Our Leadership

In 2017 TMG will celebrate it's 30th Anniversary. Our thanks to our current and former staff & client-partners!

Gregg H. Talley, FASAE, CAE | President and CEO

Gregg H. Talley, FASAE, CAE, President & CEO, has a broad range of experience from several perspectives and over 30 years within the Association/Event Management Industry. Prior to founding TALLEY MANAGEMENT GROUP, INC. (TMG), Gregg worked with a destination marketing organization and for a hotel development company.   In 1987 he founded TALLEY MANAGEMENT GROUP, INC. with his partner and father Robert K. Talley.


With a degree from Georgetown University’s School of Foreign Service in international relations, Gregg has utilized those skills to plan national and international events and manage national and international organizations and boards in an array of industries including healthcare, education, technology and finance. Gregg gained his Certified Association Executive (CAE) designation in 1999 and his Fellow of the American Society for Association Executives (FASAE) designation in 2008.


Gregg’s experience in association management provides a 360-degree view of the stakeholders and pressures facing organizations when planning major international events. He also understands board perspectives on site selection, finance and local partnerships and support.


Gregg has personally managed literally hundreds of events globally for associations, societies, corporations and religious organizations including one of the largest convention events in North America, the 50,000+ attendee International Convention of Alcoholics Anonymous for over thirty years. TMG also managed the World Meeting of Families as part of the Papal Visit to Philadelphia in 2015. In addition, Gregg consults with nations and local destinations on developing business events strategies and destination management organizations.


A recognized professional in the field, Gregg consults, speaks and writes regularly on issues within association management, event management and business event strategy for organizations and destinations. Gregg was past National Chair of the Professional Convention Management Association (PCMA) and its Education Foundation. He currently sits on the International Section Council of the American Society of Association Executives (ASAE) and is a Board Member for the Meetings Management Sector at the International Congress and Convention Association (ICCA).

Mary Ruth Talley | TMG Corporate Treasurer

Mary Ruth graduated from the University of Pennsylvania. She is a former Commissioner of the Delaware River Port Authority, appointed by Governor Kean, and spent extensive time traveling the world promoting trade into our local ports. She bring years of experience as a volunteer in community organizations including the Seamen’s Church Institute as a Board Member and Chair. A few years after TMG became established, Mary Ruth decided to join the family business full time as Treasurer and joined the senior management team. Her leadership has helped steer TMG to success.

Charles (Chuck) L. Sapp, CPA, CAE | Director of Association Management Services Division

Chuck brings a unique combination of experiences and skills to our association management team. For over 20 years, Chuck has worked with complex association management structures and related services. As a registered, certified public accountant he is well versed in the financial, tax and audit issues facing today’s not-for-profits. In addition, Chuck is also a Certified Association Executive and has specialization in operational and financial management and process improvement in all areas of operations of the not-for-profit entity. He also has extensive experience in governance development in times of change with multiple organizations, both domestic and international in focus. Applying these accomplishments to the needs of the individual member and association is evident at every level of his association management style.

Heather Seasholtz, CMP | Director of Meetings and Events Division

Since 2000, Heather has been in the meeting and event management industry on both the supplier partner and client sides of our industry. She has planned meetings in healthcare, scientific, corporate and not for profit environments. She is a Certified Meeting Professional.
Heather began her career with ARAMARK in foodservice through institutional dining and catering and quickly discovered meeting planning. Her meeting planning experience includes corporate meetings and events for a large international publishing company and an industrial/construction buying group. Additionally, Heather has significant experience planning and executing healthcare meetings including product launches, advisory boards, sales training, investigator meetings, and many educational programs consisting of CME and other accreditations. Most recently, Heather worked for the American Association for Cancer Research (AACR) where she managed the logistics of the 18,000+ attendee Annual Meeting, as well as planned or assisted with the 25-30 other AACR yearly meetings.
Heather is a member of the Professional Convention Management Association (PCMA) and is on the Emerging Leaders Committee with the local Greater Philadelphia Chapter. She sits on the Board of the Penn State Hotel & Restaurant Society, which is an alumni group that supports the School of Hospitality at Penn State University. She also speaks to a class of Penn State students each semester about meeting planning and serves as a mentor to the students.

Diann Furfaro | Chief Financial Officer

Diann has dedicated her past 13 years of accounting experience to the service of not-for-profit organizations and the unique business challenges they face. Diann joined TMG in 2009, and has since developed an outstanding reputation for her expertise, which has consistently provided our clients with superior fiscal oversight and strategic guidance.
Prior to joining TMG, Diann was an auditor with a large international accounting firm. She later joined a spin-off of that firm as their accounting manager, providing outsourced accounting and consulting services to various organizations across several industries. Diann’s focus and ultimate specialty became managing the accounting operations of not-for-profit organizations.
Diann is a graduate of Rutgers University, where she graduated top of her class with a B.S. in Accounting. She is a member of the American Institute of Certified Public Accountants, American Society of Association Executives and the Pennsylvania Association of Non Profit Organizations.

Joseph Sapp, CAE | Director of Strategic Development

Joe is an experienced and proven Association Professional with a range of experience managing professional societies in the technology, construction and medical industries.
Joe currently serves as the Executive Director for several TMG association clients in addition to his role as the Associate Director of TMG’s Association Management Division.  Joe has a unique experience background to draw from through is work with both individual membership societies and credentialing organizations. In addition, Joe serves as TMG’s Emerging Technology Manager.  In that role he leads both clients and TMG in the evaluation and selection of various technologies to help advance their missions.
Joe is a Certified Association Executive and currently serves on the Mid-Atlantic Society of Association Executives Board of Directors and is a member of the American Society of Association Executives.  In 2013 he was selected to participate in ASAE’s NextGen Association Summit. In 2014 Joe was named to the Forty under 40 list by the Association Forum of Chicagoland.  In addition, Joe is an active blogger in the association community.  A former student-athlete at Northern Illinois University, Joe represents the NIU Wrestling Team on the NIU Varsity Club.