Andrew J. Mainz

Andrew J. Mainz

Andrew J. Mainz

Senior Managing Director

Tel: +44 (0) 20 3727 1333
Fax: +44 (0) 20 3727 1007

Andrew J. Mainz is a senior managing director in the FTI Consulting European Economic and Financial Consulting practice and is based in London where he has a senior partner position. Mr. Mainz  has 40 years of professional experience.


Mr. Mainz has 40 years of professional experience, largely working on a wide variety of forensic accounting assignments and financial investigations.

Mr. Mainz has extensive expert witness testimony experience, in Court in London, Milan and Hong Kong and before arbitration tribunals in various locations. He has been deposed in New York. He has given evidence in civil and in crimial proceedings.

Mr. Mainz has been appointed as an expert determiner in a sale and purchase dispute involving the completion accounts of a large European business. 

He is currently acting as an advisor to parties involved in an expert determination relating to the application of IFRS in a set of completion accounts, with particular reference to the correct reporting of certain liabilities.

Mr. Mainz’s forensic accounting and financial investigation assignments include:

  • Expert evidence on accounting issues, accounting treatments and financial reporting;
  • Identifying damages or lost profits in many different breach of contract or warranty disputes;
  • Investigations of fraud and false accounting;
  • Tracing assets; and
  • Reviewing the value of intellectual property.

He has worked for many multinational companies and leading law firms, including some US law firms.

Some of Mr. Mainz’ more prominent assignments include:

  • Giving evidence about the correct level of charges in a test case concerning vehicle rentals;
  • Co-leading one of the teams working for the Volcker Commission; and
  • Providing an expert report in an international arbitration commenting on the loss of profits and the wasted costs suffered by a large, quoted Malaysian conglomerate as a result of the company’s inability to construct a large tourist resort on a Caribbean island.

Mr. Mainz has also worked extensively for one of the banks which lent money to the failed European food company, Parmalat.

Mr. Mainz’ career includes long-term service as a partner in a “Big 4” accounting firm. He was instrumental in setting up the forensic accounting practice in that firm. He was the founding chairman of Forensic Accounting, which was acquired by FTI Consulting in 2008.

Mr. Mainz holds an M.A. in modern languages from the University of Oxford. He is a chartered accountant, a fellow of the Institute of Chartered Accountants in England and Wales and a member of the governing council of the Academy of Experts.


200 Aldersgate Aldersgate Street London EC1A 4HD United Kingdom
TEL +44 20 3727 1000 FAX +44 20 3727 1007



Fellow of the Institute of Chartered Accountants
Member of the Academy of Experts


M.A. in Modern Languages, University of Oxford


Institute of Chartered Accountants in England and Wales

Academy of Experts

Expert Witness Institute

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