David Harrison     

Mariangela Humphreys

Ann-Marie White

Denise Gavilan

Strategic Partner

David Harrison, President



David Harrison is a seasoned public relations and marketing professional with more than 20 years' experience developing and executing integrated communications campaigns. 


He began his career in journalism, as a reporter for the Baltimore Business Journal and the American Banker. After creating and leading the professional association practice at a large regional public relations agency, David created Harrison Communications in 2007. 


Specializing in working with professional associations, commercial real estate firms and health care organizations, David has created numerous national and regional award-winning PR and branding campaigns.  David believes the critical element to any communications campaign is valuable content, and he helps clients uncover and deliver messages that desired audiences want to receive. 


David is a graduate of the University of Maryland, College Park with a degree in English Language and Literature/Liberal Arts in Business. 


Mariangela (Mia) Humphreys, Media Relations Director



Mia Humphreys  has been a public relations professional for more than 15 years, and her expertise is in media relations.  Mia has built and sustained relationships with television producers and print reporters thoughout the top 100 markets across the country. Her work has led to numerous national and regional television interviews for Harrison Communications clients. 


Mia has PR experience in a variety of industries including healthcare, retail, tourism, non-profit, associations and real estate.  Mia is a graduate of Villa Julie College, now Stevenson University in Maryland. 

Ann-Marie White, Account Executive

Ann-Marie White has more than 15 years of healthcare and non-profit communications experience. She has lead teams and overseen multi-million dollar budgets serving as a communications director for a variety of non-profits such as the American Heart Association and Heart Rhythm Society. From public health campaigns and cause marketing partnerships to clinical trial recruitment and running the press room for large medical meetings, Ann-Marie is dedicated to providing clients with superior results and excellent customer service.


Ann-Marie began her career at an international PR agency working on a number of prestigious healthcare and consumer accounts, including top 100 companies. She has a BA from Villanova University and received her Master’s degree in communications from the University of Georgia. 

Strategic Partner - Gavilan & Associates


Our strategic partner, Gavilan & Associates, provides marketing and advertising services for associations to assist in strategic planning; membership; marketing and PR; leadership development; board governance; and meetings and event management.

Gavian provides associations with the ability to obtain customized, high-quality and cost-effective solutions which will help them achieve  their strategic objectives.