RINA is a regional full service accounting and consulting firm with offices located in San Francisco, Oakland, and Walnut Creek, California as well as Bellingham, Washington. RINA serves closely-held businesses and their owners, high net worth individuals and families, and many not-for-profit organizations and private foundations. RINA is one of the leading independent accounting firms in Northern California and among the largest in the Greater Bay Area.

Our team is made up of over 80 Certified Public Accountants and paraprofessionals. We attribute the success and growth of our practice to the talent and expertise of our people. By focusing on the needs of our clients, our team can provide proactive ideas and solutions to assist them in achieving their business and financial goals.

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Who We Are

RINA has been recognized by Inside Public Accounting as one of the top firms in the Human Resources category for a combination of low staff turnover and greater training opportunities. This category represents the most stable, people–oriented firms with a focus on work-life balance. We have also been listed as the Top 100 Accounting Firms to Work For in the country and recognized by the San Francisco Business Times as one of the Best Places to Work in the Bay Area.


RINA’s practice was founded in 1946 by Leo Helzel, an Oakland attorney and CPA, in a small office near 14th and Broadway. To augment his income from Leo B. Helzel & Company, he taught intermediate accounting at Golden Gate College. He hired Bob Nolt who was his best student at the time, and soon after, hired Paul Ida...

Who We Serve

Our clients do business in many diverse industries such as franchising, manufacturing, retail, real estate, wineries, distributing - importers/exporters, professional services,construction, technology, agriculture and farming, hotels and resorts, transportation and wholesalers to name a few.


Read what our clients are saying about our Accounting Services at RINA

Community Involvement

Our Stockholders and Staff serve on boards and committees of many community organizations including the Rotary, Fremont Chamber of Commerce, Soroptimist International, East Bay Community Foundation Advisory Board, Food Bank of Contra Costa and Solano, Lindsay Wildlife Museum and Oakland's Family Center. Their dedicated service is a reflection of their commitment to the communities in which they live and work. At RINA, we support and encourage these charitable efforts that benefit so many good causes.

MGI Worldwide

RINA is a member of MGI Worldwide, a Top 20 international accounting network of independent audit, tax and accounting firms, which brings together the expertise of some 6,000 professionals in over 300 locations around the world. Our membership enables us to keep abreast of important new developments, while providing a seamless international service to any of our clients looking for support abroad. Through MGI Worldwide, our firm benefits from connections with people we get to know and trust in all corners of the globe. We can help you and your operations with a quick phone call to one of our colleagues or a complete service offering – whatever you need to make your international business a success. MGI Worldwide is a quality controlled network and, like all member firms, we are subject to review of our quality assurance systems and procedures against international standards. For more information on MGI Worldwide visit www.mgiworld.com.

Foreign Languages

Recognizing the diverse, dynamic nature of today’s business world, RINA offers you the ability to contact us directly in many languages.