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Management Biographies

Mark Greisiger

Mark Greisiger
President, NetDiligence®

Corporate Headquarters
Philadelphia, PA

Mark Greisiger has led NetDiligence®, a Cyber Risk Assessment and Data Breach Services company, since its inception in 2001. During that time, Mark has been responsible for the creation of highly-focused services that enable NetDiligence to support the loss control needs of US and UK insurers that offer cyber liability coverage (aka 'privacy insurance'). Many of these insurers rely on NetDiligence assessments to verify that applicants have appropriate levels of network security safeguards, privacy practices and client vigilance to qualify for cyber liability coverage.

Prior to joining NetDiligence, Mark spent 12 years in the insurance industry, primarily with CIGNA P&C, where he created the first generation of ‘cyber risk insurance’.

Mark is also a frequently published contributor to various insurance & risk management publications and a sought-after speaker on the topic of cyber risk and liability.

MS Information Systems, Drexel University
MS Villanova University
BS Pennsylvania State University

David J. Chatfield (Dave)

David J. Chatfield (Dave)
VP Cybersecurity Services, NetDiligence®

Coral Springs, Florida

Dave Chatfield is responsible for managing and conducting assessments of applicant IT environments in an effort to confer strategic loss-avoidance advantages to client underwriters participating in the cyber liability insurance industry. He is also responsible for managing NetDiligence’s QuietAudit® system, a cost-efficient, applicant screening mechanism used to supplement remote and on-site assessment tasks.

Prior to joining NetDiligence in 2001, Dave served as Manager of Insurance Risk Mitigation Services and Senior Security Consultant at Fiderus/EDS. Prior to that, Dave served as a Senior Consultant with IBM's Global Security and Privacy Services Practice, and was responsible for engagement management and performing tasks related to British Standard 7799 (BS7799) Information Security Assessments, Internet-based penetration testing, and firewall policy analysis. He also participated in the early methodology development and initial perform engagements relating to IBM's Privacy Services consulting solutions.

Earlier in his career, Dave provided Internet-focused technical networking services while employed in the Corporate IT Department at Intel Corporation in Santa Clara, CA, IBM's OS/2 Development Facility in Boca Raton, FL, and his alma mater, Cleveland State University in Cleveland, OH.

J.D., Cleveland-Marshall College of Law, Cleveland, OH (1991)
B.S. Computer and Information Science, Cleveland State University (1985)

Heather Osborne

Heather Osborne
Event Management & Client Services, NetDiligence®

Corporate Headquarters
Philadelpha, PA

Heather Osborne serves as event manager for NetDiligence’s twice-yearly signature conference, the NetDiligence® Cyber Risk & Privacy Liability Forum. In this role, Heather is directly involved in the development of program content, the selection of speakers and sponsors, and the marketing of these events.

In addition to her event responsibilities, Heather also serves in various capacities to support NetDiligence strategic alliances and clients. She is a key contributor to NetDiligence’s industry-leading cyber risk management web portal, eRisk Hub®. Among other duties, Heather works with eRisk Hub-listed vendors to develop timely and topical content for the portal. She also provides direct client support to eRisk Hub licensors.

Heather’s leadership, management and fundraising skills are based on legal and business experience in the public sector, arts administration and non-profit fields. Prior to joining NetDiligence in 2011, Heather held executive positions at arts and social services organizations, as well as serving as an Assistant Public Defender for the State of Maryland.

JD University of Maryland Francis King Carey School of Law
MALA St. John’s College, Annapolis, MD
BA University of North Carolina at Chapel Hill

Jamie Sheller

Jamie L. Sheller Esq.
Sales/ Marketing for Law Firm Breach Coach® Portal & Privacy Ethics Consultant

Corporate Headquarters
Philadelpha, PA

Jamie is a key contributor to NetDiligence’s industry-leading cyber risk management web portal, eRisk Hub. She works with legal partners to develop cutting edge content and resources to build their Cyber Security services, marketing and client base, and is a contributor to the Junta blog and to the program planning for all Netdiligence educational programing..

In her 25 year legal career she has handled medical device and drug product liability, complex product liability, multi-district, class action litigation as well as general personal injury cases through trial and appeal and has built a national reputation for her dedication to clients and pursuit of justice. Ms. Sheller has extensive experience in organizing mass tort document production and use of databases. She is fully familiar with state-of-the-art computer technology and how to effectively use it for litigation. She has participated in national discovery efforts as well as serving on committees for drafting discovery and pleadings for both class action and multi-district litigation. She has been actively involved in interfacing with attorneys from all parts of the country on various steering committees, as well as the coordinating courts in order to organize and make decisions relating to complex litigation.

Ms. Sheller comments frequently in the media. She appears regularly on The American Law Journal television program and has appeared on NBC Phildelphia's "Hotline" program live as a political commentator throughout a recent election season. She was interviewed following her recent success in the Paxil birth defect case by network television, public broadcasting, and print media around the United States. She was also featured in discussion about the case on blogs and websites, including those of other attorneys who followed the case.

Ms. Sheller has been recognized as a Pennsylvania SuperLawyer since 2005 and in 2010, 2011, 2012 and 2013 a Top 50 Women Pennsylvania SuperLawyer.

A speaker at numerous conferences for the American and Pennsylvania Trial Lawyers Association, American Bar Association, and American Association for Justice, Ms. Sheller has also a featured speaker for numerous conferences and symposia, on topics ranging from pharmaceutical and medical device liability (including defective hip implants and antidepressant birth defects litigation), mass torts, cyber security and privacy breach, professional development and more.

Ms.Sheller has been appointed by Pennsylvania mayors and former Governor Rendell to governmental boards and development authorities.

BA NYU 1986
JD Villanova University 1989

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