Adrian Sierra is the Chief Executive Officer with Sierra Financial Group Ltd. (SFG). His professional experience has provided him with a wide array of knowledge in the areas of accounting, forensic accounting, litigation support, and taxation. Adrian has testified as an accounting expert witness and has prepared expert reports.


Adrian has conducted multiple engagements within the United States, Canada, Latin America, Europe, and Asia. His experience includes but is not limited to 10A and SEC investigations, asset misappropriations,
kickbacks, vendor frauds, and anti-bribery and corruption investigations, Foreign Corrupt Practice Act (FCPA) matters involving due diligence, investigations, and compliance. He works with public and private multinational clients, including Fortune 100 and 500 companies.


He frequently speaks on topics including anti-corruption investigations, comparative accounting, compliance, fraud awareness, and interviewing techniques to a variety of audiences such as to the Office of the City Treasurer – City of Chicago, the Association of Certified Fraud Examiners (ACFE), the Institute of Internal Auditors (IIA), the Practising Law Institute (PLI), the DePaul University’s graduate level Fraud Investigations course, and the University of Illinois at Urbana-Champaign’s Forensic Accounting course and Accounting Controls Systems course. He has contributed to A Guide to Forensic Accounting Investigation, by John Wiley & Sons, Inc. and The Global Economic Crime Survey 2007: South and Central America Supplement by PricewaterhouseCoopers LLP.