In 1884 Gantt began working as a draughtsman at the iron foundry and machine-shop Poole & Hunt in Baltimore.[3][4] In 1887 he joined Frederick W. Taylor in applying scientific management principles to the work at Midvale Steel and Bethlehem Steel, working there with Taylor until 1893. In his later career as a management consultant and following the invention of the Gantt chart, he designed the 'task and bonus' system of wage payment and additional measurement methods worker efficiency and productivity.