Miao began her career with Texas Health at Texas Health Presbyterian Hospital Dallas as an administrative resident and administrative fellow, including time in 2001-02 as interim director of Digestive Diseases and Women's Specialty Services. She followed that with stints as director of Women's and Children's Clinics, Facilities Development and Innovation and as director-Ambulatory Clinics, Facilities Development and Innovation.

Miao served as a board member of the Dallas chapter of the American Cancer Society and an advisory board member of the Greater Dallas Asian American Chamber of Commerce. In 2007, she completed her participation in Leadership Dallas, a leadership development program hosted by the Greater Dallas Chamber of Commerce aimed at providing the region with a source of diverse leaders who are prepared to serve as catalysts of positive change for the quality of life in the area.

Miao received a bachelor's degree in biomedical engineering from Johns Hopkins University and a master's degree in healthcare administration, with a concentration in financial management and quality management, from the University of North Carolina.

In 2001, Miao received a Texas Health Mosaic Pin award, recognizing outstanding support of diversity in the workplace and in the community. She has been a member of the American College of Healthcare Executives since 1999.