Fresh off receiving a private equity investment, Bend, OR-based firm Capstone Accounting and Tax has expanded into Colorado and increased its presence in Oregon by adding Keller & Mendoza CPAs and Sargent CPA.
Financial terms of both deals weren’t disclosed.
Formerly known as Capstone CPAs, Capstone Accounting and Tax locked up an outside investment from San Diego-based private equity firm Seaside Equity Partners earlier this month. Capstone said the outside capital will provide the financial and strategic support needed to accelerate its long-term growth, strengthen client service offerings, and expand its market presence through mergers and acquisitions.
- Related article: Capstone Accounting and Tax Secures Private Equity Investment
The firm didn’t waste any time, announcing deals with Vail, CO-based Keller & Mendoza and Klamath Falls, OR-based Sargent CPA on April 15. Capstone said it’s actively seeking to invest in small and midsized accounting, tax, bookkeeping, and human resources advisory practices nationally.
Keller & Mendoza CPAs
Keller & Mendoza provides comprehensive tax strategy, business consulting, business accounting, real estate investment advisory, and succession planning services to clients. Firm President Maury Keller joins Capstone as a partner and will continue leading the Vail office.

“Expanding into Colorado is an exciting milestone for Capstone,” Lance Brant, managing partner of Capstone, said in a statement. “Maury and his team have built a firm known for exceptional service, and we are thrilled to welcome them into Capstone. This partnership strengthens our ability to serve clients in a dynamic and growing market.”
Keller added, “Joining Capstone is a great opportunity for both our team and our clients. We are excited to continue providing the high-quality service our clients trust while leveraging additional resources to support their evolving needs.”
Sargent CPA
Sargent CPA has built a strong reputation for delivering strategic tax planning, business advisory, and financial services to clients in Klamath Falls and beyond.
To support this transition, the Sargent team has moved into Capstone’s local office in Klamath Falls. Sargent CPA Owner Will Sargent joins Capstone as a partner, bringing more than 14 years of experience in accounting, tax strategy, and business advisory services.
“We are excited to welcome Will and his team to Capstone,” Brant said. “This partnership reflects our commitment to expanding our reach while maintaining the high level of service and local expertise that our clients expect. Will’s leadership and experience will be invaluable as we continue to grow.”
“Joining Capstone Accounting and Tax is an exciting step for our team and our clients,” Will Sargent said. “This merger provides access to additional expertise while maintaining the personalized relationships we’ve built over the years. We look forward to continuing to serve our clients with the same dedication and excellence, now as part of Capstone.”
Founded in 2004, Capstone Accounting and Tax is a full-service accounting firm providing tax, accounting, and advisory services to businesses and individuals.
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