In addition to an impeccable reputation built on area residential sales, the principals of the firm have a keen understanding of the demands of commercial real estate ownership and transactions. Personally vested in a commercial portfolio of properties, the Mackens have also managed, leased and sold various commercial ventures for such national and regional corporate leaders as:   The Circle K Corporation   Texaco Gasoline   Kentucky Fried Chicken   USA Grocers   The River Parc Professional Centre