Let's Talk

Let's Talk.

Looking for our offices? View locations.

Marc Glennon

Marc Glennon

Marc is a Managing Director with over two decades of experience in financial and professional services. He specializes in business development and relationship management for clients ranging from retail to institutional investors.

With Accordion, Marc works with the Business Development team to manage existing sponsor and portfolio company relationships as well as identify new opportunities within the Eastern Region. He is based in Accordion’s Boston office.

Before joining Accordion, Marc spent almost 17 years at GLG in Client Service, Business Development, and BD Management roles – most recently Managing Director and Head of Private Equity Business Development. During his time there, he was responsible for managing many of GLG’s largest global relationships, new business development, and driving product cross-sell opportunities.

Marc’s area of expertise is connecting people with the information they need to make the best business decisions possible. He has experience connecting private equity and portfolio company professionals with primary research, surveys, market studies, and executive introductions throughout all phases of the deal lifecycle and value creation.

Prior to GLG, Marc started his career at Putnam Investments in Boston, marketing and selling to Financial Advisors before moving to the other side of the desk and joining a large private wealth team at UBS in Stamford, CT as a Financial Advisor.

Marc graduated from Boston College with a B.S. in Environmental Geoscience.

“Attitude is a little thing that makes a big difference.” – Winston Churchill

Something You Should Know

  • Dad to two boys, assistant to the assistant coach for both kids’ hockey, baseball, and sailing teams
  • Subscribe to the quality over quantity approach to skiing with the family these days
  • Total gear geek with regard to all things boats, skis, fishing, sailboat racing


  • Multiple time winner of the annual “MVP” and “Head Honcho” awards for top GLG sales professionals
  • 10+ years as Boston office lead for the Massachusetts DCF “Wonderfund Holiday Gift Drive” supporting local children and families in need