David J. Shannon: Lawyer with Marshall Dennehey Warner Coleman & Goggin, P.C.

David J. Shannon

David J. Shannon is a shareholder with Marshall, Dennehey, Warner, Coleman & Goggin. His practice is devoted largely to the defense of design professionals in matters regarding intellectual property, technology litigation, copyright infringement, trademark, trade secret, and trade dress litigation.
Shareholder; Chair, Technology, Media & Intellectual Property; Co-Chair Privacy and Data Security
Philadelphia,  PA  U.S.A.
Phone(215) 575-2615

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Practice Areas

  • Technology, Media and Intellectual Property Litigation
  • Privacy and Data Security
  • Architect & Engineering
  • Construction Delay Damages Litigation
  • Professional Liability
  • Commercial Litigation
University Denison University, B.A., Political Science, 1990
Law SchoolWidener University School of Law, Wilmington, Delaware, J.D., 1994 Moot Court Honor Society, American Jurisprudence Award, Constitutional Law
Admitted1994, Pennsylvania; 1994, New Jersey; 1998, U.S. Court of Appeals 3rd Circuit; 1998, U.S District Court Eastern District of Pennsylvania; 2000, U.S District Court of New Jersey; 2006, U.S. District Court Middle District of Pennsylvania

Associations & Memberships

•DRI, Data Management & Security Committee
•Pennsylvania Bar Association, IP Law Section, Past Chair
•Philadelphia Bar Association


David chairs the Technology, Media and Intellectual Property Practice Group and the Privacy and Data Security Practice Group. He concentrates a substantial portion of his practice on privacy law, data breaches, intellectual property, copyright infringement, trademark, trade secret, technology litigation, trade dress and media related litigation. David is experienced defending privacy and intellectual property cases venued throughout the United States, and has been litigating cases in federal and state courts since 1994.

David additionally represents design professionals in a variety of construction industry related claims. He has extensive experience representing architects, engineers, surveyors, land developers, commercial property owners, general contractors, subcontractors and commercial landscapers. David has defended clients in cases that involved claims for design errors and omissions and other contractual and negligence claims. Over the past fifteen years, he has tried a number of bench trials, jury trials, and arbitrations.

In 1990 David received his B.A. in political science from Denison University. He then attended Widener University School of Law and received his J.D. in 1994. His legal experience includes working for a boutique civil litigation firm in the intellectual property and e-commerce group.

Honors & Awards

•Pennsylvania Super Lawyer Rising Star, 2005

Year Joined Organization


Classes/Seminars Taught

A Legislative Update From the Front Lines, DRI Data Breach and Privacy Law Conference, November 4, 2015

Litigation Roundup Including Recent Supreme Court Developments on Article III Standing, Injury, Damages (Spokeo v. Robins), Class Actions, and Data Breach Litigation, ACI's 17th Advanced Global Legal & Compliance Forum on Cyber Security & Data Privacy and Protection, October 5, 2015

Cyber Liability Insurance: New Risks & Emerging Trends, Insurance Brokers' Association of the State of New York (IBANY), September 16, 2015

Liability Concerns for Architects, Engineers and Construction Professionals: Pennsylvania Intellectual Property Overview, Marshall Dennehey Client Seminar, July 2015

Online Ethics: Blawgs, Directory Listings, Q & A Forums & Social Media Use and Confidentiality and Data Security, National Business Institute, April 2015

Cyber Hackers Are Everywhere! Are You Prepared? Philly I-Day, April 9, 2015

Current Trends in Data Breach First and Third-Party Claims and Litigation, American Conference Institute's Cyber & Data Risk Insurance conference, March 24, 2015

Hot Topics in Employment, Assurex Loss Control & Claims Conference, October 22, 2014

Cyber Technology, Data Breaches and Related E&O Trends, Claims and Coverage, moderator and speaker, 8th Annual ExecuSummit E&O Insurance Conference, June 2014

Hot Topics in Employment, Marshall Dennehey / AIG Seminar, Philadelphia, PA, October 10, 2013

Employment Liability in the Cyber Age, Marshall Dennehey / AIG Employment Seminar, Pittsburgh, PA, May 2, 2013

Cyber Liability Claims, Coverage Issues, panel speaker, 2nd Annual National Cyber Liabilities Insurance ExecuSummit, 2013

Data Privacy Risk: Red Flags in Higher Education, ASFAA Annual Conference, 2012

Construction Law Fundamentals, Managing Project Risk, Instructor, National Business Institute, 2008

