Professional Outsourcing Solutions, Inc (POSI)

Professional Outsourcing Solutions, Inc. (POSI) gives businesses a single, experienced partner for the financial back-office work that consumes time without generating revenue. Based in Torrance, California, this accounting and payroll outsourcing firm handles the operational functions that small businesses and international companies expanding into the US market cannot afford to do poorly, but often cannot justify staffing full-time. For companies looking for a reliable back-office BPO partner in the USA, POSI brings CPA-firm rigor to every engagement. POSI operates through three legally distinct entities, each focused on a specific service area. Manages day-to-day accounting operations. Payroll Outsourcing Solutions, Inc. Handles payroll preparation and monitors shifting labor law requirements. POSI Accountancy Corporation, a California-licensed CPA firm, covers tax returns and attestation services. This structure gives clients access to a full range of financial back-office outsourcing under one coordinated relationship, with licensed professionals accountable at each layer. The firm also supports companies through the full process of entering the US market, from corporate registration through ongoing accounting operations. A significant part of the client base consists of Japanese companies establishing or growing a US presence, as well as small businesses that need professional-grade financial operations without the overhead of in-house staff. Across its history, POSI has served trading companies, auto parts manufacturers, general manufacturers, distributors, and advertising agencies, among others. The leadership team is drawn from major public accounting and international payroll backgrounds. CEO Yoshimasa Hotta, CPA, is a former senior manager at Deloitte and holds CPA licenses in California, New York, and New Jersey. President Mayet Alegria brings experience from Shaw & Shaw and Zurich Payroll Solutions. President of Accountancy Masaki Shimomura, CPA, previously ran a multi-million-dollar international CPA firm with offices in New York, Los Angeles, and Tokyo. The firm traces its institutional roots to a CPA corporation founded in 1992, which means the professional habits and attention to accuracy are built into how the organization operates. To learn more about how outsourcing your back-office accounting and payroll functions to a CPA-led team can free up the bandwidth you need, visit posiusa.com or reach out directly to discuss your business needs.