KS&Co
KS&Co is the choice that offers Big 4 expertise with a personal touch.

Our Team

Ian D. Hornstein

Senior Manager - Tax

Email Ian
949.270.7829

6201 Oak Canyon Drive
Suite 200
Irvine, CA 92618

Ian began his public accounting career in 2002.  He joined KS&Co in 2007 and was promoted to Tax Manager in December 2008.  Ian’s experience includes a strong technical background in accounting, tax preparation and audit.  Ian specializes in tax return compliance, tax planning, IRS representation, wealth management and consulting for high net worth individuals and their closely held entities.  He also maintains strong client relationships by providing a high–quality work product and exceptional client service. 

Prior to joining KS&Co in 2007, Ian served as a Staff Accountant and was promoted to Senior Accountant in the Audit department at Deloitte, LLP in Orange County.  There he gained valuable experience working on various types of financial audits and, in 2005, became a California Certified Public Accountant.  After working at Deloitte for three years as an auditor, Ian worked at a small firm in their tax department in Orange County.  There Ian gained a solid foundation in preparing and reviewing various types of tax returns.  

Ian was born and raised in Orange County.  He attended the University of Southern California and in 2002, obtained a Bachelor of Science degree, majoring in Accounting.  In order to offer full financial advisory service to his clients, Ian obtained licensure as a Registered Securities Representative (Series 7 and 66). 

 University of Southern California - BS, Accounting

Our Locations

Contact Us
  • Seattle

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    Smith Tower
    506 Second Avenue
    Suite 630
    Seattle, WA 98104

    Phone: 206.496.1515
    Fax: 206.496.1516
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    Email Us | Map
  • Portland

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    U.S. Bancorp Tower
    111 SW Fifth Avenue
    Suite 1850
    Portland, OR 97204

    Phone: 503.963.4720
    Fax: 503.963.4730
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  • Irvine

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    6201 Oak Canyon
    Suite 200
    Irvine, CA 92618


    Phone: 949.250.3900
    Fax: 949.250.2956
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    Email Us | Map
  • San Diego

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    12750 High Bluff Drive
    Suite 160
    San Diego, CA 92130


    Phone: 858.465.1510
    Fax: 858.465.1511
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