As part of his global forensic advisory work, Jack has acted as an expert witness in high-stakes matters in diverse judicial settings, including the International Criminal Court (ICC) and Dutch and U.S. courts.
Jack joined Kroll from KPMG, where as an equity partner he most recently led the Forensic and Regulatory practice and was responsible for cross-border investigations and disputes in Europe. He was also a member of the firm’s Global Forensic Executive Committee. In earlier roles with the firm, he was responsible for supporting the KPMG Audit base and worked with clients in a wide range of sectors, including building and construction, logistics and transportation, and financial services and law firms. In addition to advising on fraud risk management and crisis management related to fraud and misconduct, Jack developed a global fraud risk management methodology and global fraud risk database.
Prior to KPMG, Jack was a Tax Auditor for the Ministry of Finance in The Netherlands. From 1993-1996, he was a member of a European team of tax professionals charged with building up individual Eastern European countries on their tax and compliance systems in close cooperation with IMF and World Bank professionals.
Jack’s considerable experience includes acting as an expert witness in a billion-dollar energy dispute at the ICC and the bankruptcy case of an Israeli bank in New York. He also led several investigations into building and construction fraud and conducted high-profile fact-finding investigations in all sectors.
Jack earned his registered accountancy credentials from the Dutch Institute of Chartered Accountants (NBA). He also completed leadership programs from Harvard Business School and IMD Lausanne. He is fluent in Dutch and English, and speaks French and German.