Derek Gallahan

Senior Tax Manager

Walnut Creek


Derek Gallahan, CPA, helps closely-held businesses and their owners with both tax compliance and planning to increase their after-tax cash flow, while staying within the boundaries of Federal and State income tax regulations.

Derek has broad exposure to a variety of clients and industries having started his accounting career with Ernst & Young in its New York City and Seattle offices before returning to his home state of Virginia, where he helped local businesses in the Richmond metro area.

Derek received his Master of Professional Accounting in Taxation from the University of Washington and his Bachelor of Arts from the University of Virginia. He is a Certified Public Accountant and a member of the American Institute of CPAs.

Outside of work, Derek enjoys staying active and making his kids laugh.


  • Tax Compliance, Reporting & Planning
  • Investment Partnerships

Industry Expertise:

Professional Affiliations:

  • American Institute of CPAs


  • University of Washington
    Master of Professional Accounting in Taxation
  • University of Virginia
    Bachelor of Arts