Untreated ADHD in the workplace is more common than you think, largely because girls and women go largely undiagnosed. They tend to have the inattentive type of this disorder. People with ADHD can be incredibly resourceful, creative and bright, but may struggle with executive-functioning skills such as planning, time-awareness and organization. For that reason, they are often unfairly maligned as lazy or irresponsible, which can make the workplace pretty stressful for all involved.