Construction management company Heery International announced Tuesday that it has settled a six-year-old lawsuit with the DeKalb County Board of Education for $7.5 million.

Heery and the school district have been embroiled in litigation over canceled school construction contracts since 2007. Heery contended the school district owed it $478,000 in unpaid invoices after the school board fired Heery for alleged mismanagement of construction projects. The school district countersued, alleging breaches of contract and racketeering, and claimed it was owed as much as $100 million in damages.