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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.
Product Manager for the Breach Coach® Cyber Portal and Privacy Ethics Consultant

Corporate Headquarters
Philadelpha, PA

Jamie is the Principal for the NetDiligence Breach Coach® Cyber Portal for law firms. She also works closely with NetDiligence’s law firm clients to develop cutting-edge resources for their client-facing cybersecurity and data breach response practices.

Jamie is also actively involved in assisting clients with Privacy Ethics and in educating corporate Boards of Directors about their emerging data security responsibilities.

Prior to NetDiligence, in her 25-year legal career Jamie handled complex product liability, multi-district, class action litigation as well as general personal injury cases through trial and appeal. She has built a national reputation for her dedication to clients and the pursuit of justice. 

Jamie comments frequently in the media and appears regularly on The American Law Journal television program. She has been recognized as a Pennsylvania SuperLawyer since 2005 and a Top 50 Women Pennsylvania SuperLawyer in 2013.

BA NYU 1986
JD Villanova University 1989

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