.

David J. Shannon

Chair, Privacy and Data Security

Chair, Intellectual Property, Technology and Media Litigation

Portrait of David J. Shannon

David chairs both the Privacy and Data Security Practice Group and the Intellectual Property, Technology and Media Litigation Practice Group. He concentrates a substantial portion of his practice on privacy law, data breaches, intellectual property, copyright and trademark infringement, as well as trade secret, trade dress technology 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 is a national and international featured speaker at privacy and data security conferences and seminars. His presentations focus on legal issues and emerging trends in the insurance industry with an emphasis on all areas of privacy, data breach and data security.

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 25 years, he has tried a number of bench trials, jury trials, and arbitrations.

    • Widener University Delaware Law School (J.D., 1994)
    • Denison University (B.A., 1990)
    • New Jersey, 1994
    • Pennsylvania, 1994
    • U.S. Court of Appeals 3rd Circuit, 1998
    • U.S. District Court Eastern District of Pennsylvania, 1998
    • U.S. District Court District of New Jersey, 2000
    • U.S. District Court Middle District of Pennsylvania, 2006
    • Legal 500 Philadelphia Legal Elite, Intellectual Property (2025-2026)
    • Pennsylvania Super Lawyers (2005, 2026)
    • Pennsylvania Bar Association, IP Law Section, Past Chair
    • Philadelphia Bar Association
    • Professional Liability Underwriting Society
    • PLUS Podcast: Managing Cybersecurity Threats in 2025Episode 2, Beyond the Breach: Remediation vs. Forensic Investigation, December 2025
    • PLUS Podcast: Managing Cybersecurity Threats in 2025Episode 1, "Ransomware, Business Email Compromise, AI and The Increasing Sophistication of Cyber Threat Actors," July 2025
    • PLUS Podcast: Managing Cybersecurity Threats in 2024, Episode 3, Restoration After The Data Breach, December 2024
    • PLUS Podcast, Managing Cybersecurity Threats in 2024, Episode 2: SEC Amendment's Impact on Compliance and Reporting, July 2024
    • PLUS Podcast: Managing Cybersecurity Threats in 2024, Episode 1:The Persisting Threat of Ransomware, February 27, 2024 
    • PLUS Podcast: Managing Cybersecurity Threats in 2023. Episode 2: The Current State of Ransomware Attacks in 2023. April 2023
    • Critical Infrastructure – A Global View on Cyber Risk and Systemic Threats, ILG 360º London Annual Conference 2023, March 15, 2023
    • PLUS Podcast: Managing Cyber Security Threats in 2023. Episode 1: Cryptojacking - New Risks For Carriers and Their Insureds. March 2023
    • Business Email Compromise & Wire Transfer Fraud - Evolving Trends and Cyber Crime, Marshall Dennehey Client Webinar, Presented to Multiple Clients, 2022
    • Ransomware Attacks: An Ongoing Global Threat, Marshall Dennehey Client Presentation, Presented to Multiple Clients, 2022
    • Ransomware Attacks: An Ongoing Global Threat, ILG Virtual Conference, March 31, 2022
    • Cybersecurity: Crucial for a Law Firm’s Survival, Moderator, Philadelphia Association of Defense Counsel, November 16, 2021
    • Civil Litigation Updates in COVID-19 Litigation – Where Do We Stand One Year Later? Marshall Dennehey Webinar, May, 2021
    • Ransomware Attacks: An Ongoing Global Threat, ILG Virtual Conference, March 25, 2021
    • Cyber Security & Construction, National Association of Women in Construction, November 2020
    • Speaking Up on Silent Cyber, A.M. Best Webinar Panelist, May 2020 
    • Emerging Global Cyber Ransom Threats Require A Strategic Response From The C-Suite, A.M. Best Insurance Law Podcast, July 2018
    • Cyber Claims: What to Do?, National Conference of Insurance Guaranty Funds, November 2017 
    • Data Breaches Come in All Sizes, Beacon Technologies, April 26, 2017 
    • Cyber: Global Perspectives, Insurance Law Global, International Insurance Defence Network Conference, March 2017 
    • Cyber Security for the C Suite, panelist, SIM, February 7, 2017
    • Ethical and Statutory Concerns for Law Firms,  webinar panelist, Bloomberg & CNA Insurance, November 2, 2016
    • Cybersecurity for the C Suite, panelist, Tatum, October 26, 2016
    • Cybersecurity: Emerging Trends and the Current Regulatory Environment for Independent Financial Advisors and Independent Financial Services Firm, Financial Services Institute (FSI) webinar, September 22, 2016
    • The Changing Landscape of Cyber Liability Litigation, ACI’s 13th Advanced Forum on Cyber & Data Risk Insurance, July 29, 2016
    • Attorney Client Privilege Issues Arising out of Data Breaches, Breach Responses, and Subsequent Third Party Litigation, ACI Data Breach & Privacy Litigation and Enforcement Conference, March 18, 2016
    • Developments and Emerging Trends in the Legal and Insurance Areas of Cybersecurity, Travelers Insurance, February 2016
    • 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
    • Cyber Liability Exposures, Every Business Has Them, Panelist, PLUS Mid-Atlantic Chapter Seminar, May 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
    • Prevailed on a Motion to Dismiss in a data breach class action in the Eastern District of Pennsylvania. Sixteen named plaintiffs brought claims alleging that a hacker had accessed the personal information of over 1,000,000 individuals nationwide. We defended the debt collection company whose computer servers were compromised. Plaintiffs asserted broad and novel legal theories, including negligent failure to protect data, breach of implied contract, invasion of privacy, negligence per se, and violations of various state consumer protection laws. We successfully contested these claims, resulting in the dismissal of eight plaintiffs for lack of standing and 15 of the 17 asserted causes of action being dismissed.
    • Successfully represented and assisted a large commercial payment card processing company in a data breach notice that affected over 2 million customers.
    • 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.
    • Obtained 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 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 defended international chemical company in temporary and permanent injunction hearings regarding stolen trade secrets and hiring of former plant manager. 
    • Longenecker-Wells v. Benecard Services, No. 15-3538, 2016 U.S. App. LEXIS 15696 (3d Cir. Aug, 25, 2016).
    • Gianacopoulos v. Glen Oak Country Club, 2007 U.S. Dist. LEXIS 7710 (M.D. Pa. 2007)
    • Luszczynski v. Bradley, 729 A.2d 83 (Superior 1999)

