Hector  Sierra

Hector SierraHe | HimChief Financial Officer

P 312.670.7444 | F 312.670.8301

Hector Sierra is the firm’s Chief Financial Officer. With more than 20 years of experience in professional services and Fortune 500 firms, he is skilled in overseeing the overall accounting process, developing and implementing financial processes, building strong teams and implementing operational best practices.

Prior to joining ORBA, Hector held similar positions at professional services firms where he was responsible for finance, operations, facilities management and process improvement.

Hector is currently a member of ORBA’s Diversity, Equity and Inclusion Committee.

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Firms News


ORBA Named on America’s Best Tax and Accounting Firms 2023 List by Forbes
ORBA, one of Chicago’s largest public accounting firms, has been named on the Forbes list of America’s Best Tax and Accounting Firms 2023. This award is presented by Forbes and Statista Inc., the world-leading statistics portal and industry ranking provider.

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seminars & events


ORBA will gladly provide you with hard copies of the useful guides listed below. Select which guides you would like to receive and submit the form below.

  • Tax Pocket Guide
  • Tax Planning Guide
  • Records Retention Schedule
  • Auto, Travel & Business Log

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Forward Thinking
Forward Thinking