Nina
Bigornia

Founder, Managing Partner

Nina is Chief Operating Officer at Graintree, where she oversees operations, technology, risk and compliance, client experience, and execution aligned with the firm’s strategic growth. She brings extensive leadership experience transforming operational platforms, with a career focused on building client-centric business models, improving productivity, and enabling disciplined, sustainable growth.

Most recently, Nina served as Senior Vice President of Private and Commercial Client Operations at Flagstar Bank, where she directed all client-facing support teams, including client services, call centers, cash management implementation, and ongoing training and support. Prior to Flagstar, she was Vice President of Process Improvement and Sales & Service at First Republic Bank, where she directed firmwide technology and operational enhancements designed to scale operations and elevate client service.

Nina studied corporate finance and accounting at San Francisco State University. A Bay Area native, she now lives in Manhattan with her dachshund and is actively involved with Chief, a membership network for senior women executives focused on community, collaboration, and leadership development.