Nebojsa Keresevic More about Nebojsa Keresevic Nebojsa (Nebo) Keresevic is the owner and president of NK Construction & Design, a licensed Pennsylvania structural contractor and remodeler with more than 20 years in construction. A Certified Aging-in-Place Specialist (CAPS), Nebo leads structural and remodeling projects across Philadelphia and Bucks, Montgomery, Chester and Delaware counties, including load-bearing wall removal, steel and LVL beam installation, foundation and sagging-floor repair, kitchen and bathroom remodeling, and aging-in-place renovations. NK works with a licensed structural engineering partner for stamped plans and permits. PA HIC #176617 · Philadelphia License #059408 · BBB A+ · BuildZoom Top 1% · BIA Philadelphia member.