Inspired by her older sister with a severe disability and a general feeling that people with disabilities were treated unjustly, Diane Haar decided to become a lawyer to advocate for them. After graduating from UC Berkeley she attend Yale University and obtained a law degree and Masters in Public Health simultaneously. Her practice in Hawaii focuses on helping person with disabilities and their families navigate various VA and Social Security benefit programs. She has lobbied the US house and Senate delegation about keeping Social Security benefits intact against budgetary pressures to reduce them. Her disabled sister lives in California, where she believes programs and facilities are better than what is available in Hawaii.