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Main Office

  • 11150 W. Olympic Boulevard
  • Suite 1000
  • Los Angeles, CA 90064
  • Main Number: 3109438080
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Jim Caskey, CPA


James Caskey has over 30 years experience in public and private accounting including financial management and consulting services, tax preparation and compliance services, and business management services primarily to the entertainment industry. His clients are involved in both wholesale and retail industries, real estate, entertainment and various medical related businesses. He is a Certified Public Accountant and a member of the AICPA and the California Society of CPAs.

Steve Grover, CPA


Warren Mandell, CPA


Warren Mandell is one of the founding partners of Caskey, Mandell, Karp & Block, LLP with over 25 years experience in public and private accounting. He has a wide range of accounting, tax and business management experience which enables him to provide relevant and timely advice to businesses owners and individuals. He specializes in the fields of entertainment, real estate, medical and private industry.

His experience has equipped him to deal effectively on behalf of his clients on issues related to tax planning, tax preparation, compliance and consulting services. Warren is a Certified Public Accountant who is a member of the American Institute of Certified Public Accountant and the California Society of CPAs.

David Stern, CPA


David is the co-managing partner of Caskey Mandell Karp & Block, LLP and has worked in public accounting for over 35 years.  He is a licensed certified public accountant in California

He provides various accounting, tax and business advisory services to closely-held businesses with a specialty in the fields of entertainment, medical, real estate and legal services. 

David received his Bachelors of Science degree with an emphasis in accounting from the California State University at Northridge.  During college he worked at Famous Amos Cookies in every accounting department.  After graduation, he worked for a large local CPA firm for a couple of years.  After receiving his CPA, he took off a year and traveled.  After his return, he worked for two other large local CPA firms before venturing off on his own in 1992.  He was then a partner in Wind & Stern, LLP for 5 years then was affiliated with Caskey, Mandell, Karp and Block, LLP before becoming a partner in January, 2018.

David has been published in various newspapers and he has been voted the “Best Accountant on the Westside” by The Argonaut newspaper.

David is a member of the American Institute of Certified Public Accountants (AICPA) CPA and the California Society of CPAS.

Bob Johnson, CPA

Bob joined our Firm as our resident tax-guru in January 2018 after having been the director of the tax department of a dual state (California and Nevada) CPA Firm from 1986 through 2017.  Previously, Bob had been with Arthur Andersen & Co., where he began his career, and Kenneth Leventhal & Co. (which later merged into Ernst & Young).  Bob holds a Masters in Business Taxation from the University of Southern California and has spent the better part of forty–five years in public accounting, primarily in the partnership arena and C & S Corporation taxation.  Bob also has extensive experience in personal income taxation.  Bob stands on two principles: (1) constructive and creative tax planning, and (2) timely filing of income tax returns.  Bob’s tax planning includes the traditional interim and year-end tax planning for individuals, corporations, partnerships, and trusts and their respective shareholders, partners or beneficiaries as well as estate planning.

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