Principals Mark Keegan and Tony Donato of Keegan & Donato Consulting have served as expert witnesses for both plaintiffs and defendants in a wide variety of advertising and marketing cases throughout the U.S. We can deliver intelligence quickly and within a wide range of budgets.

Keegan & Donato Consulting provides a complete suite of services, including consulting on litigation strategy, consumer research studies, expert reports, expert witness testimony in trademark and trade-dress litigation, expert witness testimony at deposition and/or trial, and critique and rebuttal of opposing parties’ surveys when applicable.
Choose a Qualified Expert
There are several criteria to consider when selecting the most appropriate expert for your case, but experience is one of the most important factors. The expert should have the right educational background and experience in being deposed and testifying at trial.
Mark Keegan has consulted for more than a decade on litigation issues such as marketing, international business, and consumer studies for Lanham Act claims, and formulating complex case strategies. He is an AMA Professional Certified Marketer and has worked with top brands as a marketing strategist helping to position them in the market and create innovative online advertising solutions. Mr. Keegan holds a law degree from Brooklyn Law School and is licensed to practice in Connecticut and New York.
Tony Donato has consulted in complex litigation matters involving intellectual property, consumer behavior, and marketing cases covering trademark, patent, copyright, advertising, consumer surveys, business ethics, business damages, and other issues. He offers clients a strong analytical background and a wide range of experience in research, survey design & execution, strategy, data analysis and case management. Mr. Donato received a Master of Public Policy degree from Georgetown University.
The firm provides services in these and other areas:
- State-of-the-art survey design, implementation, and presentation
- Full-service data gathering and reporting
- Expert witness testimony on consumer survey, marketing and economic issues
- Damages and forensic economic analysis
- Collaboration on complex commercial litigation issues
- Pilot studies and exploratory research
- Advice on deposition and trial questioning of opposing experts
We have partnered with leading firms across the nation, such as Blood Hurst & O’Reardon LLP (San Diego), Notaro, Michalos & Zaccaria PC (New Jersey), Ropes & Gray LLP (Washington, DC), and SmithAmundsen LLC (Chicago), on litigation surveys that have been accepted as evidence in matters involving a broad range of products and services.
If you need expert witnesses because the facts and issues of your case are not easily understood or a court would benefit from empirical evidence related to relevant issues in the case, Mr. Keegan and Mr. Donato have testimony experience in a number of high-profile cases involving consumer behavior and trademark infringement. Contact us today at (914) 967-9421 to explore our wide range of services.