Mary Gillespie

Mary Gillespie
Northern Virginia Realtor
From the Office of: Great Falls Office
Berkshire Hathaway HomeServices PenFed Realty
9912 B Georgetown Pike
Great Falls, VA  22066
Direct: 703-930-7536
Office: 703-539-1500
Current Listings:  Click Here
Recent Transactions:  Click Here
Areas Served:   Alexandria County
All of Northern Virginia
Arlington County
Fairfax City
Fairfax County
Falls Church County
Loudoun County
Market Areas Served:  
Counties: Fairfax, Loudoun
Specialties: Million Dollar Homes
New Constructions
Northern Virginia Resales
Languages: English
  • Women In Technology (WIT) Executive Leadership Award (Washington, DC Metro Region)

  • Keller Williams Realty “Rookie of the Year” Award (McLean/Great Falls)

  • Multi-Million Dollar Club 2014, Northern Virginia Association of Realtors (NVAR)

  • Founding Member and Lead, Nextdoor Great Falls – the Great Falls community private social network

  • Founder, Great Falls This Week (GFTW), a weekly email update to inform residents of local happenings

  • Twenty years experience in marketing and channel sales, Internet and Technology Industries

  • Fairfax County, Virginia native, long-time Great Falls resident, one of the first homeowners at the Reston Town Center

Born in Washington, DC and raised in Reston, Virginia, Mary built a career in marketing, business development and sales in start-ups and early stage technology companies. The fast paced environment, ability to affect change and help grow a business became her passion. As technology played an increasingly important role in the residential real estate industry she decided to combine her love of the two fields – technology and real estate – with her ability to help people connect within their communities. Hence, Gillespie Realty Group (GRG) was born.

Mary’s first “real” job was working for the Washington Redskins in an entry level public relations role during the early 1990s. Mary’s career in technology began in 1995 when she joined Internet backbone company PSINet where she served in sales and marketing roles.  In 1998 she joined Proxicom, a leading web development firm and managed clients such as Mercedes Benz Credit Corporation and Virginia’s Center for Innovative Technology.

In 1999 Mary co-founded and was CEO of LaunchFuel, a venture-backed company that provided strategic business advisory services to portfolio companies and partnered with leading universities, research institutions, corporations and government agencies to commercialize intellectual property. In 2003 Mary joined MicroStrategy as Vice President, Business Development to help spin-out, an industry-leading technology provider of interactive security, automation and energy management solutions.  For the past ten years as the company has enjoyed incredible growth, Mary has held a variety of positions including Vice President, Marketing and Business Development, Vice President, Sales Programs, and Vice President, Academy.

Mary has often been described as a connector, someone who is skilled at and enjoys connecting individuals who might benefit from an introduction to each another.  As such, she is the Founding Member of Nextdoor Great Falls, a free, private social network that helps residents stay informed about Great Falls happenings. Residents can organize and announce events, share recommendations, post information about local sports registrations and school activities, organize playgroups, post jobs, etc.


Mary attended Virginia Tech and George Mason University, where she earned a Bachelor of Arts degree.  She was a founding board member of Virginia Tech KnowledgeWorks, has served on the advisory board of George Mason University’s Executive MBA program and the advisory board of the Business Alliance of George Mason University (formerly known as GMU Century Club).  She is also an Alumna of Mindshare, an invitation-only CEO group for emerging and high growth technology companies in the Washington, D.C. region, and an alumna of Springboard, which sources, coaches and showcases high growth, women-led companies seeking equity capital for growth.

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