Thought Leadership

Legal Updates for Privacy and Data Security

Identity Theft Resource Center Report Reveals Rising Data Breaches Despite Drop in Mega Breaches

February 19, 2026

The Identity Theft Resource Center (ITRC), a well-known, non-profit identity theft and fraud prevention organization, recently released its 2025 annual data breach report with significant findings for the data breach field. The ITRC tracked 3,322 data breaches in 2025 – an increase of more than 5% compared to 2024. The numbers set a new record for U.S. data breaches tracked by the ITRC over the past 20 years. These numbers also show a 79% jump in data breaches over the last five years.  Just as importantly, the number of victim notices that were sent out decreased. In 2024, the ITRC found that over 1.3 million notices had been sent out, while in 2025 less than 300,000 notices were distributed. The ITRC noted that the significant decrease in victim notices was likely due to the lack of “mega-breaches” in 2025 compared to 2024.  The ITRC also found that the financial services industry was the most breached industry in 2025 followed by health care, professional services, manufacturing, and education.  The ITRC’s president was quoted that they had found “more attacks that are more precise, more automated and more difficult to detect. Consumers can take all of the right steps, businesses can have the best cyber security and still fall victim to criminals.”   These findings are significant for the cyber security insurance field. While mega breaches may be decreasing, the overall number of breaches demonstrates that all businesses should be obtaining proper cyber security insurance, and insurance carriers should be aware that while less notices will go out, more claims will be made that can affect both underwriting and the claims procedures.  Legal Updates for Privacy & Data Security - February 19, 2026, has been prepared for our readers by Marshall Dennehey. It is solely intended to provide information on recent legal developments and is not intended to provide legal advice for a specific situation or to create an attorney-client relationship. We welcome the opportunity to provide such legal assistance as you require on this and other subjects. If you receive the alerts in error, please contact MeDeSatnick@MDWCG.com. ATTORNEY ADVERTISING pursuant to New York RPC 7.1. © 2026 Marshall Dennehey, P.C. All Rights Reserved.

