Marissa Williams, CPA

Marissa Williams, CPA Assurance Partner

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, construction, agriculture, healthcare, and not-for-profit organizations.



Professional Designations
Licensed Certified Public Accountant in California, 2012
Certified Fraud Examiner, 2021


Professional Affiliations
Member, American Institute of Certified Public Accountants
Member, California Society of Certified Public Accountants
Member, Association of Certified Fraud Examiners


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, 2013-2018
Alumni of Modesto Chamber of Commerce Leadership Modesto, 2015
Audit and Personnel Committee, Escalon Christian Reformed Church, 2019-present


Hobbies and Interests