News March 9, 2026

Withum Celebrated New Orange County Office With An Open House

Withum hosted a community Open House at its Orange County, CA, office located at 200 Spectrum Center Drive, Suite 1700, on February 5, 2026. The event welcomed over 200 guests to the Irvine locale for an evening of connection, conversation and celebration.

Withum team members, clients and local community associates, including representatives from the City of Irvine, the County of Orange and the Greater Irvine Chamber of Commerce, gathered in affirmation of the collaborative spirit that defines the Irvine business community.

The space, which officially opened in December 2025, offered guests sweeping panoramic views of the region as they toured the thoughtfully designed team collaborative spaces, modern amenities and community spaces that echo Withum’s culture and values. The striking backdrops of the Irvine business hub, Orange County canyons, San Joaquin Hills, Saddleback and San Bernardino Mountains and downtown Los Angeles mirrored the evening’s energy.

Amid networking, guests enjoyed live music and delicious cuisine and took home custom Withum drinkware and locally sourced beer. The event’s highlight was a ribbon-cutting ceremony, including the presentation of several Certificates of Recognition and Celebration, honoring Withum’s relationship with the region and its leadership.

“Remaining in the heart of Orange County’s business hub, our Irvine office continues to position Withum close to the industries and innovators driving our region forward. Our move to a larger office reflects our continued commitment to growth in Southern California. We appreciate the community celebrating with us and sharing in our excitement for what the future holds.“
Ken Johnson, Partner-In-Charge of the Orange County Office

Learn more about Withum’s Orange County office.

Featured News

View All News

Chris Passmore Named Top Leader on Los Angeles Business Journal List for Fourth Consecutive Year

As partner-in-charge of Withum’s Los Angeles office, Chris plays a pivotal role in the Firm’s growth on the West Coast. With nearly 25 years of experience in the profession, he specializes in assurance and business consulting services to emerging and middle-market companies. In addition to serving technology companies and professional services firms, Chris holds an advanced-level certificate in 401(k)…

Kerra Diener Named as 2026 Los Angeles Business Journal Top 100 Accountant

Kerra Diener is a partner in Withum’s Los Angeles, CA office, advising multinational and multistate businesses on complex federal and state tax matters. Known for her specialized technical depth, she helps corporate and private clients across industries, including industrial and consumer products, real estate, theatre and entertainment and cannabis, with expertise spanning tax planning, compliance, M&A and consulting. The accolade…

CalCPA Names Withum Leaders to 2026 NorCal Top 50 Accountants

Top 50 Accountant Honorees at Withum Brandon Yip Brandon Yip is a partner who leads Withum’s Technology and Emerging Growth Services Team in the San Francisco Bay Area. He focuses on advising public and private companies on audit, regulatory and transactional matters while helping innovation-driven organizations scale. Deeply connected to Northern California, he supports the region’s technology and life sciences ecosystem…