Firm Adds Mark F. Wille’s CPA Practice, Expanding its Presence in California

JLK Rosenberger welcomes Mark F. Wille, Certified Public Accountant, a Professional Accountancy Corporation, and his team to the firm effective November 1, 2022. The addition expands JLK Rosenberger’s presence in California and industry specialties, as well as increasing the firm’s team of hands-on, problem-solving professionals.

“Mark and his staff have a long history serving the local community, and we’re delighted to have them join our team. The combined expertise of our two firms, along with JLK Rosenberger’s membership in PKF International, provides clients with the knowledge and resources of a national and global network while still providing the personal touch of a local firm,” explains Mike French, managing partner for JLK Rosenberger.

The Wille firm has been consulting and advising companies and individuals with a high-touch approach for over three decades. They serve developers, bankers, and the real estate, mortgage, construction, and service industries. Mark is also a featured educational speaker on various subjects for the California Society of CPAs.

“We joined JLK Rosenberger because they care about their clients. They treat each client according to their individual needs. This matched our practice model, and with their combined resources, it was the perfect fit,” said Mark Wille.

JLK Rosenberger, LLP has been in business for over 48 years and provides practical, timely solutions and individual, hands-on attention to clients. Both firms have a similar philosophy, working side by side with clientele.

About JLK Rosenberger LLP
JLK Rosenberger is a full-service Certified Public Accounting firm with offices in Irvine and Glendale, California and Dallas, Texas. We are ranked as the 10th largest insurance practice in the United States. We are also known for our expertise in construction, manufacturing, non-profit industries, and with professional athletes. Visit us at