Mark Nachbar

Overview

Mark Nachbar is a Principal in Ryan’s National Tax practice, where he has built a distinguished career providing trusted advisory services to Fortune 1000 companies. As a senior leader within the practice, Mark is responsible for identifying emerging tax trends across all areas of taxation and developing practical guidance that helps clients navigate complex state and local tax issues with confidence.

With more than 40 years of experience, Mark’s primary focus has been state income tax, though his work spans all areas of state and local taxation. He is widely respected for his technical depth, sound judgment, and ability to help organizations operate at a world-class level. Mark is a prolific author and recognized thought leader on state and local tax matters. He has written extensively on tax developments, authored two Bloomberg Tax portfolios—State Corporate Income Tax: General Principles and Income Taxes: State Tax Credits and Incentives—and is frequently quoted by national news outlets on state and local tax issues. He also plays an active leadership role in advancing the profession through education and advisory service.

Education and Qualifications

Juris Doctor, University of Illinois; Licensed in Illinois (Ryan is not a law firm .)

Bachelor of Science, Management, Tulane University

Certified Public Accountant (CPA), Licensed in Illinois (Ryan is not a CPA firm.)

Experience and Achievements

Principal, National Tax, Ryan, Downers Grove office

• Advises clients on multijurisdictional state and local tax consulting and strategy

• Supports national tax planning, controversy resolution, and compliance initiatives

National Managing Director, national tax consulting firm

National Managing Director, national business services firm

Partner, national accounting firm

Advisory Board Member, Center for Multistate Taxation, University of Wisconsin–Milwaukee

Advisory Board Member, Journal of State Taxation

Advisory Board Member, Multistate Corporate Tax Guide

Member, Multistate Tax Advisory Board, Tax Management, Inc.