Post Traumatic Stress Disorder and/or Traumatic Brain Injury

Having 2 children with unrelated PTSD, I recognize that their mental journeys are part of my life. I am considering having PTSD as a niche if I choose to become a Life Coach. My question relates to the physical “damage” experienced by an individual through concussions, etc. My experience is that the PTSD brain can become “stuck” like a record that continues to “skip” on the player. This seems to be one of the conditions of PTSD. Is this a viable niche for Life Coaching or is does it fall under a medical services – therapy, etc? Have you dealt with this type of situation?