Mark Nathanson

Mark Nathanson, CPA, brings 35+ years of public accounting experience to his role as Trust Administrator at The Q Companies. With a BS in Accounting from the University of Missouri-Columbia, Mark is a seasoned tax strategist for high-net-worth individuals, trusts, and business entities.

Beyond his trust administration work, Mark serves as an outsourced CFO to small and middle-market companies nationally, providing fractional financial leadership that draws on decades of public accounting expertise. This breadth of experience gives him unique insight into both individual and corporate tax planning.

As Trust Administrator, Mark oversees the financial reporting, tax filing, and compliance requirements for client trusts across The Q Companies portfolio. His deep understanding of trust taxation, including the nuances of Installment Sale Trust accounting, makes him an essential partner in the organization's tax optimization strategies. Based in St. Louis, Missouri, Mark's decades of experience span individual, corporate, and fiduciary tax planning.