AssureSign’s leadership team is comprised of the most seasoned executives in the electronic signature software industry. With over 40 years of combined experience, AssureSign leaders take great pride in consistently providing customers and partners with the tools and resources necessary to promote the ultimate electronic signature experience.


David W. Brinkman

President & Chief Executive Officer

David W. Brinkman has been an entrepreneur in technology since 1985, having served as a computer programmer for Health Technologies and a project manager at Virtual Technologies Inc. before co-founding AssureSign LLC’s two sister companies, Marketing Systems Group, Inc. and Third Party Verification, Inc. (3PV). Under his leadership as Chief Executive Officer of each company, both have grown exponentially since their inception. Building on the highly successful track record of these two companies, David co-founded AssureSign LLC in January 2008. To launch this latest corporate venture, he has been involved in the development of some of the most innovate applications available in the electronic signature software industry.

David is an active board member of the Electronic Signature and Records Association (ESRA).  ESRA provides a vendor- and technology-neutral forum that advocates public policy and promotes the inherent compliance, efficiency and transparency benefits of electronic processes to the public, businesses and government alike. David has served as the Association’s Chairman in 2013, Vice-Chairman in 2012 and currently holds the position of Treasurer.


Donald Kratt

Chief Technology Officer

Donald was brought in to AssureSign’s sister company, 3PV, in 2003, and oversees the Software Engineering operations of both companies. He helped architect the AssureSign platform and constructed the engineering team, and he continues to oversee the telephony and software applications of the 3PV company. Previously, Donald has worked with other software companies, including the development of legal industry software applications at Equitrac and insurance automation products at Applied Systems. Originally from Dearborn, Michigan, Donald graduated in 1989 with a bachelors degree in finance from Wayne State University in Detroit, Michigan.


David Madison

Director of Operations

Dave started with AssureSign in 2007 managing the Software Quality Assurance group for both AssureSign and her sister company, 3PV. He has grown within the company to also manage Client Services, Project Management, Audit and Call Center Operations. Dave has worked in both hardware and software markets ranging from the US Air Force, the entertainment industry at Sea World of Florida, the telecommunications industry at Geotek Communications, business and legal software at Equitrac and enterprise software development at Veritas and Symantec. Dave grew up in Virginia, settling in Florida as an adult. Dave is a Certified Christian Counselor and serves as the Youth Minister at his local church.


Dianna George

General Manager of Global Insurance Solutions

A veteran insurance technologist, Dianna George is responsible for directing operations and supporting AssureSign’s insurance industry customers, as well as leading new business efforts in insurance. Prior to her role with AssureSign, George served as IT site manager and operations advisor for more than 15 years with leading insurance brokerage firm HUB International. George is also a prominent member of the Applied Client Network, the world’s largest group of educators and advocates for users of Applied Systems Software. With more than a decade of service to the organization, Dianna George has served as the president of the Ontario chapter of Applied Client Network for four terms, while also performing as a lead member of the Canadian industry solutions committee for three terms. Dianna holds a degree in information services from Fanshawe College in Ontario.