Safeguarding Proprietary Information in Pennsylvania, Course Planner and Instructor, National Business Institute, 2005

Intellectual Property Law for the General Practitioner, Course Planner, Pennsylvania Bar Association Annual Meeting, 2004


•Phi Delta Theta

Media Commentary

•' The Cost of Cybersecurity: Risks and Responses on the Rise, The Legal Intelligencer, February 17, 2015


Employment Liability in the Cyber Age
Seminar • May 2, 2013

Join us for this unique presentation on cutting edge employment issues. The seminar will feature a mock trial Social Media on Trial - How Social Media Affects Employers and a panel discussion Cyber Data Breach - The Latest...

Cyber & Data Risk Insurance - Spring Conference
Conference • Mar 24, 2014

David J. Shannon, co-chair of Marshall Dennehey's Privacy & Data Security Practice Group, will be a featured speaker at the ACI's Cyber & Data Risk Spring Conference, held March 24 - 25 in Chicago. The forum will focus on the right...

8th Annual National E & O Insurance ExecuSummit
Conference • Jun 17, 2014

David Shannon will discuss E & O Cyber Liability at the 8th Annual E & O Insurance ExecuSummit, to be held June 17 - 18 in Uncasville, CT. Additionally, Jeffrey Chomko will participate on a panel discussing Insurance Agents & Brokers E...

Philly I-Day
Conference • Apr 9, 2015

David Shannon will be a featured speaker at Philly I-Day 2015, to be held April 9 at the Pennsylvania Convention Center. Mr. Shannon and a distinguished speaker panel will present, Cyber Hackers Are Everywhere - Are YOU Prepared? Philly...

Legal Ethics: Top Challenges
Seminar • Apr 27, 2015

Event Description:This course compiles the toughest current challenges attorneys face in protecting their professional reputations. Who Should Attend?This basic-to-intermediate level ethics...

IBANY Cyber Liability Seminar
Seminar • Sep 16, 2015

David Shannon will present at IBANY's Cyber Liability seminar on Wednesday, September 16.Presentation Highlights:As cyber insurance transitions from a discretionary to an essential coverage, underwriters are challenged with properly...

ACI 17th Advanced Global Legal and Compliance Forum on Cyber Security and Data Privacy & Protection
Conference • Oct 5, 2015

David Shannon will speak at the American Conference Institute's (ACI) 17th Advanced Global Legal and Compliance Forum on Cyber Security and Data Privacy & Protection in Houston on October 5, 2015. David and his fellow panelists will present...

ACIs Data Breach & Privacy Litigation & Enforcement Conference
Conference • Mar 17, 2016

David Shannon will be a featured speaker at the ACI's Data Breach & Privacy Litigation & Enforcement Conference, to take place March 17 - 18 at the Union League in Philadelphia.


The Impact of EU Rulings on the Cyber Landscape

Articles • October 13, 2015

Are Hackers Secretly Stealing Your Practice?

Articles • June 23, 2015

On The Pulse...Our Technology, Media & Intellectual Property Litigation Practice Group

Defense Digest Article • September 1, 2014

By David J. Shannon, Esq.*A luxury handbag retailer faces claims of trademark infringement; an internet computer sales company is confronted with copyright infringement claims; an international software company is accused of violating a compliance..., Defense Digest, Vol. 20, No. 3, September 2014Defense Digest is prepared by Marshall Dennehey Warner Coleman & Goggin to provide information on recent legal developments of interest to our readers. This publication is not intended to provide...

Financial Advisor Forecast: Stormy With Scattered Data Breaches

Articles • June 23, 2014

Feds Are Serious About Data Security

Law Alerts • April 17, 2014

In what could be a landmark ruling in the data breach legal field, a New Jersey district court recently ruled that the FTC's lawsuit against Wyndham Hotels for unfair and deceptive trade practices related to a major data breach could...

How to Minimize the Threat of the Dreaded Data Breach

Articles • December 2, 2013

Provision in indemnity agreement that covers losses due to indemnities' own negligence must be in clear and unequivocal language.

Law Alerts • October 18, 2013

The Court of Common Pleas in Philadelphia County reaffirmed that, if parties intend to include within the scope of their indemnity agreement a provision that covers losses due to the indemnities' own negligence, they must do so in clear and..., Case Law Alert, 4th Quarter 2013

Privacy & Data Security: Protecting Your Company from Cyber Attacks

Law Alerts • June 4, 2013

Eric A. Packel, attorney in Marshall Dennehey's Privacy & Data Security, and Technology, Media & Intellectual Property practice groups and contributor to the group's blog, Data Breach Legal Watch, was recently featured on LXBN-TV,...

