Unreasonable Mentors

Brian Reilly

Vice Chairman of Climate Tech & Energy Transition Banking within the Investment Bank at Barclays.

Brian is an Unreasonable Mentor. Brian has participated in 6 programs, including Unreasonable Impact Americas 2024, and has advised over 81 Unreasonable companies.
Brian Reilly is Vice Chairman of Climate Tech & Energy Transition Banking within the Investment Bank at Barclays. Based in New York, he led the effort, starting in September 2019, to form and build out the Climate Tech Banking team (formerly Sustainable & Impact Banking), which (i) advises and raises capital for emerging growth, climate technology companies and (ii) advises investment banking clients on their energy transition. He also is a member of the Sustainable Finance Management Team within the Corporate & Investment Bank and is Head of the Early Careers Recruiting Committee.
Brian joined Barclays from Lehman Brothers in 2008 as Head of Asset Management within the Financial Institutions Group. He was named Head of Americas Equity Capital Markets in 2010, and served as Global Head of Equity Capital Markets in 2014 until assuming his current position in 2019. 
Brian has over 25 years of experience originating and executing capital markets and M&A transactions. Prior to Barclays, he was Head of the TMT vertical within Equity Capital Markets at Lehman Brothers. Over the course of his career, he has led over 150 capital markets transactions for companies across all industry sectors.
Before joining Lehman Brothers, Brian was a corporate lawyer for Simpson Thacher & Bartlett in New York, and prior to that, he served as a law clerk for a federal judge, Chief Judge Thomas C. Platt, in the Eastern District of New York.
Brian earned his J.D. from Yale Law School and his B.A. from Yale University. He serves as a mentor for Unreasonable Impact, Co-President of the Yale Lacrosse Association, a member of the Yale School of Nursing Dean’s Leadership Council, a board member of CityLax, and a board member of Project Nyame Nsa (non-profit that builds and operates foster homes for orphans in Africa).
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