, geographies, and practice areas — not delegated to junior staff.
Every mandate receives personal attention from Mr. Bismuth himself — the experience and judgment you engaged is the engagement you receive.
Get in Touch
Whether you are facing a complex dispute, a strategic crossroads, or seeking an independent view on a business challenge — we welcome your inquiry.