Mark Ein is the Co-Chairman and Principal Shareholder of Kastle Systems, LLC as well as the CEO and Founder of Venturehouse Group, LLC. In addition, he is the Owner and Founder of the Washington Kastles, DC's World TeamTennis franchise. Mr. Ein is deeply involved with philanthropic works in DC and has served, and continues to serve, on different committees around the District. He is currently dating Sally Stiebel

[Last updated on September 14, 2012] 

#SEEMETAKEOVER | Tuesday June 10, 2014

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mark ein in NY Giants Training Camp Outing at Frames NYC
mark ein in White House Correspondents' Dinner 2013

Malaria No More Launch Party | Thursday December 13, 2012

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mark ein in Malaria No More Launch Party
Mark Ein

Kastles vs. Boston Lobsters | Monday July 16, 2012

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mark ein in Kastles vs. Boston Lobsters

Red, White and Boom | Wednesday July 4, 2012

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mark ein in Fourth Annual Ball On The Mall
mark ein in Jete Society Mad Hatters Dance Party

Hot Hundred Holiday Party | Friday December 16, 2011

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Irina Shayk, Julie Henderson
Mark Ein
mark ein in Washington Kastles v. Boston Lobsters

Publicyte Launch Party | Tuesday June 21, 2011

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mark ein in Washington Life's Real Housewives of D.C. After-Party

Washington Kastles After Party | Thursday July 15, 2010

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mark ein in UrbanDaddy presents the Patron Secret Dining Society
mark ein in UrbanDaddy presents the Patron Secret Dining Society