William Sissamis currently serves as Vice President of Finance at NAPEO - The National Association of Professional Employer Organizations, a position held since September 2024. Prior to this role, William worked as Controller at the Auto Care Association from April 2017 to August 2024, and held the position of Senior Accountant at The Heritage Foundation from November 2015 to April 2017. William's earlier experience includes serving as Assistant Controller at Tate & Tryon, CPAs & Consultants from March 2011 to November 2015, and as Admissions Representative at Transemantics, Inc. from September 2009 to October 2011. William earned a Master of Science in Accounting from American University, completed in 2011, and holds a Bachelor of Arts in International Studies from American University, earned in 2009.
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NAPEO - The National Association of Professional Employer Organizations
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NAPEO is the voice of the PEO industry and the source for PEO education. PEOs provide payroll, benefits and other HR services to mostly small and medium-sized businesses. NAPEO has approximately 500 members operating in all 50 states. NAPEO’s PEO members range in size from start-up PEOs to large publicly held companies. For more information about NAPEO, please visit www.napeo.org. You can also follow us on Twitter @NAPEO.