Lacy has worked for UNT Dallas since 2006 when she was tasked by UNT System leadership to create the human services management and leadership program. She was promoted to dean of human services in 2016. During her time at UNT Dallas, Lacy has been instrumental in building relationships with the community and area leaders, and launching Community Engagement Day in collaboration with World Vision and the State Fair of Texas. Community Engagement Day seeks to bring together non-profit and community leaders throughout the Dallas-Fort Worth Metroplex in an effort to better serve the region through partnerships and shared resources.