Lumsden McCormick CPA is an accounting firm based in Buffalo, NY, serving clients through a broad mix of audit, tax, advisory, and financial services. Its tax work includes business tax, individual tax, family wealth and estate planning, retirement planning, international tax services, cross-border taxation, SALT, R&D tax credit, cost segregation, and tax-exempt organization support.

The firm also lists advisory services such as outsourced accounting, forensic accounting, business valuation, litigation support, succession planning, transaction advisory, and accounting software implementation. Its audit and assurance services include audit, review, compilation, internal audit, employee benefit plans, agreed-upon procedures, revenue recognition, client accounting services, SOC reporting, and IT audits and assurance.