How to Avoid Liability For Comments Posted to Your Companys Website

Case Study • December 1, 2012

An Interactive Company Website Does Not Necessarily Mean Liability

Case Study • November 6, 2012

Reported CasesSignificant Representative Matters: Successfully represented and assisted a large commercial payment card processing company in a data breach notice that affected over 2 million customers.; Successfully provided cyber and data breach risk management counsel to companies in the retail, education, medical, municipal and professional services industries.; Successfully defended and resolved a multimillion dollar trademark and dilution lawsuit in the 9th Circuit that included obtaining dismissal of the dilution claim.; Obtained complete denial of a temporary and permanent injunction motion after a weeklong injunction hearing in a trademark dispute over a well known East Coast antique show brand.; Successfully resolved several copyright infringement claims by an international music recording association against various entertainment venues in the Northeast United States.; Obtained a complete dismissal of all claims against a website developer on the first day of trial in a matter where plaintiff alleged significant lost profits after a new customer ordering platform was installed for plaintiff's website.; Successfully resolved a significant copyright infringement claim by the heirs of a famous European author against a United States Theater where plaintiff attempted to enjoin national theater production and claim past and future profits.; Defeated vicarious liability claims for trademark infringement by luxury handbag manufacturer against the owner of a large retail shopping center. All claims were dismissed after a summary judgment motion was filed.; Obtained voluntary dismissal of trade secret and theft of confidential information matter where the initial demand was over $300, 000 by demonstrating that no trade secrets existed in the plaintiff's manufacturing process.; Successfully obtained summary judgment in an architectural copyright infringement action by demonstrating that client did not infringe on the plaintiff's drawings for a country club.; Successfully obtained a voluntary dismissal of a claim for engineering professional negligence after filing summary judgment motion that demonstrated plaintiff's claims in an artificial turf project had no merit.; Represented international software companies in numerous copyright and trademark infringement actions that have generated more than $3 million in settlement.; Successfully defended international chemical company in temporary and permanent injunction hearings regarding stolen trade secrets and hiring of former plant manager.; Representative Cases: Luszczynski v. Bradley, 729 A.2d 83 (Superior 1999); Gianacopoulos v. Glen Oak Country Club, 2007 U.S. Dist. LEXIS 7710 (M.D. Pa. 2007); Published Works: Weightmans LLP & Insurance Day Cyber Risk Survey Report, remarks on page 12. November 2015; The Impact of EU Rulings on the Cyber Landscape, Global Reinsurance, October 14, 2015; Are Hackers Secretly Stealing Your Practice? The Legal Intelligencer, Cybersecurity Supplement (page 8), June 23, 2015; New Year's Resolutions? For Financial Firms and Advisors, Cybersecurity Should Top the List, Aon Advisor Solutions newsletter, Winter 2015; Financial Advisor Forecast: Stormy, With Scattered Data Breaches, Financial Advisor, June 23, 2014; How to Minimize the Threat of the Dreaded Data Breach, Catalyst, Winter 2013/2014, publication of the Pennsylvania Chamber of Business and Industry; How to Avoid Liability for Comments Posted on Your Company's Website, Mondaq.com, 2012 and AgentsofAmerica.com, 2012; In A Copyright Infringement Action, a Secondarily Liable Defendant Is Only Responsible For One Statutory Damage Award, Pennsylvania Bar Association Intellectual Property Newsletter, 2011; Starbucks v. Charbucks: Substantial Similarity Is Not Required To Prove Dilution By Blurring, Intellectual Property Law Newsletter, Pennsylvania Bar Association, Summer, 2010; Splenda Not 'Equal' To Real Sugar In Lanham Act False Advertising Suit, Co-Author, New Jersey Law Journal, 2008; 2004, Comic Book Characters 'Spawn' Important Copyright Decisions, Pennsylvania Bar Association Intellectual Property Law Newsletter, 2004; Defense to the Inevitable Disclosure Doctrine, the Legal Intelligencer, 2004; Streaming Video 'Trailers' on the Internet Violate Motion Picture Copyright, Co-Author, Pennsylvania Bar Association IP Law Newsletter, 2004

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Office Information

David J. Shannon

2000 Market Street, Suite 2300
PhiladelphiaPA 19103


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