Maribel Koella is Director and Principal of NAI Knoxville, a commercial real estate firm. NAI Knoxville has been nationally certified as a Woman-Owned Business & Woman-Owned Small Business by the Women’s Business Enterprise National Council. NAI Knoxville has also been nationally certified as a Minority-Owned Business by the Tennessee Minority Supplier Development Council. Maribel is a member of the Society of the Industrial and Office Realtors (SIOR) and a Certified Commercial Investment Member. She is currently on the board of directors of the East Tennessee Supporting Organization, and has served on the boards of the Knoxville Chamber of Commerce, the Blount County Chamber of Commerce, the Smoky Mountain Tremont Institute, the Smoky Mountain Convention & Visitors Bureau, the East Tennessee Foundation, and the National Parks Conservation Association. Maribel has a Bachelor of Arts degree in Business Administration from the University of the Americas.