(Orange County, CA) Effective January 1, 2020, KSJG CPA, LLP (KSJG), a public accounting firm based in Irvine, CA, joined its practice with WithumSmith+Brown, PC (Withum), a regional CPA and advisory firm with 14 offices, 1,100 team members and annual revenue of $224M, ranking in the top 25 firms in the country. KSJG will remain at their location in Irvine, CA. Eight partners and approximately 55 other team members will be added to the Withum team roster.

“We are thrilled to form a strategic union with Withum,” says Larry Gregson, CPA, Managing Partner at KSJG. “We believe in creating personal, long-term relationships with our clients, and Withum’s business philosophy and culture aligns with this sentiment, as well.”

Withum’s Managing Partner and CEO Bill Hagaman, CPA, CGMA, is equally as excited about this union, as it expands the firm’s footprint to the West coast. “Finding the right strategic partner located in the Southern California business community is an important part of our vision for growth at a national scale,” he says. “We found the perfect match with KSJG in terms of expertise, geographic location and culture. This represents a major milestone in our firm’s history of growth and success.”

Gregson adds, “The resources Withum’s nationally-recognized team provides will bring a new breadth of services to KSJG clients, including technology and advisory services such as digital workplace solutions and cyber and information security services, as well as robust tax and international services. It’s a definite win for our clients.”

Combined, Withum and KSJG serve a wide range of industries, including construction, technology, financial and investment, healthcare, not-for-profit, manufacturing, food  & beverage distribution and service, and real estate.

About WithumSmith+Brown, PC

Established in 1974, Withum is a national top-ranking public accounting firm providing advisory, tax and audit services to businesses and individuals on a local-to-global scale. Headquartered in Princeton, N.J., Withum has a presence in major financial centers including New York City; Boston, MA; Philadelphia, PA; Washington, DC.; and Orlando, FL. Withum also is an independent member of HLB, the global advisory and accounting network. For more information, please visit www.withum.com.


Founded in 1979, KSJG is a licensed CPA firm and one of the top providers of accounting, assurance, valuation and tax consulting firms in Southern California. With offices in Irvine, CA, the firm assists companies in a variety of industries including aerospace, agriculture & farming, construction, real estate, manufacturing, wholesale distribution, not-for-profit, and healthcare.

We are now Withum.Some things are just better together.

KSJG has joined its practice with WithumSmith+Brown, one of the top 30 public accounting and advisory firms in the country.  This powerful union expands and enhances our capabilities to deliver even more robust advisory and accounting solutions to our clients.