Larry Ostrosky, CPA, a local Anaheim Hills resident and avid fly fisherman, is committed to delivering “the highest level of personalized service possible for clients” at his tax, accounting and business advisory firm – Larry Ostrosky and Associates. Following 10 years of local and national CPA experience, Larry took the leap of faith and launched his own practice in 1991. Since this turning point in his professional career, Larry and his team of professionals have consistently developed long-lasting customer relationships that provide clients with a security blanket of trust they can depend upon for their financial, tax, and business needs.

Larry’s philosophy of “custom tailoring” services to fit clients unique and personal needs, reflects the integrity by which he operates every facet of the business. His goals are simple – provide timely, practical, high quality solutions for clients by maintaining a constant awareness of business activities and financial requirements within the framework of the current business and tax environments.

Larry holds a BA in Business Administration from California State University Fullerton and has been a licensed CPA since 1987. Additionally, Larry is a member in good standing with the American Institute of Certified Public Accountants and California Society of CPA’s. His non-professional credentials include being a husband of 27 years, father of three, and avid outdoorsman.


Debbie Knight, second in command at Larry Ostrosky and Associates, is anything but your average CPA. Bringing over 25 years of proven finance and accounting knowledge to the practice, Debbie has unbridled energy and commitment for helping clients solve both their personal or business financial issues.

Debbie believes that deploying “basic business fundamentals” is the key to overall financial success. Her practice of openly communicating and educating clients is a strategy that’s helped her cultivate relationships and build trust with clients, treating them as if they were her own family.

Companies whose annual revenues range from $250 million to $1 billion have utilized Debbie’s leadership, strategic and tactical planning expertise to keep their revenues on track and their financials aligned with required accounting practices. Stepping well beyond the assumed role of CPA, Debbie has managed multiple mergers and acquisitions, developed workflow and process costing plans, as well as contributed to organizational restructuring for a myriad of businesses of all varying sizes and industries.

A graduate of California State University Fullerton Business Administration, she is also a California Certified Public Accountant, Member of both the American Institute of Certified Public Accountants, and the California Society of CPA’s. Additionally, she is involved with several professional organizations including the Association for Corporate Growth and Financial Executive International. Debbie is a 20 year resident of Orange County California which gives her the official rights to be called a “California Girl.” However, her nieces and nephews, who she loves dearly, prefer to call her the “Coolest, Greatest Aunt in the world.”


Gigi Oskorus, bookkeeper for Larry Ostrosky and Associates, is a resident of Anaheim and a mother of 5. She is dedicated and committed to delivering reliable and on time accounting services for our clients. Gigi has worked as a Senior Accountant for various companies in the Orange County areas.

Gigi obtained her Bachelor of Science Business Administration degree with an Accounting emphasis from California State University, Long Beach.

On a typical Saturday in June, you’ll find Gigi with her children at the little league field watching her son playing baseball as her husband John coaches.

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