Oak Brook 312.345.6201 | Merriville 219-769-6000 pschimmel@hmscpatax.com

Tax Law

Sean E. McMahon, JD, LLM, CPA

Sean E. McMahon is a Member specializing in Tax Services. Sean serves as chairman of

the finance committee as well as a member of both the human resources committee and

the sales and marketing committee. With twenty years of public accounting experience

with a concentration in middle-market clients working at such firms as KPMG LLP,

Deloitte & Touche, LLP and Klayman, and Korman, LLC, Sean contributes invaluable

tax knowledge and service to his clients. Sean has experience in corporate, partnership,

and individual taxation, corporate mergers and acquisitions, state and local tax planning,

and family wealth and succession planning.

Sean has worked with a variety of clients, including corporations, partnerships, real estate

investment trusts, individuals, tax-exempt organizations, and trusts and estates, as well as

with a variety of industries, including real estate investors, real estate developers,

construction contractors, manufacturers, distributors, consumer products companies,

retailers, investment partnerships, mortgage brokers, and service providers. Sean’s

experience combines the technical expertise offered at a big four firm and the level of

service and commitment offered by a mid-sized firm.


LLM in Taxation – DePaul University School of Law

Juris Doctor – Duke University School of Law

Bachelor of Science in Accounting – University of Illinois at Urbana-Champaign

Professional Organizations

American Institute of Certified Public Accountants

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