Matthew J. Siegel, CIPP/US


Matt focuses his practice in the areas of cyber and technology risks, privacy compliance, commercial litigation, and insurance coverage. A certified information privacy professional (CIPP/US), Matt co-chairs the firm’s Privacy, Data and Cybersecurity Industry Team and is a member of the Technology Committee.

Matt has counseled clients on the evaluation of data privacy risks, responses and solutions, and he serves as a breach coach, providing analysis and advice to address data breach events, including forensics, notification pursuant to federal and state laws, credit monitoring, and public relations issues. In addition to breach response and privacy compliance, Matt has counseled insurers on the underwriting and coverage issues arising under cyber-risk policies. Matt has also represented a wide variety of clients, including insurers, contractors, product manufacturers, and individuals, and concentrates his practice on complex litigation matters, including prosecuting and defending first- and third-party insurance coverage claims, construction claims, and commercial disputes. 

Outside of the office, Matt is an active member of the community. He is the former vice president of the board of the Support Center for Child Advocates, a nonprofit organization that represents abused and neglected children in Philadelphia. He also serves as chair of the firm's child advocacy practice group and handles several cases for the Support Center. He has lectured at the center’s training program on several occasions, co-chairs the agency’s Volunteer Committee, and was named one of its Distinguished Advocates in 2006. Matt is also a former member of the board of directors of the Jewish Relief Agency, a nonprofit agency that provides food relief to thousands of local citizens in need.

Matt received his Bachelor of Arts in English from Colgate University in 1995. He earned his law degree, cum laude, at Temple University Beasley School of Law in 1998, where he served as an articles editor for the Temple Political and Civil Rights Law Review and was awarded the Barrister Award for achievement in the field of trial advocacy.



Cyber Law Monitor

Following current trends in cyber, privacy, and data security law.


Matthew Siegel Named the Support Center for Child Advocates Volunteer of the Month

November 05, 2021

Cozen O’Connor is pleased to announce that Matthew Siegel, member of the firm’s Commercial Litigation Department, has been named the Support Center for Child Advocates Volunteer of the Month

Privacy & Digital-Rights Experts Worry …

April 08, 2020

Matthew Siegel was quoted on Satoshi Nakamoto Blog discussing how countries are using mobile phone tracking to help fight pandemics, and the privacy side behind this.

Zoom's Sudden Rise Presents Test For New Calif. Privacy Law

April 03, 2020

Matthew Siegel was quoted in a Law360 article discussing how Zoom shares and secures personal data.

Matthew Siegel Named to the Rutgers University Cybersecurity Certificate Program Advisory Board

June 14, 2019

Matthew Siegel, a member of Cozen O’Connor’s Privacy & Data Security practice, was named to the Rutgers University Cybersecurity Certificate Program Advisory Board.

Cyber Security Insurance Coverage Issues Presentation

April 24, 2017

Joseph Gerber and Matthew Siegel were invited to present to two Insurance Contact classes at Temple on Cyber Security.


Biden Administration’s Voluntary AI Safety Agreement [Cyber Law Monitor Blog]

October 05, 2023

The Biden administration announced that it brokered a voluntary agreement with several of the biggest technology and artificial intelligence (AI) companies. The agreement, available here, has the companies taking a number of actions intended to encourage safe, secure, and trustworthy development...

SEC Adopts Final Rules on Cybersecurity Risk Management, Strategy, Governance and Incident Disclosure

July 27, 2023

Cozen O’Connor’s multidisciplinary Technology, Privacy & Data Security practice discusses the new rules, their reporting requirements, and when they go into effect.

Statement of Work Can Make or Break Discoverability of Data Breach Report [Cyber Law Monitor Blog]

September 02, 2021

A recent decision from a federal court in Pennsylvania highlights the importance of a carefully crafted statement of work (“SOW”) when commissioning an investigative report in response to a data security breach. A convenience store chain recently learned this lesson the hard way when it was ordered...

Indiana Supreme Court Refuses to Hold Commercial Crime Policy Covers Ransomware Attack [Casualty Coverage Chronicle Blog]

June 30, 2021

Typically, comprehensive cyber insurance policies, rather than commercial crime policies, respond to claims of data breach and other cybercrimes. With the rise in hacking and ransomware attacks worldwide, businesses that may have chosen not to purchase cyber insurance may find themselves without...

Does the CCPA Apply to Financial Institutions? [Cyber Law Monitor Blog]

April 07, 2020

Despite the global pandemic, the California Attorney General will begin enforcing the California Consumer Privacy Act on July 1 as planned, so even in this new work-from-home environment, businesses must continue to work towards compliance and resolve any open issues. One question we've been asked...

Cybersecurity Best Practices in the Remote-Working Environment [Cyber Law Monitor Blog]

March 31, 2020

In the wake of the COVID-19 crisis, much of the workforce has shifted to working remotely, with many workers operating out of makeshift "offices" they created in their homes with little or no warning. Along with this remote work comes an increased cybersecurity threat. We recently issued a...

Cybersecurity Challenges for Companies in the Wake of the COVID-19 Crisis [Alert]

March 26, 2020

Matt Siegel gives companies seven tips they should keep in mind as their employees try to do from home what they would have otherwise done at the office.

Eight Best Practices for Avoiding Data Breaches [Cyber Law Monitor Blog]

March 06, 2020

As data breaches are on the rise, the old adage rings true: it's not a question of if, but when. More companies are experiencing crippling breaches and the statistics are alarming:  According to IBM Security’s Cost of a Data Breach Report 2019, the average cost of a data breach is $3.9 million and...

Events & Seminars

Past Events

Insurance and Reinsurance Symposium

March 12, 2020 - Philadelphia, PA

NetDiligence Cyber Claims Study

November 06, 2019 - Webinar

Smart Talk: Cyber Security

September 17, 2019 - Philadelphia, PA

Emerging Legal Issues in Health and Pharmaceutical Law

October 10, 2017 - Indianapolis, IN

Ethical Use of Technology

July 21, 2017 - Webinar

Industry Sectors


  • Temple University School of Law, J.D., cum laude, 1998
  • Colgate University, B.A., 1995

Awards & Honors

Super Lawyers "Rising Stars" - 2008, 2011, 2013. This award is conferred by Super Lawyers. A description of the selection methodology can be found here. No aspect of this advertisement has been approved by the Supreme Court of New Jersey.

First Judicial District Pro Bono Honor Roll - 2007-2019

Good Shepherd Mediation Program "Most Valuable Peacemaker" for Pro Bono work - 2006

Recipient of Distinguished Advocate Award by Philadelphia Support Center for Child Advocates

  • New Jersey
  • Pennsylvania
  • Pennsylvania Supreme Court
  • Superior Court of New Jersey
  • Supreme Court of New Jersey
  • U.S. District Court -- Eastern District of Pennsylvania
  • U.S. District Court -- New Jersey
  • U.S. Court of Appeals for the Third Circuit
  • American Bar Association
  • Defense Research Institute
  • Pennsylvania Bar Association
  • Philadelphia Bar Association
  • Philadelphia Support Center for Child Advocates
  • International Association of Privacy Professionals