The G7 team runs a unique real estate practice dedicated to Customer Success.  We are a Relationship based team, fostering trust and not pushing product. We strive towards Authenticity, which benefits both our customers and our team long term. We believe in Collaboration with our clients, a two-way street that serves everyone. We want to be an exceptional source of candid Information to our clients and your referrals.   

Our Team

Mark Duer

Mark Duer


RESIDENTIAL Mark Duer, our Residential Realtor®, has lived in Petworth since 2007 after 16 years in Manhattan, where he first got his real estate license. While in New York City, he cultivated an international singing career and can still be heard in DC with some of the nation’s best early music ensembles. Mark also spent a decade in strategic communications – from non-profit to the Fortune 100 level. Mark’s diverse professional training and life experiences ­­- as well as his engaging personality - uniquely equip him to provide top-notch, customized residential real estate counsel to our clients.

Ken Rub

Ken Rub

COMMERCIAL. Ken Rub lives and works on Georgia Avenue, leading the team at G7 as Managing Director. Ken has lived in the DC area for more than 26 years and has extensive expertise in commercial real estate. He holds a Master of Real Estate from Johns Hopkins, and has financed construction projects for commercial banks in his previous career.  Ken moved to the DC area when he was stationed at the White House Communications Agency while serving in the US Army. In his spare time, Ken teaches Kundalini Yoga on Sunday mornings, is a Crossfit enthusiast, and sings in an award winning A Cappella chorus.

Lawrence Rondon

Lawrence Rondon

CAPITAL  Lawrence Rondon is a Washington  native and our team's Capital SVP. For more than 25 years, he has helped both for-profit and not-for-profit development groups unlock the potential of their properties to meet their organizations’ missions. His deep experience in construction and finance with commercial banks, private developers, family offices, and investment funds has allowed his clients to achieve their goals in both up and down markets. Lawrence has a passion to contribute to the renaissance of his home town and all its citizens.  He enjoys nothing more than welcoming newcomers to the many cultural, entertainment, and outdoor activities that the Washington area offers.