Bob is a nationally renowned author and speaker, presenting continuing education classes to over 100,000 tax professionals over the last 20 years all over the world. Bob is a licensed CPA (Indiana),and an IRS Enrolled Agent. Bob is also a prolific author and has published over 60 professional articles in such magazines as the Journal of Accountancy as well as many other professional and consumer publications; annually authors several tax, accounting and technology manuals; and is a regular columnist for FoxBusiness.com. As the founder of his own regional CPA firm in 1984, Bob has dealt exclusively with individual and small business financial issues for over 30 years. Bob appears regularly in the media and has been quoted extensively by numerous publications. He has recorded an extensive number of information videos, DVD’s and instructional clips available on his website at TaxSpeaker.com.

Mark Mirsky is a licensed CPA in Illinois with in-house corporate accounting experience, and has worked in both large and small accounting firms. He has a Master's in Taxation from University of Illinois, Urbana-Champaign. In 2004 Mark co-founded ROI Business Services, LLC, where he leads the Taxation and Management Advisory Services. In 2018 he founded ROI CPE, LLC to provide quality education to the CPA industry. With a focus on partnerships, S-corporations, C-corporations, and multi-state taxation, Mark also provides assistance for business startups, the acquisition and disposition of businesses, international taxation, and real estate. Mark works with businesses and organizations across the country and around the world, including manufacturing/distribution, technology and web-based, and construction companies, as well as service firms and medical practices. He also works with individuals and tax planning. Mark's background includes working in the international tax group at one of the largest accounting firms in the world, and for two middle-market firms focusing on closely held businesses, serving as a firm-wide resource for partnership and multistate taxation. He currently is teaching for Taxspeaker around the country, a former instructor for other national seminar companies. Concentrations: Tax instruction, business consulting, multi-state and partnership taxation, international tax, S-corporations, startup businesses, tax planning, individual tax, accounting and assistance with structuring sales/acquisitions of businesses.