O'Connor Consulting Services
AccountingDistrict of Columbia, United States11-50 Employees
O'Connor Consulting Services is an accounting firm based in the District of Columbia that has focused on serving the not-for-profit sector since 1999. The firm positions itself as an adviser to help nonprofit organizations produce reliable financial data through disciplined policies and compliance with regulatory and grantor requirements, handling the development and maintenance of appropriate accounting procedures. Its services are aimed at identifying issues, proposing solutions, and ensuring clients have the staff or training needed to sustain effective operations. The company emphasizes interim outsourcing and staff development as a core part of supporting ongoing financial management for nonprofits. In 2025, the firm underwent a notable acquisition by Aprio, signaling a consolidation in nonprofit advisory and outsourcing services within the broader accounting industry.