WilliamsMarston LLC
Business Consulting and ServicesMassachusetts, United States201-500 Employees
WilliamsMarston LLC delivers advisory services across accounting, tax, technology, transaction support and valuation for organizations undergoing significant change. Its clients include public companies, private equity-backed firms, and pre-IPO ventures and their investors, with guidance through rapid growth, mergers and acquisitions, carveouts, spin-offs and initial public offerings, as well as complex technical accounting and corporate restructuring. The firm is positioned as a trusted adviser to CFOs, supporting mission-critical initiatives and high-stakes transactions with specialized expertise. Headquartered in Boston, the firm operates across the United States with offices in major markets such as New York, Charlotte, Atlanta, Dallas, Houston, Tucson, Denver and Southern California. Founded in 2014, WilliamsMarston is a mid-sized professional services firm that maintains a national practice. In 2025 it expanded its capabilities through the acquisition of AIT Consulting Services, a Houston-based OneStream software implementation firm.