
Warren R. Fischer
Mr. Fischer currently serves as a Senior Vice President with Aperture LLC. Mr. Fischer has almost 30 years of experience in commercial litigation and regulatory matters involving the telecommunications, energy, maritime, and agricultural industries. Mr. Fischer's professional experience includes two years in public practice with Deloitte LLP and over 10 years of managing financial analysis, reporting and forecasting processes for various multi-national corporations, and then over 25 years with QSI Consulting, Inc. Mr. Fischer is also certified as both a C.P.A. and Chartered Global Management Accountant.
Mr. Fischer’s litigation expertise centers on billing disputes, forensic accounting analyses, damages assessment, merger reviews, historical and forward-looking economic cost methodologies, management audits, and multi-state tax sourcing of income through cost of performance determination. Mr. Fischer’s practice as a management consultant includes assisting clients with business planning, forecasting, operational and jurisdictional cost analyses, and building business intelligence platforms.
Mr. Fischer is an experienced and effective expert witness who has provided expert testimony and reports in over 60 proceedings before state and federal courts, 35 state utility commissions, and other administrative agencies.
Mr. Fischer holds active C.P.A licenses in the States of Colorado and California. He earned his Bachelor of Science degree in Business Administration with an emphasis in Accounting from the University of Colorado at Boulder. He is also a member of the American Institute of Certified Public Accountants (AICPA) in the Forensic and Valuation Services Section.
Warren R.'s Expertise
Economic Consulting
Commercial Litigation
Litigation Support
Financial Forecasts
Cost of Service Analysis
Public Utility Regulation
Education
Bachelor of Science, Business Administration, University of Colorado at Boulder, 1984
Professional Certifications
C.P.A
C.G.M.A
Work Experience
Aperture, LLC (formerly QSI Consulting, Inc.), Mar. 2025-Present, Senior Vice President
QSI Consulting Inc., 2000-Feb. 2025, Chief Financial Officer
AT&T Corporation, 1996-2000, Financial Manager
AT&T Wireless Services, 1995-1996, Marketing Analyst / Planner
E. & J. Gallo Winery, 1991 - 1995, Senior Financial Analyst
Century 21 Real Estate Corporation, 1987-1991, Financial Analyst
Deloitte LLP, 1985-1987, Audit-in-Charge
Memberships
Certified Public Accountant in the States of Colorado and California
American Institute of Certified Public Accountants
Chartered Global Management Accountant
Member of the Forensic and Valuation Services Section of the AICPA
Capabilities
Expert testimony
Economic damages
Forensic accounting analyses
Due diligence
Witness training
Litigation support
Cost modeling
Cost of performance & apportionment
Operational and jurisdictional cost analyses
Building business intelligence platforms
Warren R.'s Expertise
Economic Consulting
Commercial Litigation
Litigation Support
Financial Forecasts
Cost of Service Analysis
Public Utility Regulation
Relevant Services
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