About The Blackman Group

Commitment. Expertise. Passion.

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Chris Blackman The Blackman Group


Principal of The Blackman Group

Email: chris.blackman@compass.com

Tel: 214-458-1747

Office: 469-802-0054

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The Blackman Group (TBG) is headed up by Chris Blackman, a “DBest” designated realtor and recognized top producer in the Dallas Metroplex. Family homes, investment properties, recreational properties, and luxury leases: TBG handles it all with responsiveness to our clients and deep knowledge of the market.


Whether we are helping with a “make-ready” to bring a property to market or are searching for the perfect new home, TBG team members show their energy and enthusiasm for matching clients with properties they will love.

Diana Blackman The Blackman Group



Email: diana.blackman@compass.com

Tel: 214-773-3454

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Diana Blackman, a Dallas native, swears she is “the Search Queen,” as she loves nothing more than finding the right fit for her clients when it comes to neighborhood, schools, commute, etc. Focusing on working with buyers, Diana is in constant pursuit of hip pockets and other hidden gems that will spark joy for her clients.

Mary Markey The Blackman Group



Email: mary.markey@compass.com

Tel: 469-682-8821

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Mary Markey, a fourth-generation Lakewood resident, enjoys all aspects of home buying and selling. From assisting sellers in staging their homes or helping buyers envision the potential in a property, Mary’s clients are guaranteed an enjoyable real estate transaction.

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Email: marykatharine.gill@compass.com

Tel: 214-803-2314

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Mary Katharine brings invaluable skills, relationships, experience, and energy to all her clients. Formally trained in sales with over 15 years of experience, her passion for what makes a house a home so evidently suits her real estate endeavors.

John Smith The Blackman Group



Email: j.smith@compass.com

Tel: 214-744-0477

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John Smith studied architecture before channeling his knowledge of design into architectural photography and real estate. His vision and passion for architecture drive John in his quest to help his real estate clients locate, secure, and call architecturally significant properties their homes.

Lisa Cassell The Blackman Group



Email: lisacassell@yahoo.com

Tel: 817-707-3894

Lisa graduated from The University of Texas in Arlington with her BBA in Accounting after 8 years in McDonald’s polyester.  She began her professional career with Grant Thornton as an auditor and spent two years being exposed to many different industries as well as 60-hour work weeks.  After her time at ‘Grant’, she was hired as a consolidations accountant with PepsiCo Foods International, accounting for turmeric flavored yam chips and learning to call the soft drink machine a ‘Pepsi’ machine and NOT a ‘Coke’ machine.  She then moved onto the real estate world doing personal accounting for the Trammell Crow family working with the family investments in Trammell Crow Residential and The Wyndham Hotel Company.   Her next career move introduced her to Chris while working at a distribution company in Fort Worth.  Chris and Lisa stayed in touch and as Chris’ business grew, he brought Lisa on as his controller.   Lisa enjoys rescuing animals, vegan cooking, reading, riding her motorcycle and spending her summers ‘back home’ on Long Island, NY.

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Business Director

Email: wellsley.schenck@compass.com

Tel: 407-446-1804

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Born and raised in Winter Park, Florida, Wellsley moved to Dallas to attend Southern Methodist University. After graduating with a bachelor’s degree in Advertising and Fashion Media in 2020,  Wellsley went on to receive her master's degree in Business Management in 2021 from SMU’s Cox School of Business. 

She knew she wanted to stay in Dallas, the city she had grown to love. In 2021 she joined a top producing team, the Blackman Group where she continues to search for ways to grow and learn and make each client relationship personal.