Like many of us, Mark Mondello didn’t grow up wanting to be an engineer—he simply liked to tinker. Raised on the south side of Chicago, his family didn’t have much money, so his father (a meat packer) fixed anything that broke. Mondello watched over his dad’s shoulder and quickly learned the mechanics of how things worked. Soon, he could fix most anything from sprinkler heads and motors to air conditioners and cars. Read More in Design World.