Margaret L. Ostrowski

Senior CPA – Corporate Tax & Financial Reporting

margaret.ostrowski@finmail.com · +1 555 0147 · Columbus, OH · linkedin.com/in/margaretostrowski-cpa

Education

Master of Science in Taxation2011 - 2013
Ohio State University – Fisher College of Business, Columbus, OH
GPA 3.87 / 4.00; Graduate Tax Law Award recipient
Bachelor of Science in Accounting2007 - 2011
University of Dayton, Dayton, OH
Cum Laude; Beta Alpha Psi member

Skills

CPA License – Ohio (Active, #PA-048821) · ASC 740 Income Tax Provision · Federal & Multi-State Corporate Tax Compliance · Thomson Reuters ONESOURCE · IRC §41 R&D Tax Credits · Partnership & S-Corp Taxation · GAAP Financial Reporting · Microsoft Excel (advanced modeling, Power Query) · IRS Controversy & Audit Defense

Links

LinkedIn: linkedin.com/in/margaretostrowski-cpa · License: Ohio CPA License #PA-048821 (verifiable via state board)

Profile

Licensed CPA with 11 years of progressive experience in corporate tax compliance, ASC 740 reporting, and multi-entity financial close for manufacturing and professional-services clients. Specializes in reducing effective tax rates through proactive planning and has led audits with Big Four firms across seven fiscal cycles. Delivered $4.2M in cumulative tax savings over four years at current employer through R&D credit optimization and entity-restructuring strategies.

Work Experience

Senior Tax ManagerMar 2019 - Present
Hartwell Industries LLC, Columbus, OH
  • Directed federal and 14-state corporate income tax compliance for a $620M manufacturing group, cutting average filing cycle time by 22% through workflow automation in Thomson Reuters ONESOURCE.
  • Identified and documented $1.8M in qualifying R&D expenditures under IRC §41, generating a $378K net credit that reduced the company's effective tax rate from 24.1% to 21.6% in FY 2022.
  • Managed a team of 5 tax analysts, introduced a quarterly competency-review program, and reduced staff turnover from 40% to 12% over two years.
Tax SupervisorJun 2015 - Feb 2019
Calloway & Reese LLP, Cincinnati, OH
  • Supervised preparation and review of 80+ corporate, partnership, and S-corp returns annually with aggregate revenue exceeding $290M, maintaining a 99.4% on-time filing rate.
  • Led ASC 740 provision engagements for four publicly traded clients, coordinating with Big Four external auditors and reducing average provision-close time from 18 days to 11 days.
  • Built a reusable Excel-based deferred-tax model adopted firm-wide, eliminating an estimated 120 hours of manual rework per tax season.
Staff Accountant – TaxAug 2013 - May 2015
Meridian Financial Group, Columbus, OH
  • Prepared 150+ individual and small-business returns per season using Lacerte, achieving zero penalty assessments across two filing years.
  • Reconciled quarterly estimated tax payments for 12 corporate clients, catching a $94K underpayment error that prevented client penalties and interest.
  • Assisted senior staff in transitioning client records to a cloud-based document management system, reducing retrieval time by 35%.