Families First started in 1890 as an orphanage on the Westside of the city on what is now the Spelman campus.
Tucker, who said he always been an “entrepreneurial person,” praised the work of Families First but said it was best to leave the position to someone could focus solely on the organization.
Related: Families First names Terry Tucker new CEO
Families First is forming a search committee to vet candidates for the CEO position.
“In the meantime, Families First continues to focus on our mission of serving our clients and helping families and children in need,” according to spokeswoman Alice Bagley.
Until a successor is found, longtime board member, Marybeth Leamer will serve as the interim CEO. Leamer retired from Cox Enterprises earlier this year, where she served as executive vice president of human resources and administration.
Cox Enterprises, which owns The Atlanta Journal-Constitution, is one of the nonprofit’s corporate donors.
Prior to joining Families First, Tucker, a father of three, was chief strategy officer and general counsel with the City of Refuge.
At the time, Sunny Burrows, then chairman of the board of Families First praised Tucker’s “mix of creativity, passion, and respect for the power of data, all of which we expect to leverage to even greater impact on behalf of the children and families we serve.”
There are nearly 14,000 children in foster care in Georgia, up from 7,500 in 2011, according to the Families First website.
Of those, 50 percent are less likely to graduate from high school and 40 percent have had more than 40 percent.