After a 20 year career in the advertising industry, Richard Mahlmann created a boutique outdoor media company, Mahlmann Media. MMI focuses on high end billboards and wallscapes in top markets in the US.

In 1996, Susan Mahlmann joined the company as CFO and expanded its focus to the Green Building sector, creating Yorkshire Development and the first privately funded LEED building in the U.S. While both companies maintain independence from the other, the business goal was to create a balance between the natural cycles of advertising and commercial real estate.