Diane E. Wittenberg, CPA

Audit Partner

With Haskell & White since: 2002

Diane E. Wittenberg is an Audit Partner in the Firm’s Audit and Business Advisory Services Group and has been with the Firm since 2002. Prior to joining Haskell & White LLP, she spent 17 years with Arthur Andersen. Diane leads her teams to provide a variety of audit and business advisory services for public and private companies, as well as nonprofit organizations. Providing value beyond meeting compliance requirements is a key focus for her.

Diane has experience in multiple industries, working with companies that range from small start-ups to large, multi-national corporations. Her experience also includes special projects, including mergers and acquisitions, initial public offerings, secondary offerings and SOX compliance consulting projects. Diane’s practice also extends to the non-profit sector where she works with a wide variety of organizations ranging from community based non-profits to universities and foundations that require specialized auditing requirements to receive their government funding.

Industries & Areas of Specialty:
  • Life Science/ Bio-Pharma
  • Manufacturing, Distribution & Technology
  • Non-Profit
  • Real Estate
  • Public & Private Companies
  • Mergers & Acquisitions
  • Initial Public Offerings
  • Compliance
Industry and Professional Affiliations:
  • American Institute of Certified Public Accountants (AICPA)
  • Association for Corporate Growth – Board of Directors and Chair of Women in Leadership Committee
  • California Society of Certified Public Accountants (CalCPA)
  • University of California, Santa Barbara
  • Graduated with High Honors
  • Scored in the top 10 scores on the May 1985 CPA exam
Community Involvement:
  • Mariposa Women and Family Center – Executive Committee of the Board of Directors, Chair of the Finance Committee and Treasurer
  • Discovery Cube OC – Audit Committee Chairman

“Growing and developing our team is an integral part of our operating values and culture. By making the investment in our team, we are able to lead through exceptional client service and innovative new ways of delivering results.”

Posts by Diane Wittenberg

Five or More Employees?

This year, retirement plans will be required for California employers with five or more employees. The legislation passed in 2016 required all employers with five or more employees to offer a retirement savings account. This law also applies to nonprofit organizations. 2022 brings the final implementation phase requiring organizations with 5-49 employees to comply by Read more...

Are you ready for the upcoming audit season?

An external audit is less stressful and less intrusive if you anticipate your auditor’s document requests. Auditors typically ask clients to provide similar documents year after year. They’ll accept copies or client-prepared schedules for certain items, such as bank reconciliations and fixed asset ledgers. To verify other items, such as leases, invoices and bank statements, Read more...

4 Ways to Improve the Effectiveness of Your Audit Committee

Audit committees faced many challenges in 2021. As the economy continues to navigate a global pandemic, there are new dimensions to the oversight roles and responsibilities of the audit committees. Consider taking the following four steps to fortify your committee’s effectiveness. 1. Focus on fundamentals Check in with your accounting team and evaluate the planning Read more...