Lacy was born in Lubbock, Texas. She gets her interest in numbers from her father, who led monthly household budget meetings around the kitchen table, an offshoot of his career in developing accounting software for customers throughout the U.S. and Canada. Her interest in language comes from her mother, who taught speech therapy in public schools and later became a consultant, working with children from birth to three years old. Both parents were avid listeners and encouragers, ready to support Lacy and Lance, her brother, in their many pursuits. There was always a DIY project at home – remodeling half of the house, installing a sprinkler system, painting rooms, or redoing floors.

She attended Texas Tech University, majored in English and Sociology, and worked part-time as a legal clerk in a law office. Two summers were spent singing with a prison ministry group that worked in minimum- and maximum-security facilities, including death row in several states. She also served as a Girl Scout troop leader.

She completed a master’s degree in English and then transferred to Oklahoma State University, where she pursued her Ph.D. in Technical Communication, a degree focused on conveying complex technical information clearly and effectively to various audiences. While in graduate school, Lacy began writing grants for nonprofits, taught undergraduate classes, and coordinated a statewide fire safety program for people with disabilities.

Lacy moved to Hammond in 2008 where she has lived and worked for the last 17 years. She began her public service by working for Turtle Cove Environmental Research Station, a division of Southeastern Louisiana University, where she wrote grants and created outreach materials. She was hired by the City of Hammond in 2010 to serve as a grants writer and later directed the first grants department. In 2014, she was promoted to Director of Administration, serving under Mayor Mayson Foster and later under Mayor Pete Panepinto.

For more than ten years, Lacy managed more than 300 employees in 15 departments and oversaw the completion of complex infrastructure improvements. She also developed special programs and events, such as the return of the Hammond Farmer’s Market, the first Zemurray fishing rodeo and an urban fishing program, multiple state/regional conferences, and the rebirth of the Hammond airshow.

In 2024, Lacy joined ELOS Environmental, a Hammond-born company, as a Senior Project Manager. There, she directs the company’s grants consulting services and works with local governments across Louisiana to secure and manage millions of dollars in grant awards. She has built a reputation for moving complex projects forward.

She is married to Joseph Dominick, Executive Director of the award-winning Florida Parishes Juvenile Detention Center that serves Tangipahoa and four other parishes. She is the bonus mom of Mason Dominick, a Southeastern student completing his basic training for the Louisiana Army National Guard, and Maddie Dominick, a ninth grader at St. Thomas Aquinas. They have four dogs -- Boudin, Andouille, Oakley, and Chantilly -- and always a DIY project or two.