Andrea E. Hammel


Andrea E. Hammel is an experienced investigator and trial attorney who represents corporate clients in complex commercial and general litigation matters. Andrea routinely handles a wide array of catastrophic injury cases from inception through trial, primarily in the areas of construction, premises liability, transportation and product liability. Andrea is familiar with a broad range of companies of different sizes and specialties and has extensive experience representing multinational companies in the hospitality, construction, gaming and energy industries. She represents oil and gas companies in litigation involving lease disputes and contract issues and counsels energy clients on permit disputes and land transactions. She also assists large hoteliers and travel management companies, among others, with premises liability matters, contract issues, and non-disclosure disputes. Andrea concentrates her practice on matters that entail extensive discovery, in-the-field fact-finding, and detailed contractual analysis. She is experienced in quickly identifying the pivotal components of a case and relentless in her pursuit of critical evidence.

Beyond pure litigation, Andrea works closely with her clients to understand the full scope and nature of their businesses and limit their exposure to potential claims and litigation. She conducts assessments of internal practices and procedures, develops risk-management protocols, provides employee training, and offers counseling on overall litigation strategy. 

Prior to attending law school, Andrea worked in the special investigations unit of an insurance company for 10 years. She not only gained invaluable field experience, she also received training in modern investigative protocol from federal law enforcement agencies, both of which benefit her legal practice.

Andrea is a member of the American Bar Association, Montgomery Bar Association, and Pennsylvania Bar Association.

She earned her Bachelor of Arts from Washington State University and her law degree from the Widener University School of Law.



Cozen O’Connor Team Work to Preserve Lower Court Finding for Anadarko in Law360

October 07, 2015

Stephen Cozen, Andrea Hammel, and Jared Bayer are pushing the Pennsylvania Supreme Court, on behalf of their client Anadarko E&P Co., to preserve a lower court finding that gas lease agreements remain valid in their original form even after the discovery of deed restrictions that must be resolved through legal action.

Andrea Hammel and Jared Bayer Achieve Favorable Ruling for Anadarko Petroleum Corp.

July 07, 2014

Andrea Hammel and Jared Bayer, members of Cozen O’Connor’s Commercial Litigation Department, obtained another favorable ruling on behalf of Anadarko Petroleum Corp. On Monday, July 7, the Pennsylvania Superior Court backed a lower court ruling that nixed a drilling rights dispute involving Chesapeake Energy Corp. and Anadarko Petroleum Corp., rejecting a landowner’s argument that oil and gas leases were governed by the Keystone State’s landlord-tenant law.

Andrea Hammel and Jared Bayer Prevail on Behalf of Anadarko Petroleum Corp.

March 17, 2014

Andrea Hammel and Jared Bayer, members of Cozen O’Connor’s Commercial Litigation Department, recently obtained a favorable ruling on behalf of Anadarko Petroleum Corp. The Pennsylvania Superior Court handed a win to Anadarko on Friday, March 14, ruling that oil and gas lease agreements remain valid in their original form even after the discovery of deed restrictions that require legal action to resolve. In a precedential ruling, a three-judge panel ruled that a 2006 agreement giving Anadarko E&P Co. LP access to oil and gas under a 62-acre property owned by Leo and Sandra Shedden remained valid as drafted, despite subsequent quiet title proceedings to clear the Sheddens from a previously unknown deed reserving half of the land’s subsurface rights.

Cozen O’Connor Elects 20 Associates to Membership

March 27, 2013

Ian Blum, Alphonso Collins, Kathryn Crary, Lynnette Espy-Williams, Elizabeth Featherman, Matthew Glazer, Nelsy Gomez, Andrea Hammel, Keenya Harrold, Charles Jesuit, Jr., Lezlie Madden, Marilyn Neiman, Tracey Nguyen, Cartherine Rosato Reilly, Megan Scheib, Daniel Schuch, John Schwartz, Shari Shapiro, Marko Stamenkovic, and Norasha Williams have been elected to membership in the firm.

Cozen O’Connor Attorneys Named To 2008 Pro Bono Honor Roll By First Judicial District Of Pennsylvania

February 04, 2009

Twenty-one attorneys in Cozen O’Connor’s Philadelphia office have been named to the 2008 Pro Bono Roll of Honor of the First Judicial District (FJD) of Pennsylvania.


Tenth Circuit: Withdrawal of Settlement Approval in 15-Year-Old Case Is Not "Final Decision" [Class Action Defense Review Blog]

February 08, 2011

The Tenth Circuit recently held that an order withdrawing approval of a four-year-old class action settlement agreement did not qualify as a “final decision” subject to appeal under 28 U.S.C. § 1291. While a final judgment is the quintessential “final decision”...

Events & Seminars

Past Events

10th Law of Shale Plays Conference

September 04, 2019 - Pittsburgh, PA

Critical Issues in Litigation – 2016

November 03, 2016 - New York, NY

Industry Sectors


  • Widener University School of Law, J.D.
  • Washington State University, B.A.
  • New Jersey
  • Pennsylvania
  • Pennsylvania Supreme Court
  • Supreme Court of New Jersey
  • U.S. District Court -- Eastern District of Pennsylvania
  • U.S. District Court -- Middle District of Pennsylvania
  • Superior Court of Pennsylvania
  • U.S. District Court -- New Jersey
  • American Bar Association
  • Montgomery Bar Association
  • Pennsylvania Bar Association