John Treiber is the Chief Risk Officer of Deloitte & Touche LLP, the U.S.-based audit firm of the global Deloitte Touche Tohmatsu Limited network. As the Chief Risk Officer, one of John’s principal roles is to monitor audits where compliance and risk issues have arisen, and he oversees the response of Deloitte U.S. auditors to Section 10A issues. 

Karyn Lewis is a Managing Director in the National Office Fraud Risk Center of Deloitte & Touche LLP. She is responsible for collaborating with auditors and clients to identify, assess and respond to fraud risks.  Karyn has spent over 20 years providing forensic accounting services.  She has led and conducted a broad range of corruption, forensic accounting and financial fraud investigations for public and private companies, government agencies, and private individuals. 

Michael Scanlon is a partner in the Washington, D.C., office of Gibson Dunn. He serves as Co-Chair of the Accounting Firm Advisory and Defense Practice Group, as well as a member of the Securities Regulation and Corporate Governance and Securities Enforcement Practice Groups. Michael's practice includes assisting companies in conducting Section 10A investigations and advising them on working with their auditors. He also represents auditors before the SEC and PCAOB.

David Ware is a partner in the Washington, D.C., office of Gibson Dunn. He is a member of Gibson Dunn's Accounting Firm Advisory and Defense, Securities Enforcement, White Collar Defense and Investigations, and Securities Litigation Practice Groups. David handles internal and regulatory investigations, including DOJ, SEC, and PCAOB investigations, for public companies and auditors. From 2012 to 2018, David was an enforcement attorney at the PCAOB, rising to the position of Associate Director.