SAN FRANCISCO, CA (JANUARY 1, 2025) – SD Mayer & Associates LLP (SD Mayer), a leading full-service accounting and advisory firm headquartered in San Francisco, proudly announces its combination with Ronald Ruttenberg & Co., CPAs (RRC), a respected firm with a 20-year legacy of excellence in tax, accounting, and consulting services. This strategic partnership strengthens SD Mayer’s position as a premier service provider in the Bay Area while continuing its tradition of delivering personalized solutions to clients nationwide.
Since its founding in 2004, Ronald Ruttenberg & Co., CPAs has been synonymous with a client-first approach, offering expertise in tax, bookkeeping, consulting, and property management services. The firm’s unwavering commitment to fostering close relationships and delivering exceptional results aligns seamlessly with SD Mayer’s mission to help clients succeed in business and in life.
“This merger is an exciting chapter for both firms,” said Ronald Ruttenberg, CPA, founder of RRC. “I have always believed in providing clients with personalized, high-quality service, and SD Mayer shares this ethos. By joining forces, we are not only expanding our resources and capabilities but also ensuring that our clients continue to receive the exceptional service they deserve, while remaining local in San Mateo.”
Ronald Ruttenberg, who brings over four decades of accounting expertise, will join SD Mayer & Associates LLP in a leadership role, contributing his deep knowledge of client service and operational excellence.
SD Mayer & Associates, recognized as a “Best Place to Work” and a “Fastest Growing Private Company,” has built a reputation for innovation, comprehensive service offerings, and a client-centered approach. From tax planning and audit services to wealth management and business advisory, SD Mayer leverages its expansive network, including the global BDO Alliance, to meet clients’ diverse needs.
Steve Mayer, CPA, Managing Partner of SD Mayer & Associates, expressed his enthusiasm for the merger: “Ron and his team have built an incredible firm rooted in trust, expertise, and a true dedication to clients. We are thrilled to welcome them into the SD Mayer family. Together, we will continue to deliver the highest level of service while expanding our footprint and strengthening our capabilities.”
The merger underscores SD Mayer’s commitment to growth while maintaining a focus on community and collaboration. With offices across the Bay Area and consultants nationwide, the firm continues to serve as a trusted advisor to businesses, families, and individuals.
“By integrating Ronald Ruttenberg & Co., CPAs into SD Mayer, we are building on our shared commitment to helping clients achieve their financial goals,” Mayer added. “This merger is not just about combining expertise but about creating new opportunities for our clients, employees, and communities.”
Both firms will work closely together to ensure a seamless transition, and clients can expect the same level of personalized attention and exceptional service.
SD Mayer is a locally owned accounting firm with offices in San Mateo, San Francisco, San Leandro and Menlo Park. The San Mateo office is a 10-minute drive from Ronald Ruttenberg & Co., CPAs Burlingame office.
About SD Mayer & Associates LLP:
Founded in 2012 by Steve Mayer, SD Mayer & Associates LLP is a full-service accounting, advisory, and outsourced accounting firm with headquarters in San Francisco. The firm specializes in tax planning, audit and assurance, business advisory, wealth management, and outsourced accounting services. With a community-focused approach and access to global resources through the BDO Alliance, SD Mayer is dedicated to helping clients succeed in business and in life.
About Ronald Ruttenberg & Co., CPAs:
Established in 2004, Ronald Ruttenberg & Co., CPAs has been serving clients across the Bay Area and beyond with tax, accounting, bookkeeping, consulting, and property management services. The firm’s dedication to personalized client service and technical excellence has made it a trusted advisor for businesses and individuals for two decades.
For additional information, visit http://www.sdmayer.com or contact Greg Barber at gbarber@sdmayer.com.