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About Theo & Co

At Theo & Co. we’re all about easy sophistication.  We love mixing old with new.  Our use of natural materials, along with vintage art, mirrors and accessories creates warm, welcoming interiors.    Our neutral palettes – with definite hints of color – are elegant and timeless.

About Diane

Diane Hemmersbaugh launched Theo & Co. in 2019 to work with people to create homes they love.  Following a career in public policy she focused on raising her family and involvement in community service.  Learn more about our commitment to giving back                . During that time she discovered a love for design and earned a certificate in Interior Design from the New York Institute of Art and Design.  


Drawing upon her varied experiences as a professional, wife and mother (and dog mom!) Diane collaborates with clients to make their home a place to feel good.  A place that’s beautiful, comfortable and a reflection of you.


Diane brings a strong work ethic, a sense of humor and approachable manner to all her projects.  She lives in Potomac, Maryland with her husband, two daughters and golden retriever (Odie).  In her free time she can be found enjoying a glass of wine with family or friends, boating in Solomons Island, Maryland and exploring all things design online.  

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