Law firms carry financial complexity that general CFO work doesn't prepare you for: realization and leverage economics, originations credit and partner compensation, trust accounting and IOLTA compliance, WIP and AR cycles that distort cash, and a partnership governance model where every meaningful financial decision touches personal income.
Most boutique firms, multi-office practices, and specialty litigation groups do not need (and cannot justify) a full-time CFO. They do, however, need executive financial leadership: someone who sits beside the managing partner or executive committee, speaks the language of partners and administrators, and brings sector-specific judgment to the decisions that most shape the next decade of the firm.