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Mary Ann Hallemann

Chief Financial Officer

St. Louis
314 552 6270 direct

Mary Ann has served as Thompson Coburn's Chief Financial Officer since joining the firm in 1980.

Over that time, Thompson Coburn has grown from a 50-attorney firm with annual revenue of less than $10 million to a nearly $200 million firm with 380 attorneys — and 750 total employees — dedicated to serving clients across the country. Mary Ann has been instrumental in not just maintaining the firm's financials but actively improving business processes across all firm operations.

Mary Ann directs a 35-person business office team of highly experienced CPAs and degreed accountants who manage all of the firm's accounting functions, including budgeting, financial reporting, accounting, taxes, payroll, billing, and risk management. She has led the firm through seven successful mergers and expansions into new markets in Chicago, Washington, D.C., and Los Angeles. Before, during, and after these expansions, Mary Ann's team handles the integration of people, processes, and various administrative systems. She emphasizes front-end planning so the firm can achieve complete integration at and provide a seamless transition for clients.

Mary Ann is also part of the business team that helps transition lateral attorneys so attorneys can continue to serve their clients without interruption. Thompson Coburn's business office works closely with clients who have specific billing requirements, including submitting bills and legal budgets through eBilling vendors.

A 2016 honoree for the St. Louis Business Journal's CFO of the Year, Mary Ann's experience and guidance has played a major role in maintaining Thompson Coburn's solid financial footing — including consistent profitability and no debt — during a period of dramatic economic changes for the legal industry.

Certified Public Accountant, Missouri (1979)