True worked extensively in developing and training others in mental health disaster assistance. She helped organize disaster mental health assistance for the residents of San Francisco after San Francisco was hit by the Loma Prieta Earthquake in 1989. Later, she went to Japan to provide mental health assistance to disaster victims after the Kansai-Awaji Earthquake in 1995. For six months, she trained mental health professionals on disaster mental health assistance as a visiting Fulbright Senior Scholar at Kobe University Medical School. Similarly, she later worked with the Japanese Community and Cultural Center of Northern California (JCCCNC) to train Japanese disaster workers in San Francisco in disaster mental health assistance. She continued with her disaster assistance work in 2011 after the Tohoku Region Disaster when she organized mental health disaster training for a select group of workers from the affected Tohoku region.