About Us The Masonry Advisory Council (MAC) is a non-profit organization that provides support to the masonry construction industry. Our continual efforts raise awareness and elevate the process of constructing structurally sound, beautifully made, and well-crafted buildings. We collaborate with architects, suppliers, masons, and other industry professionals to preserve the art of masonry. Our continual efforts raise awareness and elevate the process of constructing structurally sound and well-crafted buildings. The Masonry Advisory Council makes resources accessible by educating, promoting, and marketing the benefits of masonry construction, materials, and technologies through educational and informational programs in Illinois and NW Indiana.