Managing Cybersecurity Threats in 2025 - Episode 2 - Beyond the Breach: Remediation vs. Forensic Investigation

December 1, 2025

In this podcast, David J. Shannon discusses incident response, ransomware attacks and the timing of breach attempts.

Firm Highlights

Thought Leadership

What’s Hot in Workers’ Comp - News and Results*

RESULTS* Ben Durstein (Wilmington) obtained a favorable decision involving a claimant who fractured his patella in a work accident requiring two surgeries. The IAB rejected the claimant’s medical expert’s opinion that he sustained a 25% permanent impairment to the right lower extremity. Instead, the board accepted the opinion of the employer’s medical expert that the appropriate permanency was 13% utilizing the 6th Edition of the AMA Guides to the Evaluation of Permanent Impairment. Tony Natale III (King of Prussia) successfully had a claim petition alleging new injuries and periods of disability dismissed based on full recovery. The claimant was injured when his skid loader was struck by another loader in the process of baling hay. Original injuries were accepted and the claimant returned to work. Thereafter, the claimant abandoned work and filed a claim petition to assert new injuries and extended disability. Cross examination of the claimant’s medical expert stunningly revealed his failure to review claimant testimony, his lack of awareness of a social security disability decision detailing the existence of claimant’s alleged work-related conditions prior to the date of work injury, and his failure to understand that the claimant admitted to full recovery of injuries for which he was continuing to treat. Tony Natale III (King of Prussia) successfully obtained a defense verdict in a Medicare conditional payment lien third level appeal. The United States government alleged a Medicare conditional lien payment was due and owing in the upper six-figure range based on an auto accident and PIP policy for which the government conditionally became the primary carrier. The government argued that our client, the PIP carrier, was the primary payer and, under federal law, must reimburse the government for its conditional lien payment. At the third-level appeal hearing, the government’s position was refuted by the revelation that the date of injury tied to the medical bills associated with the lien was glaringly and chronologically prior to the insurer’s PIP policy date. The court held that based on this evidence and argument, the government could not meet its requirements to assert a lien against our client. A. Judd Woytek (King of Prussia) and John Abda (Scranton) successfully had a workers’ compensation claim petition granted for medical benefits only for a closed period with no wage loss awarded. The claimant alleged multiple injuries as the result of a very minor motor vehicle incident where a co-worker’s delivery van rolled down an incline of approximately six feet, and bumped into the rear of the claimant’s delivery van. He claimed he was thrown forward and suffered head and neck injuries, along with aggravating a pre-existing ankle injury. The claimant was also terminated following the accident for having a large hunting knife in his van, which was against the employer’s workplace violence policy. The judge granted the claim for a mild concussion and an ankle contusion, but terminated medical benefits as of the date of our IME’s. The judge found that no wage loss benefits were payable as the claimant was terminated for cause and work remained available to him. The judge found our medical experts to be more credible than the claimant’s, along with finding our four employer witnesses to all be credible. The trial team was assisted by paralegal Bonnie Zemek (King of Prussia). Eric Scott Thompson (Wilmington) was successful in a workers’ compensation matter in Delaware. On October 15, 2024, the claimant was injured while performing fire training in a multistory building when he tripped over a fire line, injuring his right knee. The claimant received regular and consistent treatment for the right knee through August 29, 2025, when he presented with left knee complaints for the first time. His treating orthopedist diagnosed a hamstring strain. The claimant was next seen October 15, 2025, with continued left knee complaints, and was referred to a total knee doctor within the practice. He was then diagnosed with a posterior root tear of the medial meniscus. Our expert testified that it was not plausible for a lateral hamstring strain to progress to a meniscal tear in two months. The claimant required a total knee replacement that was ultimately performed in February 2026. In the six months between the time of initial presentation with left knee complaints and the total knee replacement, conservative care consisted of a single injection. Our expert testified that posterior root media meniscal tears can respond to conservative care, and it was not known if it would with the claimant because it was not adequately explored. The Industrial Accident Board agreed with our expert and determined that the claimant failed to meet the burden of establishing more likely than not that the left knee complaints were caused by overloading/overuse as a result of the compensable injury to the right knee. They also agreed that the claimant was able to return to work in a sedentary capacity as opined by his physicians and our expert prior to the left total knee replacement and that there were employment opportunities available within his restrictions and capabilities as presented by the vocational expert. As a result, the claimant was no longer entitled to total disability benefits and will receive partial disability benefits for which he is limited to 300 weeks. Michele Punturi (Philadelphia) and Alana Staniszewski (Pittsburgh) had a termination petition granted in a Pennsylvania workers’ compensation case. The petition involved an echocardiography technologist with long-term employment at a local hospital who sustained a right shoulder injury resulting in surgery in January 2024. Following surgery, the claimant was diagnosed with a frozen shoulder and underwent additional surgery in June 2024, with a recommendation for a third surgery. The opinions of the defense medical expert, a Board-certified orthopedic surgeon, were found credible, persuasive, and competent based upon the extensive history he obtained from the claimant, analysis of the mechanism of injury, and review of records, along with comparison of MRIs from October 2023, February 11, 2024, and January 6, 2025, which failed to reveal any causal relationship other than a strain/sprain of the right shoulder. This evidence supported that the claimant had fully recovered, and was not in need of any ongoing medical treatment and/or restrictions. In particular, despite allegations of injuries beyond a sprain/strain, the defense medical expert identified that those allegations were not consistent with what was found at the time of surgery, and elements of the surgery were to treat a chronic and degenerative condition. Additionally there were no ongoing issues or problems with the subscapularis, which was intact, consistent with the follow-up MRI of February 11, 2024, and the claimant did not have evidence of a frozen shoulder. In fact, the MRIs and mechanism of injury, he opined, did not support any injury causing tendonitis or inflammatory conditions within the bicep tendon. Furthermore, multiple days of surveillance footage demonstrated the claimant’s normal use, with the ability to sweep and shovel snow, operate her vehicle, raise her arms above shoulder level, and use a broom – all without any observable difficulty, which challenged the claimant’s credibility of a disability and further established a lack of causation. As a result of this favorable decision, supersedeas fund reimbursement will be obtained for both wage loss and medical benefits through the supersedeas fund recovery process. *Prior Results Do Not Guarantee a Similar Outcome NEWS Heather Carbone (Jacksonville) was a panelist for a webinar hosted by The Workers’ Compensation Claims Professionals (WCCP) Association. As part of the “Meet the Experts” Series, the speakers addressed “Afterthoughts that Undermine a Successful Mediation,” highlighting the pitfalls and challenges of underprepared or unprepared mediation participants. The discussion included appropriate pre-mediation communications, setting of expectations, management of expectations, and working through the unexpected or unprepared. Attendees gained ideas about how and when to prepare, best practices, and the potential for non-parties (spouse, significant other, risk owners-insurers) to have differing perspectives or concerns than the actual employee and employer. On May 21-22, 2026, A. Judd Woytek, (King of Prussia) joined a panel at the CLM Alliance (Claims and Litigation Management Alliance) Work Comp Conference in Nashville to present "We See You: How Employee Engagement Enhances Work Comp Outcomes." Judd and his fellow panelists discussed the positive impact of employee engagement on claim outcomes, return-to-work timelines, and overall claim costs.

