Marissa Williams, CPA

Marissa Williams, CPA Assurance Director

Marissa Williams’ professional career started with Atherton & Associates, LLP in July 2009 after graduating from California State University Stanislaus. She specializes in financial statement audits, including audits in accordance with Government Auditing Standards and the Uniform Grant Guidance; employee benefit plan audits; reviews; compilations; and agreed upon procedures to improve internal controls. Marissa has led multiple engagements across a wide variety of industries including manufacturing, agriculture, healthcare and not-for-profit organizations.


Professional Designations

Licensed Certified Public Accountant in California, 2012


Professional Affiliations

Member, American Institute of Certified Public Accountants

Member, California Society of Certified Public Accountants



Bachelor of Science in Accounting, California State University, Stanislaus, 2009


Community Involvement

Board Director, California Society of Certified Public Accountants, 2013-2018
Young Emerging Professionals Committee, California Society of Certified Public Accountants, San Joaquin County Chapter
Alumni of Modesto Chamber of Commerce Leadership Modesto, 2015