Mark  CookMark Cook

Lead Tax Partner
Orange County


Mark has more than 27 years of tax experience including more than 16 years with PricewaterhouseCoopers as a tax partner, preceded by four years with Ernst & Young. His clients have ranged in size from emerging small and mid-cap companies to Fortune 500 businesses. Mark’s expertise includes corporate planning, acquisition due diligence and structuring, tax compliance, tax provision calculations, and structuring alternatives for private equity and venture capital participants.

Industries & Focus

Manufacturing and Distribution, Retail, E-Commerce, Private Equity, Venture Capital, and High Net Worth Individuals

Education & Affiliations

Mark is a Certified Public Accountant in Missouri and California and a member of the American Institute of Certified Public Accountants and California Society of Certified Public Accountants. Mark received his Bachelor of Science degree from Southeast Missouri State University with majors in Accounting and Economics, he earned his MBA from the University of Arkansas, and was appointed to the AICPA Tax Practice & Procedures Committee.


In the community, Mark contributed time to KWMU (an NPR affiliate), The United Way, Junior Achievement, and served as a Board Member of The Youth and Family Center. Mark is a Distinguished Past President and Board Member of the Downtown St. Louis Optimist Club. He functioned as a Board Member for seven years prior to serving as Co-Chairman of the Mid-America Tax Conference in 2000. Mark is a frequent speaker and writer, and regular contributing editor for the Tax Clinic column in the Tax Adviser (an AICPA Tax Division Publication).