Result

No-Cause Jury Verdict Secured in Wrongful Death Trial

We successfully obtained a no-cause jury verdict in a 13-day wrongful death trial. The decedent, a 59-year-old man, was admitted to the emergency room on February 15, 2019, with complaints of abdominal pain, decreased appetite, and constipation, despite the use of laxatives. The patient did not complain of any nausea, vomiting, or diarrhea. He had a significant medical history including diabetes, hypertension, prior coronary artery stenting, morbid obesity (with past gastric bypass surgery), longstanding ventral hernia, and back pain. A CT scan revealed multiple hernias and a potential closed-loop bowel obstruction, leading to a surgery consultation. Our client, an emergency general surgeon, interpreted that the patient did not have a closed loop or any significant obstruction and recommended non-surgical management. The patient was approved to have clear liquids, and had a vomiting incident shortly after, but our client was not notified. The patient was returned to NPO status, and after improving overnight, he was returned to “clears” and additional medical and renal consults were ordered. Our client did not receive any communications from the residents/nurses of any changes in the patient’s condition. On February 18, 2019, two rapid responses were called due to increased heart rate and vomiting. It is believed that the vomiting resulted in aspiration, causing sepsis, ultimately leading to the patient’s death. During the trial, the plaintiff’s sole medical expert highlighted imaging on the wrong hernia, which called into question all of his opinions in the case. We made key objections related to the expert testimony, limiting what the allegations were, and preventing new allegations from being made. After approximately two and a half hours of deliberating, the jury returned a no-cause verdict. 

