See what employees say it's like to work at Mountain Commerce Bank. Salaries, reviews, and more - all posted by employees working at Mountain Commerce Bank. East Tennessee, Community Bank, Johnson City TN Bank, Erwin TN Bank, Knoxville Business Banking, Online Banking, Mobile Banking. Mountain Commerce Bank, Unicoi Branch at 4200 Unicoi Drive, Unicoi, TN 37692. Check client review, rate this bank, find bank financial info, routing numbers.