John Stack joined B. Riley Securities, a subsidiary of B. Riley Financial, as senior managing director of aerospace and defense (A&D) investment banking. Stack joined B. Riley from Canaccord Genuity, where he led the firm’s U.S. A&D investment banking team.

“John’s sector experience and leadership represent a significant addition to complement our already robust aerospace and defense practice,” Andy Moore, CEO of B. Riley Securities, said. “We are excited to welcome him to our team and to enhance B. Riley’s investment banking capabilities across the A&D value chain.”

Based in New York, Stack has experience in equity capital markets, mergers and acquisitions and private capital raising. He has served as a trusted advisor to A&D industry executives, business owners and investors. Stack is especially active with defense technology, autonomy and unmanned systems and space companies, among others. Prior to his investment banking career, he held executive roles with Cessna Aircraft Company and Textron.

“B. Riley is a leading institution and respected advisor with a full suite of investment banking capabilities to address the evolving needs of the middle market,” Stack said. “I look forward to building on the company’s success and introducing the depth and breadth of B. Riley’s platform to an extended client base across the A&D industry.”