Thought Leadership

NJ Workers' Compensation Legislation Update

A couple more bills were introduced for the 2026-27 session. Any updates since February have been highlighted in bold. A1023 | S3984 Medical use of cannabis under certain circumstances This requires workers’ compensation, PIP, and health insurance coverage for the medical use of cannabis under certain circumstances. It was introduced on January 13, 2026 and referred to the Assembly Financial Institutions and Insurance Committee. It was also introduced on March 19, 2026 and referred to the Senate Commerce Committee. A1045 Certain injuries to volunteer and professional public safety and law enforcement personnel This revises workers’ compensation coverage for certain injuries to volunteer and professional public safety and law enforcement personnel. It was introduced on January 13, 2026 and referred to the Assembly Labor Committee. A3724 Personal liability to employer officers for failure to pay for coverage This provides personal liability for owner, executive officer, or executive director of employer for failure to pay for workers' compensation coverage. It was introduced on January 13, 2026 and referred to the Assembly Labor Committee. On May 7, 2026, it was reported and referred to Assembly Judiciary Committee. A4617 Certain workers' compensation supplemental benefits and funding method This concerns certain workers' compensation supplemental benefits and funding method. For a permanently and totally disabled worker or surviving dependents after December 31, 1979, with some exceptions, this bill provides for an annual cost of living adjustment in the weekly workers’ compensation benefit rate. It was introduced on March 10, 2026, and referred to the Assembly Labor Committee. S241 Inclusion in database of appointed officials This requires that workers’ compensation judges and administrative law judges be included in database of appointed officials. It was introduced on January 13, 2026 to the Senate, Referred to Senate State Government, Wagering, Tourism & Historic Preservation Committee. A1870 | S1379 Workers' compensation benefits for certain workers due to September 11, 2001, terrorist attacks This provides workers’ compensation benefits for certain public safety workers who developed illness or injury as result of responding to September 11, 2001 terrorist attacks. It was introduced on January 13, 2026 and referred to the Assembly Labor Committee. It was also introduced on the same day and referred to the Senate Labor Committee. On February 5, 2026, it was reported from the Senate Committee, 2nd Reading, and referred to the Senate Budget and Appropriations Committee. A2779 | S1521 Excludes Certain Illegal Aliens This excludes certain illegal aliens from workers’ compensation and temporary disability benefits. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. A2792 | S1555 Prevent Intoxicated Employees from Workers’ Compensation This prevents intoxicated employees from receiving workers’ compensation. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. S2290 Increase Mandatory Retirement Age This increases statutory mandatory retirement age for Supreme Court Justices, Superior Court Judges, Tax Court Judges, Administrative Law Judges, and Workers’ Compensation Judges from 70 to 72. It was introduced on January 13, 2026, and referred to the Senate Judiciary Committee. A3167 | S2372 Workers’ compensation insurance requirements for certain corporations and partnerships. This concerns workers’ compensation insurance requirements for certain corporations and partnerships. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. A1384 | S2757 Reduce Statute of Limitations in Medical Fee Disputes This reduces statute of limitations from six years to two years in medical fee disputes in workers’ compensation matters. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. S3144 Testimony in Workers’ Compensation This concerns submission of testimony in workers’ compensation claims. It was introduced on January 13, 2026, and referred to the Senate Labor Committee. S3342 Increase Mandatory Retirement Age This increases statutory mandatory retirement age for Supreme Court Justices, Superior Court Judges, Tax Court Judges, Administrative Law Judges, and Workers’ Compensation Judges from 70 to 75. It was introduced on February 5, 2026, and referred to the Senate Judiciary Committee. A3548 | S3571 Maximum benefits for certain volunteers This provides certain volunteer and other workers with maximum compensation benefit for workers' compensation claim regardless of outside employment.. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. On March 2, 2026, it was reported from the Senate Committee, 2nd Reading, and referred to the Senate Budget and Appropriations Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. On May 7, 2026, it was reported and referred to Assembly State and Local Government Committee.