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Brenan Duffy

Chief Information Security Officer at ACLU

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Overview

Brenan Duffy serves as Chief Information Security Officer at ACLU [1][3]. Duffy is a cybersecurity executive with 17+ years of experience leading security programs for critical infrastructure, Fortune 100 companies, private equity portfolios, and non-profits [2]. Prior roles include Executive Director of Offensive Security at Boston Consulting Group [4], Chief Audit Executive for IT & Cyber Assurance at GE [5], Head of Information Security at Dorilton [6], and Sr. Director of Cyber Security Assurance at Comcast [7]. Duffy also taught adjunct courses in cybersecurity at Temple University from 2017 to 2020 [7] and at Wilmington University from 2012 to 2017 [9]. Duffy holds a Master of Science in Computer Information Systems from Boston University [11] and a Bachelor of Science in Computer & Network Security from Wilmington University [12].

Profile introduction
Source excerptLinkedIn [2]

Global cybersecurity executive and CISO with 17+ years leading security for critical infrastructure, Fortune 100 companies, private equity portfolios, and high-profile non-profits. I specialize in taking fragmented, high-risk environments and building mature, intelligence-driven programs that blend offensive insight with resilient operations. Known for materially reducing real-world attack paths and blast radius while giving Boards and executives a clear, grounded view of cyber risk, tradeoffs, and the investments that move the needle.

Career history

  1. Chief Information Security OfficerSep 2024 to presentACLU
  2. Executive Director, Offensive Security2023 to 2024Boston Consulting Group (BCG)
  3. Chief Audit Executive, IT & Cyber AssuranceJan 2021 to Dec 2023GE
  4. Head of Information Security2019 to 2021Dorilton
  5. Adjunct Instructor, Cyber SecurityJan 2017 to Mar 2020Temple University
  6. Sr. Director, Cyber Security Assurance2014 to 2019Comcast
  7. Adjunct Instructor, Computer & Network SecurityMay 2012 to May 2017Wilmington University
  8. System & Data Security Specialist2012 to 2014Bank of America

Education

  1. Master of Science - MS, Computer Information Systems2014 - 2017Boston University
  2. Bachelor of Science - BS, Computer & Network Security2011 - 2012Wilmington University
  3. Associate of Science - AS, Information Technology2009 - 2011Community College of the Air Force

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