AICPA Expert Witness Skills Workshop 

HKA is excited to announce that Partner David Duffus will serve on the faculty of the AICPA Expert Witness Skills Workshop during the annual AICPA Forensic & Valuation Services Conference. During the multiday workshop, participants will learn how to combine confidence, credibility, and authority with a command of the courtroom to serve as an effective expert witness. Sessions are available for both Economic Damages and Business Valuation Workgroups.  

Before the in-person event, David will present during the required Pre-Event Webcast: Overview of Expert Reports, Deposition, and Trial on October 8, 10:00–1:30 PM MT, and participate in the Economic Damages Case Study Workgroup and Meet & Greet (virtual session) on October 15, 11:00–1:00 PM MT, which is required for those assigned to Economic Damages. When the three-day conference kicks off in Aurora, Colorado, on October 27, he will help lead mock testimony for those participating in the Economic Damages Workgroup.  

With a nearly 1:1 student-to-faculty ratio, the workshop is an ideal environment for participants to practice their presentation and communication skills with seasoned practitioners serving as expert witnesses, lawyers, and judges.  

Attending this highly interactive and informative workshop will benefit experienced expert witnesses, first-time testifiers, ABV and CFF exam candidates, and general practitioners.  

Register:  AICPA Expert Witness Skills Workshop | Conferences | AICPA & CIMA 

David Duffus, Partner 

David is a forensic accountant with over 30 years of experience across multiple industries. He has been retained as an expert on more than 250 occasions and has testified as an expert at deposition, trial, and in alternative dispute settings more than 120 times. He has acted as an expert for disputed values of up to $275M and for project values in excess of $300M. He has also served as an arbitrator or neutral accountant in post-acquisition and valuation-related disputes.  

Since 1992, David has specialized in working on complex litigation services, forensic accounting, and valuation services assignments for businesses ranging from startup entities to Fortune 100 companies. In addition to working extensively with counsel through all phases of the litigation process, he has provided expert witness and deposition testimony in state and federal courts and alternative dispute settings.  

David is a Certified Public Accountant (CPA), a Certified Fraud Examiner (CFE), Certified in Financial Forensics (CFF), and Accredited in Business Valuation (ABV). He is a member of the American Institute of Certified Public Accountants, the Pennsylvania Institute of Certified Public Accountants, and the Association of Certified Fraud Examiners. David was recently named as one of Forbes’ 2025 Americas Top CPAs for Valuations.