Interview with Marion Petty III Mental Health Professional Petty has worked for 15 years in the area of mental health. Graduated with a Bachelor of Arts from Missouri Western State University. He started his career working with kids and their families in Wyandotte County Marion worked with kids with mental health needs for 10 years for the last 5 years, he has been working with the homeless helping clients learn the skills needed for gaining and keeping housing. I also built relationships with landlords in the area.