Warren Hennagin

Marcum LLP

Warren Hennagin is the California Construction Industry leader and a partner in the Irvine office of Marcum LLP. Mr. Hennagin has more than 30 years of experience with audit, accounting, tax planning, and business consulting. He was previously managing partner of a Southern California-based CPA firm where he was responsible for the day-to-day operations and strategic direction of the firm.

Mr. Hennagin is highly experienced in the construction industry, but also provides computer and management consulting services, as well as quality and internal controls to manufacturing and service-focused businesses.

Mr. Hennagin frequently speaks on accounting matters related to the construction industry, including as a regular speaker at the annual AICPA National Construction and Real Estate Conference. He continues to be involved in national construction and building-related associations on both local and national levels. Mr. Hennagin has also authored many articles for construction-related publications.

Professional & Civic Affiliations

  • American Institute of Certified Public Accountants (AICPA)
  • California Society of Certified Public Accountants (Cal CPA)
  • Construction Industry CPAs/Consultants Associations (CICPAC), Past President,
    Education Committee
  • Associated Builders and Contractors, Inc. (ABC), National Tax Committee Member
    and prior local chapter Treasurer
  • American Subcontractors Association (ASA), Chapter Accountant, Past Director
  • South California Contractors Association (SCCA)
  • Surety Underwriters Association of Southern California (SUASC)
  • Construction Financial Management Association (CFMA), Member and Holder
    of CCIFP credential

Speaking Engagements & Honors

  • Guest speaker for Software Shop Systems User’s Group; “Construction Accounting”
  • Guest speaker for Maxwell Systems User’s Group; “Construction Accounting”
  • Guest speaker for Eylar Business Systems; “Construction Accounting Automation”
  • Speaker at annual CICPAC conference; “Cash Flow” and “Taxation Update”
  • Speaker at CFMA 1994 Fall Regional Seminar; “Effective Financial Presentations”
  • Speaker at annual AICPA National Construction Industry Conference;
  • Member of Editorial Advisory Board for Journal of Construction Accounting & Taxation, published by Warren, Gorham & Lamont
  • Member of Editorial Advisory Board for CPA Construction Niche Builder, published by Harcourt Brace Professional Publishing
  • Edited Construction Controller’s Manual, published by Warren, Gorham & Lamon
  • Author of numerous published articles in national construction accounting publications
  • Honored as “The Best Accountant” in Southern California by Construction Link Magazine, December 1994, published by McGraw Hill
  • Honored as “2002 Construction Innovator of the Year” and “2014 Affiliate Award” by LA/OC Chapter of the American Subcontractor Association (ASA)


  • Masters of Science, Taxation, Golden Gate University
  • Bachelor of Arts, Business Administration, Accounting and Management Information Systems, California State University, Fullerton

Subject Matter Expertise

  • Construction Accounting & Taxation
  • ESOP Formation
  • Captive Insurance Companies
  • Business Consulting
  • Taxation

Practice Focus

  • Construction
  • Professional Services
  • Manufacturing

Understand IRC Section 199A deduction for contractors

Help construction contractors understand the pitfalls and benefits of the new IRC Section 199A deduction. Does it apply to every pass-through business? What are specific rules and regulations as it relates to this new deduction.

Learning Objectives

  1. Tax planning for pass through construction contractors

Who Should Attend?

  • Business Owners
  • CFO's

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